KPL/FK Topocentric Reference Frame Definition Kernel for DSN Stations ===================================================================== Original file name: earth_topo_201023.tf Creation date: 2020 Oct 28 12:35 Created by: Nat Bachman (NAIF/JPL) Introduction ===================================================================== This file defines topocentric reference frames associated with each of the DSN stations cited in the list below under "Position Data." Each topocentric reference frame ("frame" for short) is centered at the associated station and is fixed to the earth. Mathematically, a frame "definition" is a specification of the orientation of the frame relative to another frame. In this file, the other frame, which we'll refer to as the "base frame," is the terrestrial reference frame ITRF93. The orientation of a topocentric frame relative to the base frame relies on a reference spheroid (see "Data Sources" below). The z-axis of the topocentric frame contains the station location and is normal to the reference spheroid: the line containing the z-axis intersects the reference spheroid at right angles. The x-axis points north and the y-axis points west. Note that stations normally have non-zero altitude with respect to the spheroid. Loosely speaking, a topocentric frame enables computations involving the local directions "north", "west," and "up" at a surface point on an extended body. For example, the "elevation" of an object relative to the center of a topocentric frame is the object's latitude in that frame. The corresponding azimuth is the angle from the topocentric frame's x-axis to the projection of the center-to-object vector onto the topocentric frame's x-y plane, measured in the clockwise direction. The orientation of a topocentric frame relative to the base frame can be described by an Euler angle sequence. Let M be the rotation matrix that maps vectors from the base frame to a specified topocentric frame. Then M = [ Pi ] [ Pi/2 - LAT ] [ LON ] 3 2 3 where LON, LAT are the associated station's geodetic latitude and longitude. Note that the frame definitions below actually provide Euler angles for the inverse of M and use units of degrees, so the angle sequences are -1 o o M = [ -LON ] [ LAT - 90 ] [ 180 ] 3 2 3 See the Rotation Required Reading for details concerning Euler angles. Regarding the structure of this file ------------------------------------ The SPICE utility PINPOINT was used to create the topocentric frame specifications contained in this file. The comment file earthstns_fx_201023.cmt was used as an input to the PINPOINT run, and that file is automatically included by PINPOINT in the frame kernel it creates. Using this kernel ===================================================================== Revision description -------------------- This kernel is based on data from a single, current source: [1]. This kernel supersedes the kernel earth_topo_050714_v2.tf The set of stations covered by this file has changed from that file as follows: Deleted stations (not present in current file): PARKES DSS-12 DSS-16 DSS-17 DSS-23 DSS-27 DSS-28 DSS-33 DSS-42 DSS-46 DSS-49 (alternate name for PARKES) DSS-61 DSS-64 (alternate name for DSS-65) DSS-66 Added stations: DSS-35 DSS-36 DSS-56 Name transfers---name now refers to a new station: DSS-53 Planned updates --------------- Updates will be be made to keep this file in sync with updates to the source document [1]. Values for DSS-53 are expected to be updated. Values for DSS-23 will be added. There is no schedule for these changes at this time. Using this kernel ===================================================================== Kernel loading -------------- In order for a SPICE-based program to make use of this kernel, the kernel must be loaded via the SPICE routine FURNSH. If you are running application software created by a third party, see the documentation for that software for instructions on kernel management. See also "Associated frame kernels" and "Associated PCK files" below. Users requiring data from the superseded frame kernel earth_topo_050714_v2.tf can load that file in addition to this one. In the case of conflicting data, data from the file loaded later will take precedence. ** Caution **: the file named above is the only DSN station frame kernel that may be safely loaded together with this file. The first version of that file earth_topo_050714.tf and older DSN station frame kernels contain incompatible frame specification keywords that prevent the SPICE library's kernel data precedence algorithm from operating correctly. Associated PCK files -------------------- For high-accuracy work, this kernel should be used together with a high-precision, binary earth PCK file. NAIF produces these kernels on a regular basis; they can be obtained via anonymous ftp from the NAIF server naif.jpl.nasa.gov or downloaded from the URL https://naif.jpl.nasa.gov/pub/naif/generic_kernels/pck/ The PCK is located in the path pub/naif/generic_kernels/pck The file name is of the form earth_000101_yymmdd_yymmdd.bpc The first two dates are the file's start and stop times; the third is the epoch of the last datum in the EOP file: data from this epoch forward are predicted. The file's coverage starts at a fixed date (currently chosen to be 2000 Jan. 1) and extends to the end of the predict region, which has a duration of roughly 3 months. The same location contains a file with identical contents and a fixed name: earth_latest_high_prec.bpc This file may be convenient for automated downloads. NAIF also provides a low-accuracy, long-term predict binary Earth PCK. See the file aareadme.txt in the location cited above for details. Associated SPK files -------------------- This file is compatible with the SPK files earthstns_fx_201023.bsp [reference frame: EARTH_FIXED] earthstns_itrf93_201023.bsp [reference frame: ITRF93 ] both of which provide state vectors for each station covered by this file. Most applications will need to load one of the above SPK files in order to make use of this frame kernel. Data sources ===================================================================== All data presented here are from reference [1]. Reference Spheroid ------------------ The reference bi-axial spheroid is defined by an equatorial and a polar radius. Calling these Re and Rp respectively, the flattening factor f is defined as f = ( Re - Rp ) / Re For the reference spheroid used by this file, the equatorial radius Re and inverse flattening factor 1/f are Re = 6378137 m 1/f = 298.2572236 These parameters may be used to convert station locations at the epoch 2003 JAN 01 TDB to geodetic coordinates matching those given in [1]. The reference spheroid is used for derivation of the topocentric frame orientation Euler angles used in this file. The PCK file listed as a PINPOINT input below defines Earth radii consistent with these parameters. This PCK is not provided by NAIF, but the PCK may be created from the following text by prefixing a backslash character to the begindata begintext strings in the lines below: KPL/PCK begindata BODY399_RADII = ( 6378.137, 6378.137, 6356.752314247833 ) begintext Users who create this file must be sure that the "ID word" KPL/PCK occupies the very first 7 characters of the file, and to add a carriage return at the end of the file. See the SPICE Toolkit documents "PCK Required Reading" and "Kernel Required Reading" for details of the SPICE text PCK format. Epoch ----- The epoch associated with these data is given by the source as "2003.0." The time variation of the data is slow enough so that specification of the time system is unimportant. However, in the creation of this file, the epoch is assumed to be 2003 Jan 1 00:00:00 TDB At this epoch, the station positions are as given below. The movement of the stations due to tectonic plate motion is taken into account in creation of the frame definitions used in this file: the center locations and orientations of the reference frames are associated with station locations extrapolated to the date 2020 October 23 00:00:00 TDB This extrapolation results in a small rotation of the frames relative to their orientations as given by the previous version of this kernel. Position data ------------- Station locations in the ITRF93 frame at the specified epoch are: Antenna Diameter x (m) y (m) z (m) DSS 13 34m -2351112.659 -4655530.636 +3660912.728 DSS 14 70m -2353621.420 -4641341.472 +3677052.318 DSS 15 34m -2353538.958 -4641649.429 +3676669.984 {3} DSS 24 34m -2354906.711 -4646840.095 +3669242.325 DSS 25 34m -2355022.014 -4646953.204 +3669040.567 DSS 26 34m -2354890.797 -4647166.328 +3668871.755 DSS 34 34m -4461147.093 +2682439.239 -3674393.133 {1} DSS 35 34m -4461273.090 +2682568.925 -3674152.093 {1} DSS 36 34m -4461168.415 +2682814.657 -3674083.901 {1} DSS 43 70m -4460894.917 +2682361.507 -3674748.152 DSS 45 34m -4460935.578 +2682765.661 -3674380.982 {3} DSS 53 34m +4849339.965 -360658.246 +4114747.290 {2} DSS 54 34m +4849434.488 -360723.8999 +4114618.835 DSS 55 34m +4849525.256 -360606.0932 +4114495.084 DSS 56 34m +4849421.679 -360549.659 +4114646.987 DSS 63 70m +4849092.518 -360180.3480 +4115109.251 DSS 65 34m +4849339.634 -360427.6637 +4114750.733 Notes from [1]: {1} Position absolute accuracy estimated to be +/- 3cm (0.030m) (1-sigma) for each coordinate. {2} Position absolute accuracy estimated to be +/- 3m (3-sigma) for each coordinate. {3} Decommissioned. For historical reference only. Velocity data ------------- Station velocities in Cartesian coordinates, with respect to the ITRF93 frame, are shown below. Reference epoch for plate motion: 01-JAN-2003 00:00 Plate motion model, m/year X Y Z Goldstone: Stations numbered 1X & 2X -0.0180 0.0065 -0.0038 Canberra: Stations numbered 3X & 4X -0.0335 -0.0041 0.0392 Madrid: Stations numbered 5X & 6X -0.0100 0.0242 0.0156 Accuracy -------- Location uncertainties at the 1 sigma level, for cylindrical coordinates, are given by Table 7 of reference [1]. References ---------- The data provided here are taken from the DSN document [1] "301 Coverage and Geometry." DSN No. 810-005, 301, Rev. M Issue Date: September 04, 2020. JPL D-19379; CL#20-3996. URL: https://deepspace.jpl.nasa.gov/dsndocs/810-005/301/301M.pdf Documentation for the SPICE Toolkit software is available here: URL: https://naif.jpl.nasa.gov Kernel Data ===================================================================== EARTH_FIXED alias mapping ------------------------- Constant-offset frame definition for the frame alias EARTH_FIXED: EARTH_FIXED is mapped to ITRF93. \begindata TKFRAME_EARTH_FIXED_RELATIVE = 'ITRF93' TKFRAME_EARTH_FIXED_SPEC = 'MATRIX' TKFRAME_EARTH_FIXED_MATRIX = ( 1 0 0 0 1 0 0 0 1 ) \begintext Kernel contents below were created by PINPOINT. The output includes the full PINPOINT setup file, including its comment area. PINPOINT output ===================================================================== FILE: earth_topo_201023.tf This file was created by PINPOINT. PINPOINT Version 3.2.0 --- September 6, 2016 PINPOINT RUN DATE/TIME: 2020-10-23T19:33:32 PINPOINT DEFINITIONS FILE: earthstns_fx_201023.cmt PINPOINT PCK FILE: earthstns_itrf93_201023.tpc PINPOINT SPK FILE: bogus The input definitions file is appended to this file as a comment block. Body-name mapping follows: \begindata NAIF_BODY_NAME += 'DSS-13' NAIF_BODY_CODE += 399013 NAIF_BODY_NAME += 'DSS-14' NAIF_BODY_CODE += 399014 NAIF_BODY_NAME += 'DSS-15' NAIF_BODY_CODE += 399015 NAIF_BODY_NAME += 'DSS-24' NAIF_BODY_CODE += 399024 NAIF_BODY_NAME += 'DSS-25' NAIF_BODY_CODE += 399025 NAIF_BODY_NAME += 'DSS-26' NAIF_BODY_CODE += 399026 NAIF_BODY_NAME += 'DSS-34' NAIF_BODY_CODE += 399034 NAIF_BODY_NAME += 'DSS-35' NAIF_BODY_CODE += 399035 NAIF_BODY_NAME += 'DSS-36' NAIF_BODY_CODE += 399036 NAIF_BODY_NAME += 'DSS-43' NAIF_BODY_CODE += 399043 NAIF_BODY_NAME += 'DSS-45' NAIF_BODY_CODE += 399045 NAIF_BODY_NAME += 'DSS-53' NAIF_BODY_CODE += 399053 NAIF_BODY_NAME += 'DSS-54' NAIF_BODY_CODE += 399054 NAIF_BODY_NAME += 'DSS-55' NAIF_BODY_CODE += 399055 NAIF_BODY_NAME += 'DSS-56' NAIF_BODY_CODE += 399056 NAIF_BODY_NAME += 'DSS-63' NAIF_BODY_CODE += 399063 NAIF_BODY_NAME += 'DSS-65' NAIF_BODY_CODE += 399065 \begintext Reference frame specifications follow: Topocentric frame DSS-13_TOPO The Z axis of this frame points toward the zenith. The X axis of this frame points North. Topocentric frame DSS-13_TOPO is centered at the site DSS-13, which at the epoch 2020 OCT 23 00:00:00.000 TDB has Cartesian coordinates X (km): -0.2351112979575E+04 Y (km): -0.4655530520237E+04 Z (km): 0.3660912660323E+04 and planetodetic coordinates Longitude (deg): -116.7944627147624 Latitude (deg): 35.2471635434595 Altitude (km): 0.1070439519876E+01 These planetodetic coordinates are expressed relative to a reference spheroid having the dimensions Equatorial radius (km): 6.3781370000000E+03 Polar radius (km): 6.3567523142478E+03 All of the above coordinates are relative to the frame EARTH_FIXED. \begindata FRAME_DSS-13_TOPO = 1399013 FRAME_1399013_NAME = 'DSS-13_TOPO' FRAME_1399013_CLASS = 4 FRAME_1399013_CLASS_ID = 1399013 FRAME_1399013_CENTER = 399013 OBJECT_399013_FRAME = 'DSS-13_TOPO' TKFRAME_1399013_RELATIVE = 'EARTH_FIXED' TKFRAME_1399013_SPEC = 'ANGLES' TKFRAME_1399013_UNITS = 'DEGREES' TKFRAME_1399013_AXES = ( 3, 2, 3 ) TKFRAME_1399013_ANGLES = ( -243.2055372852376, -54.7528364565405, 180.0000000000000 ) \begintext Topocentric frame DSS-14_TOPO The Z axis of this frame points toward the zenith. The X axis of this frame points North. Topocentric frame DSS-14_TOPO is centered at the site DSS-14, which at the epoch 2020 OCT 23 00:00:00.000 TDB has Cartesian coordinates X (km): -0.2353621740575E+04 Y (km): -0.4641341356237E+04 Z (km): 0.3677052250323E+04 and planetodetic coordinates Longitude (deg): -116.8895419347303 Latitude (deg): 35.4259001525718 Altitude (km): 0.1001385765773E+01 These planetodetic coordinates are expressed relative to a reference spheroid having the dimensions Equatorial radius (km): 6.3781370000000E+03 Polar radius (km): 6.3567523142478E+03 All of the above coordinates are relative to the frame EARTH_FIXED. \begindata FRAME_DSS-14_TOPO = 1399014 FRAME_1399014_NAME = 'DSS-14_TOPO' FRAME_1399014_CLASS = 4 FRAME_1399014_CLASS_ID = 1399014 FRAME_1399014_CENTER = 399014 OBJECT_399014_FRAME = 'DSS-14_TOPO' TKFRAME_1399014_RELATIVE = 'EARTH_FIXED' TKFRAME_1399014_SPEC = 'ANGLES' TKFRAME_1399014_UNITS = 'DEGREES' TKFRAME_1399014_AXES = ( 3, 2, 3 ) TKFRAME_1399014_ANGLES = ( -243.1104580652697, -54.5740998474282, 180.0000000000000 ) \begintext Topocentric frame DSS-15_TOPO The Z axis of this frame points toward the zenith. The X axis of this frame points North. Topocentric frame DSS-15_TOPO is centered at the site DSS-15, which at the epoch 2020 OCT 23 00:00:00.000 TDB has Cartesian coordinates X (km): -0.2353539278575E+04 Y (km): -0.4641649313237E+04 Z (km): 0.3676669916323E+04 and planetodetic coordinates Longitude (deg): -116.8871988309114 Latitude (deg): 35.4218525623111 Altitude (km): 0.9732064489353E+00 These planetodetic coordinates are expressed relative to a reference spheroid having the dimensions Equatorial radius (km): 6.3781370000000E+03 Polar radius (km): 6.3567523142478E+03 All of the above coordinates are relative to the frame EARTH_FIXED. \begindata FRAME_DSS-15_TOPO = 1399015 FRAME_1399015_NAME = 'DSS-15_TOPO' FRAME_1399015_CLASS = 4 FRAME_1399015_CLASS_ID = 1399015 FRAME_1399015_CENTER = 399015 OBJECT_399015_FRAME = 'DSS-15_TOPO' TKFRAME_1399015_RELATIVE = 'EARTH_FIXED' TKFRAME_1399015_SPEC = 'ANGLES' TKFRAME_1399015_UNITS = 'DEGREES' TKFRAME_1399015_AXES = ( 3, 2, 3 ) TKFRAME_1399015_ANGLES = ( -243.1128011690886, -54.5781474376889, 180.0000000000000 ) \begintext Topocentric frame DSS-24_TOPO The Z axis of this frame points toward the zenith. The X axis of this frame points North. Topocentric frame DSS-24_TOPO is centered at the site DSS-24, which at the epoch 2020 OCT 23 00:00:00.000 TDB has Cartesian coordinates X (km): -0.2354907031575E+04 Y (km): -0.4646839979237E+04 Z (km): 0.3669242257323E+04 and planetodetic coordinates Longitude (deg): -116.8747981085639 Latitude (deg): 35.3398920801982 Altitude (km): 0.9515064184845E+00 These planetodetic coordinates are expressed relative to a reference spheroid having the dimensions Equatorial radius (km): 6.3781370000000E+03 Polar radius (km): 6.3567523142478E+03 All of the above coordinates are relative to the frame EARTH_FIXED. \begindata FRAME_DSS-24_TOPO = 1399024 FRAME_1399024_NAME = 'DSS-24_TOPO' FRAME_1399024_CLASS = 4 FRAME_1399024_CLASS_ID = 1399024 FRAME_1399024_CENTER = 399024 OBJECT_399024_FRAME = 'DSS-24_TOPO' TKFRAME_1399024_RELATIVE = 'EARTH_FIXED' TKFRAME_1399024_SPEC = 'ANGLES' TKFRAME_1399024_UNITS = 'DEGREES' TKFRAME_1399024_AXES = ( 3, 2, 3 ) TKFRAME_1399024_ANGLES = ( -243.1252018914361, -54.6601079198018, 180.0000000000000 ) \begintext Topocentric frame DSS-25_TOPO The Z axis of this frame points toward the zenith. The X axis of this frame points North. Topocentric frame DSS-25_TOPO is centered at the site DSS-25, which at the epoch 2020 OCT 23 00:00:00.000 TDB has Cartesian coordinates X (km): -0.2355022334575E+04 Y (km): -0.4646953088237E+04 Z (km): 0.3669040499323E+04 and planetodetic coordinates Longitude (deg): -116.8753669250068 Latitude (deg): 35.3376112513319 Altitude (km): 0.9596290815794E+00 These planetodetic coordinates are expressed relative to a reference spheroid having the dimensions Equatorial radius (km): 6.3781370000000E+03 Polar radius (km): 6.3567523142478E+03 All of the above coordinates are relative to the frame EARTH_FIXED. \begindata FRAME_DSS-25_TOPO = 1399025 FRAME_1399025_NAME = 'DSS-25_TOPO' FRAME_1399025_CLASS = 4 FRAME_1399025_CLASS_ID = 1399025 FRAME_1399025_CENTER = 399025 OBJECT_399025_FRAME = 'DSS-25_TOPO' TKFRAME_1399025_RELATIVE = 'EARTH_FIXED' TKFRAME_1399025_SPEC = 'ANGLES' TKFRAME_1399025_UNITS = 'DEGREES' TKFRAME_1399025_AXES = ( 3, 2, 3 ) TKFRAME_1399025_ANGLES = ( -243.1246330749932, -54.6623887486681, 180.0000000000000 ) \begintext Topocentric frame DSS-26_TOPO The Z axis of this frame points toward the zenith. The X axis of this frame points North. Topocentric frame DSS-26_TOPO is centered at the site DSS-26, which at the epoch 2020 OCT 23 00:00:00.000 TDB has Cartesian coordinates X (km): -0.2354891117575E+04 Y (km): -0.4647166212237E+04 Z (km): 0.3668871687323E+04 and planetodetic coordinates Longitude (deg): -116.8730201399196 Latitude (deg): 35.3356884666268 Altitude (km): 0.9686879437011E+00 These planetodetic coordinates are expressed relative to a reference spheroid having the dimensions Equatorial radius (km): 6.3781370000000E+03 Polar radius (km): 6.3567523142478E+03 All of the above coordinates are relative to the frame EARTH_FIXED. \begindata FRAME_DSS-26_TOPO = 1399026 FRAME_1399026_NAME = 'DSS-26_TOPO' FRAME_1399026_CLASS = 4 FRAME_1399026_CLASS_ID = 1399026 FRAME_1399026_CENTER = 399026 OBJECT_399026_FRAME = 'DSS-26_TOPO' TKFRAME_1399026_RELATIVE = 'EARTH_FIXED' TKFRAME_1399026_SPEC = 'ANGLES' TKFRAME_1399026_UNITS = 'DEGREES' TKFRAME_1399026_AXES = ( 3, 2, 3 ) TKFRAME_1399026_ANGLES = ( -243.1269798600804, -54.6643115333732, 180.0000000000000 ) \begintext Topocentric frame DSS-34_TOPO The Z axis of this frame points toward the zenith. The X axis of this frame points North. Topocentric frame DSS-34_TOPO is centered at the site DSS-34, which at the epoch 2020 OCT 23 00:00:00.000 TDB has Cartesian coordinates X (km): -0.4461147689626E+04 Y (km): 0.2682439165980E+04 Z (km): -0.3674392434859E+04 and planetodetic coordinates Longitude (deg): 148.9819684925768 Latitude (deg): -35.3984712357100 Altitude (km): 0.6920025210140E+00 These planetodetic coordinates are expressed relative to a reference spheroid having the dimensions Equatorial radius (km): 6.3781370000000E+03 Polar radius (km): 6.3567523142478E+03 All of the above coordinates are relative to the frame EARTH_FIXED. \begindata FRAME_DSS-34_TOPO = 1399034 FRAME_1399034_NAME = 'DSS-34_TOPO' FRAME_1399034_CLASS = 4 FRAME_1399034_CLASS_ID = 1399034 FRAME_1399034_CENTER = 399034 OBJECT_399034_FRAME = 'DSS-34_TOPO' TKFRAME_1399034_RELATIVE = 'EARTH_FIXED' TKFRAME_1399034_SPEC = 'ANGLES' TKFRAME_1399034_UNITS = 'DEGREES' TKFRAME_1399034_AXES = ( 3, 2, 3 ) TKFRAME_1399034_ANGLES = ( -148.9819684925768, -125.3984712357100, 180.0000000000000 ) \begintext Topocentric frame DSS-35_TOPO The Z axis of this frame points toward the zenith. The X axis of this frame points North. Topocentric frame DSS-35_TOPO is centered at the site DSS-35, which at the epoch 2020 OCT 23 00:00:00.000 TDB has Cartesian coordinates X (km): -0.4461273686626E+04 Y (km): 0.2682568851980E+04 Z (km): -0.3674151394859E+04 and planetodetic coordinates Longitude (deg): 148.9814598395941 Latitude (deg): -35.3957879118433 Altitude (km): 0.6948787660279E+00 These planetodetic coordinates are expressed relative to a reference spheroid having the dimensions Equatorial radius (km): 6.3781370000000E+03 Polar radius (km): 6.3567523142478E+03 All of the above coordinates are relative to the frame EARTH_FIXED. \begindata FRAME_DSS-35_TOPO = 1399035 FRAME_1399035_NAME = 'DSS-35_TOPO' FRAME_1399035_CLASS = 4 FRAME_1399035_CLASS_ID = 1399035 FRAME_1399035_CENTER = 399035 OBJECT_399035_FRAME = 'DSS-35_TOPO' TKFRAME_1399035_RELATIVE = 'EARTH_FIXED' TKFRAME_1399035_SPEC = 'ANGLES' TKFRAME_1399035_UNITS = 'DEGREES' TKFRAME_1399035_AXES = ( 3, 2, 3 ) TKFRAME_1399035_ANGLES = ( -148.9814598395941, -125.3957879118433, 180.0000000000000 ) \begintext Topocentric frame DSS-36_TOPO The Z axis of this frame points toward the zenith. The X axis of this frame points North. Topocentric frame DSS-36_TOPO is centered at the site DSS-36, which at the epoch 2020 OCT 23 00:00:00.000 TDB has Cartesian coordinates X (km): -0.4461169011626E+04 Y (km): 0.2682814583980E+04 Z (km): -0.3674083202859E+04 and planetodetic coordinates Longitude (deg): 148.9785483057047 Latitude (deg): -35.3950941601377 Altitude (km): 0.6854849512296E+00 These planetodetic coordinates are expressed relative to a reference spheroid having the dimensions Equatorial radius (km): 6.3781370000000E+03 Polar radius (km): 6.3567523142478E+03 All of the above coordinates are relative to the frame EARTH_FIXED. \begindata FRAME_DSS-36_TOPO = 1399036 FRAME_1399036_NAME = 'DSS-36_TOPO' FRAME_1399036_CLASS = 4 FRAME_1399036_CLASS_ID = 1399036 FRAME_1399036_CENTER = 399036 OBJECT_399036_FRAME = 'DSS-36_TOPO' TKFRAME_1399036_RELATIVE = 'EARTH_FIXED' TKFRAME_1399036_SPEC = 'ANGLES' TKFRAME_1399036_UNITS = 'DEGREES' TKFRAME_1399036_AXES = ( 3, 2, 3 ) TKFRAME_1399036_ANGLES = ( -148.9785483057047, -125.3950941601377, 180.0000000000000 ) \begintext Topocentric frame DSS-43_TOPO The Z axis of this frame points toward the zenith. The X axis of this frame points North. Topocentric frame DSS-43_TOPO is centered at the site DSS-43, which at the epoch 2020 OCT 23 00:00:00.000 TDB has Cartesian coordinates X (km): -0.4460895513626E+04 Y (km): 0.2682361433980E+04 Z (km): -0.3674747453859E+04 and planetodetic coordinates Longitude (deg): 148.9812713832932 Latitude (deg): -35.4024166339779 Altitude (km): 0.6888490972130E+00 These planetodetic coordinates are expressed relative to a reference spheroid having the dimensions Equatorial radius (km): 6.3781370000000E+03 Polar radius (km): 6.3567523142478E+03 All of the above coordinates are relative to the frame EARTH_FIXED. \begindata FRAME_DSS-43_TOPO = 1399043 FRAME_1399043_NAME = 'DSS-43_TOPO' FRAME_1399043_CLASS = 4 FRAME_1399043_CLASS_ID = 1399043 FRAME_1399043_CENTER = 399043 OBJECT_399043_FRAME = 'DSS-43_TOPO' TKFRAME_1399043_RELATIVE = 'EARTH_FIXED' TKFRAME_1399043_SPEC = 'ANGLES' TKFRAME_1399043_UNITS = 'DEGREES' TKFRAME_1399043_AXES = ( 3, 2, 3 ) TKFRAME_1399043_ANGLES = ( -148.9812713832932, -125.4024166339779, 180.0000000000000 ) \begintext Topocentric frame DSS-45_TOPO The Z axis of this frame points toward the zenith. The X axis of this frame points North. Topocentric frame DSS-45_TOPO is centered at the site DSS-45, which at the epoch 2020 OCT 23 00:00:00.000 TDB has Cartesian coordinates X (km): -0.4460936174626E+04 Y (km): 0.2682765587980E+04 Z (km): -0.3674380283859E+04 and planetodetic coordinates Longitude (deg): 148.9776897067879 Latitude (deg): -35.3984500826733 Altitude (km): 0.6743286617334E+00 These planetodetic coordinates are expressed relative to a reference spheroid having the dimensions Equatorial radius (km): 6.3781370000000E+03 Polar radius (km): 6.3567523142478E+03 All of the above coordinates are relative to the frame EARTH_FIXED. \begindata FRAME_DSS-45_TOPO = 1399045 FRAME_1399045_NAME = 'DSS-45_TOPO' FRAME_1399045_CLASS = 4 FRAME_1399045_CLASS_ID = 1399045 FRAME_1399045_CENTER = 399045 OBJECT_399045_FRAME = 'DSS-45_TOPO' TKFRAME_1399045_RELATIVE = 'EARTH_FIXED' TKFRAME_1399045_SPEC = 'ANGLES' TKFRAME_1399045_UNITS = 'DEGREES' TKFRAME_1399045_AXES = ( 3, 2, 3 ) TKFRAME_1399045_ANGLES = ( -148.9776897067879, -125.3984500826733, 180.0000000000000 ) \begintext Topocentric frame DSS-53_TOPO The Z axis of this frame points toward the zenith. The X axis of this frame points North. Topocentric frame DSS-53_TOPO is centered at the site DSS-53, which at the epoch 2020 OCT 23 00:00:00.000 TDB has Cartesian coordinates X (km): 0.4849339786903E+04 Y (km): -0.3606578150048E+03 Z (km): 0.4114747567832E+04 and planetodetic coordinates Longitude (deg): -4.2534030911179 Latitude (deg): 40.4270841356896 Altitude (km): 0.8449081257927E+00 These planetodetic coordinates are expressed relative to a reference spheroid having the dimensions Equatorial radius (km): 6.3781370000000E+03 Polar radius (km): 6.3567523142478E+03 All of the above coordinates are relative to the frame EARTH_FIXED. \begindata FRAME_DSS-53_TOPO = 1399053 FRAME_1399053_NAME = 'DSS-53_TOPO' FRAME_1399053_CLASS = 4 FRAME_1399053_CLASS_ID = 1399053 FRAME_1399053_CENTER = 399053 OBJECT_399053_FRAME = 'DSS-53_TOPO' TKFRAME_1399053_RELATIVE = 'EARTH_FIXED' TKFRAME_1399053_SPEC = 'ANGLES' TKFRAME_1399053_UNITS = 'DEGREES' TKFRAME_1399053_AXES = ( 3, 2, 3 ) TKFRAME_1399053_ANGLES = ( -355.7465969088821, -49.5729158643104, 180.0000000000000 ) \begintext Topocentric frame DSS-54_TOPO The Z axis of this frame points toward the zenith. The X axis of this frame points North. Topocentric frame DSS-54_TOPO is centered at the site DSS-54, which at the epoch 2020 OCT 23 00:00:00.000 TDB has Cartesian coordinates X (km): 0.4849434309903E+04 Y (km): -0.3607234689048E+03 Z (km): 0.4114619112832E+04 and planetodetic coordinates Longitude (deg): -4.2540919192841 Latitude (deg): 40.4256248061962 Altitude (km): 0.8370724668605E+00 These planetodetic coordinates are expressed relative to a reference spheroid having the dimensions Equatorial radius (km): 6.3781370000000E+03 Polar radius (km): 6.3567523142478E+03 All of the above coordinates are relative to the frame EARTH_FIXED. \begindata FRAME_DSS-54_TOPO = 1399054 FRAME_1399054_NAME = 'DSS-54_TOPO' FRAME_1399054_CLASS = 4 FRAME_1399054_CLASS_ID = 1399054 FRAME_1399054_CENTER = 399054 OBJECT_399054_FRAME = 'DSS-54_TOPO' TKFRAME_1399054_RELATIVE = 'EARTH_FIXED' TKFRAME_1399054_SPEC = 'ANGLES' TKFRAME_1399054_UNITS = 'DEGREES' TKFRAME_1399054_AXES = ( 3, 2, 3 ) TKFRAME_1399054_ANGLES = ( -355.7459080807159, -49.5743751938038, 180.0000000000000 ) \begintext Topocentric frame DSS-55_TOPO The Z axis of this frame points toward the zenith. The X axis of this frame points North. Topocentric frame DSS-55_TOPO is centered at the site DSS-55, which at the epoch 2020 OCT 23 00:00:00.000 TDB has Cartesian coordinates X (km): 0.4849525077903E+04 Y (km): -0.3606056622048E+03 Z (km): 0.4114495361832E+04 and planetodetic coordinates Longitude (deg): -4.2526283911759 Latitude (deg): 40.4242990309862 Altitude (km): 0.8190819258363E+00 These planetodetic coordinates are expressed relative to a reference spheroid having the dimensions Equatorial radius (km): 6.3781370000000E+03 Polar radius (km): 6.3567523142478E+03 All of the above coordinates are relative to the frame EARTH_FIXED. \begindata FRAME_DSS-55_TOPO = 1399055 FRAME_1399055_NAME = 'DSS-55_TOPO' FRAME_1399055_CLASS = 4 FRAME_1399055_CLASS_ID = 1399055 FRAME_1399055_CENTER = 399055 OBJECT_399055_FRAME = 'DSS-55_TOPO' TKFRAME_1399055_RELATIVE = 'EARTH_FIXED' TKFRAME_1399055_SPEC = 'ANGLES' TKFRAME_1399055_UNITS = 'DEGREES' TKFRAME_1399055_AXES = ( 3, 2, 3 ) TKFRAME_1399055_ANGLES = ( -355.7473716088242, -49.5757009690138, 180.0000000000000 ) \begintext Topocentric frame DSS-56_TOPO The Z axis of this frame points toward the zenith. The X axis of this frame points North. Topocentric frame DSS-56_TOPO is centered at the site DSS-56, which at the epoch 2020 OCT 23 00:00:00.000 TDB has Cartesian coordinates X (km): 0.4849421500903E+04 Y (km): -0.3605492280048E+03 Z (km): 0.4114647264832E+04 and planetodetic coordinates Longitude (deg): -4.2520557858121 Latitude (deg): 40.4259678122023 Altitude (km): 0.8357671690735E+00 These planetodetic coordinates are expressed relative to a reference spheroid having the dimensions Equatorial radius (km): 6.3781370000000E+03 Polar radius (km): 6.3567523142478E+03 All of the above coordinates are relative to the frame EARTH_FIXED. \begindata FRAME_DSS-56_TOPO = 1399056 FRAME_1399056_NAME = 'DSS-56_TOPO' FRAME_1399056_CLASS = 4 FRAME_1399056_CLASS_ID = 1399056 FRAME_1399056_CENTER = 399056 OBJECT_399056_FRAME = 'DSS-56_TOPO' TKFRAME_1399056_RELATIVE = 'EARTH_FIXED' TKFRAME_1399056_SPEC = 'ANGLES' TKFRAME_1399056_UNITS = 'DEGREES' TKFRAME_1399056_AXES = ( 3, 2, 3 ) TKFRAME_1399056_ANGLES = ( -355.7479442141879, -49.5740321877977, 180.0000000000000 ) \begintext Topocentric frame DSS-63_TOPO The Z axis of this frame points toward the zenith. The X axis of this frame points North. Topocentric frame DSS-63_TOPO is centered at the site DSS-63, which at the epoch 2020 OCT 23 00:00:00.000 TDB has Cartesian coordinates X (km): 0.4849092339903E+04 Y (km): -0.3601799170048E+03 Z (km): 0.4115109528832E+04 and planetodetic coordinates Longitude (deg): -4.2480036330327 Latitude (deg): 40.4312128778313 Altitude (km): 0.8648381805445E+00 These planetodetic coordinates are expressed relative to a reference spheroid having the dimensions Equatorial radius (km): 6.3781370000000E+03 Polar radius (km): 6.3567523142478E+03 All of the above coordinates are relative to the frame EARTH_FIXED. \begindata FRAME_DSS-63_TOPO = 1399063 FRAME_1399063_NAME = 'DSS-63_TOPO' FRAME_1399063_CLASS = 4 FRAME_1399063_CLASS_ID = 1399063 FRAME_1399063_CENTER = 399063 OBJECT_399063_FRAME = 'DSS-63_TOPO' TKFRAME_1399063_RELATIVE = 'EARTH_FIXED' TKFRAME_1399063_SPEC = 'ANGLES' TKFRAME_1399063_UNITS = 'DEGREES' TKFRAME_1399063_AXES = ( 3, 2, 3 ) TKFRAME_1399063_ANGLES = ( -355.7519963669673, -49.5687871221687, 180.0000000000000 ) \begintext Topocentric frame DSS-65_TOPO The Z axis of this frame points toward the zenith. The X axis of this frame points North. Topocentric frame DSS-65_TOPO is centered at the site DSS-65, which at the epoch 2020 OCT 23 00:00:00.000 TDB has Cartesian coordinates X (km): 0.4849339455903E+04 Y (km): -0.3604272327048E+03 Z (km): 0.4114751010832E+04 and planetodetic coordinates Longitude (deg): -4.2506939876788 Latitude (deg): 40.4272094906850 Altitude (km): 0.8338753136762E+00 These planetodetic coordinates are expressed relative to a reference spheroid having the dimensions Equatorial radius (km): 6.3781370000000E+03 Polar radius (km): 6.3567523142478E+03 All of the above coordinates are relative to the frame EARTH_FIXED. \begindata FRAME_DSS-65_TOPO = 1399065 FRAME_1399065_NAME = 'DSS-65_TOPO' FRAME_1399065_CLASS = 4 FRAME_1399065_CLASS_ID = 1399065 FRAME_1399065_CENTER = 399065 OBJECT_399065_FRAME = 'DSS-65_TOPO' TKFRAME_1399065_RELATIVE = 'EARTH_FIXED' TKFRAME_1399065_SPEC = 'ANGLES' TKFRAME_1399065_UNITS = 'DEGREES' TKFRAME_1399065_AXES = ( 3, 2, 3 ) TKFRAME_1399065_ANGLES = ( -355.7493060123212, -49.5727905093150, 180.0000000000000 ) \begintext Definitions file earthstns_fx_201023.cmt -------------------------------------------------------------------------------- SPK for DSN Station Locations ===================================================================== Original file name: earthstns_fx_201023.bsp Creation date: 2020 October 23 11:35 Created by: Nat Bachman (NAIF/JPL) Introduction ===================================================================== This file provides geocentric states---locations and velocities---for the set of DSN stations cited in the list below under "Position Data." Station position vectors point from the earth's barycenter to the stations. Station velocities are estimates of the derivatives with respect to time of these vectors; in this file, velocities are constant. Station velocities have magnitudes on the order of a few cm/year. The states in this file are given relative to the terrestrial reference frame ITRF93. In the interest of flexibility, in this file the reference frame is labeled with the alias 'EARTH_FIXED'. Any application using this file must map the alias 'EARTH_FIXED' to either 'ITRF93' or 'IAU_EARTH'. See the discussion below under "Reference frame alias" for details. This SPK file has a companion file earthstns_itrf93_201023.bsp which differs from this one only in that it uses the reference frame name 'ITRF93'. For high-accuracy work, the companion file is recommended (on the basis of ease of use). Revision description -------------------- This kernel contains data from a single, current source: [1]. This kernel supersedes the kernel earthstns_fx_050714.bsp The set of stations covered by this file has changed from that of the file earthstns_fx_050714.bsp as follows: Deleted stations (not present in current file): PARKES DSS-12 DSS-16 DSS-17 DSS-23 DSS-27 DSS-28 DSS-33 DSS-42 DSS-46 DSS-49 (alternate name for PARKES) DSS-61 DSS-64 (alternate name for DSS-65) DSS-66 Other deleted data: Position data for the old location of DSS-65 prior to 2005 July 3 TDB are no longer included. This file extrapolates current data backward in time for the entire time period covered by this file. The superseded file earthstns_fx_050714.bsp should be used to obtain the old location of DSS-65 for dates prior to 2005 July 3 TDB. Added stations: DSS-35 DSS-36 Name transfers---name now refers to a new station: DSS-53 Planned updates --------------- Updates will be be made to keep this file in sync with updates to the source document [1]. Values for DSS-53 are expected to be updated. Values for DSS-23 will be added. There is no schedule for these changes at this time. Using this kernel ===================================================================== Kernel loading -------------- In order for a SPICE-based program to make use of this kernel, the kernel must be loaded via the SPICE routine FURNSH. If you are running application software created by a third party, see the documentation for that software for instructions on kernel management. See also "Associated frame kernels" and "Associated PCK files" below. Users requiring data from superseded SPK versions can load those files in addition to this one. In the case of conflicting data, data from SPKs loaded later take precedence over SPKs loaded earlier. Reference frame alias --------------------- This kernel uses the alias 'EARTH_FIXED' to designate the reference frame relative to which the data in this kernel are specified. In order for this kernel to be usable, the alias must be mapped to the name of a supported terrestrial frame. For high-accuracy work, the frame name 'ITRF93' should be used. In some situations, for example when low accuracy, long term predictions are desired, it may be convenient to map 'EARTH_FIXED' to 'IAU_EARTH'. To map the alias, an application must load a text kernel containing assignments as shown below. begintext Map 'EARTH_FIXED' to ITRF93. (To map to IAU_EARTH, substitute 'IAU_EARTH' for 'ITRF93' below.) begindata TKFRAME_EARTH_FIXED_RELATIVE = 'ITRF93' TKFRAME_EARTH_FIXED_SPEC = 'MATRIX' TKFRAME_EARTH_FIXED_MATRIX = ( 1 0 0 0 1 0 0 0 1 ) begintext See the Frames Required Reading for details. Associated PCK files -------------------- For high-accuracy work, this kernel should be used together with a high-precision, binary earth PCK file. NAIF produces these kernels on a regular basis; they can be obtained via anonymous ftp from the NAIF server naif.jpl.nasa.gov or downloaded from the URL https://naif.jpl.nasa.gov/pub/naif/generic_kernels/pck/ The PCK is located in the path pub/naif/generic_kernels/pck The file name is of the form earth_000101_yymmdd_yymmdd.bpc The first two dates are the file's start and stop times; the third is the epoch of the last datum in the EOP file: data from this epoch forward are predicted. The file's coverage starts at a fixed date (currently chosen to be 2000 Jan. 1) and extends to the end of the predict region, which has a duration of roughly 3 months. The same location contains a file with identical contents and a fixed name: earth_latest_high_prec.bpc This file may be convenient for automated downloads. NAIF also provides a low-accuracy, long-term predict binary Earth PCK. See the file aareadme.txt in the location cited above for details. Associated frame kernels ------------------------ The frame kernel having (original) file name earth_topo_201023.tf defines topocentric reference frames associated with each of the stations covered by this file. That kernel supports computations such as finding the azimuth and elevation of a target as seen from a specified station. Data sources ===================================================================== All data presented here are from reference [1]. Reference Spheroid ------------------ The reference bi-axial spheroid is defined by an equatorial and a polar radius. Calling these Re and Rp respectively, the flattening factor f is defined as f = ( Re - Rp ) / Re For the reference spheroid used by this file, the equatorial radius Re and inverse flattening factor 1/f are Re = 6378137 m 1/f = 298.2572236 The reference spheroid is not used for the creation of this SPK file but is used to create the associated frame kernel named above. Epoch ----- The epoch associated with these data is given by the source as "2003.0." The time variation of the data is slow enough so that specification of the time system is unimportant. However, in the creation of this file, the epoch is assumed to be 2003 Jan 1 00:00:00 TDB At this epoch, the station positions are as given below. Position data ------------- Station locations in the ITRF93 frame at the specified epoch are: Antenna Diameter x (m) y (m) z (m) DSS 13 34m -2351112.659 -4655530.636 +3660912.728 DSS 14 70m -2353621.420 -4641341.472 +3677052.318 DSS 15 34m -2353538.958 -4641649.429 +3676669.984 {3} DSS 24 34m -2354906.711 -4646840.095 +3669242.325 DSS 25 34m -2355022.014 -4646953.204 +3669040.567 DSS 26 34m -2354890.797 -4647166.328 +3668871.755 DSS 34 34m -4461147.093 +2682439.239 -3674393.133 {1} DSS 35 34m -4461273.090 +2682568.925 -3674152.093 {1} DSS 36 34m -4461168.415 +2682814.657 -3674083.901 {1} DSS 43 70m -4460894.917 +2682361.507 -3674748.152 DSS 45 34m -4460935.578 +2682765.661 -3674380.982 {3} DSS 53 34m +4849339.965 -360658.246 +4114747.290 {2} DSS 54 34m +4849434.488 -360723.8999 +4114618.835 DSS 55 34m +4849525.256 -360606.0932 +4114495.084 DSS 56 34m +4849421.679 -360549.659 +4114646.987 DSS 63 70m +4849092.518 -360180.3480 +4115109.251 DSS 65 34m +4849339.634 -360427.6637 +4114750.733 Notes from [1]: {1} Position absolute accuracy estimated to be +/- 3cm (0.030m) (1-sigma) for each coordinate. {2} Position absolute accuracy estimated to be +/- 3m (3-sigma) for each coordinate. {3} Decommissioned. For historical reference only. Velocity data ------------- Station velocities in Cartesian coordinates, with respect to the ITRF93 frame, are shown below. Reference epoch for plate motion: 01-JAN-2003 00:00 Plate motion model, m/year X Y Z Goldstone: Stations numbered 1X & 2X -0.0180 0.0065 -0.0038 Canberra: Stations numbered 3X & 4X -0.0335 -0.0041 0.0392 Madrid: Stations numbered 5X & 6X -0.0100 0.0242 0.0156 Accuracy -------- Location uncertainties at the 1 sigma level, for cylindrical coordinates, are given by Table 7 of reference [1]. References ---------- The data provided here are taken from the DSN document [1] "301 Coverage and Geometry." DSN No. 810-005, 301, Rev. M Issue Date: September 04, 2020. JPL D-19379; CL#20-3996. URL: https://deepspace.jpl.nasa.gov/dsndocs/810-005/301/301M.pdf Documentation for the SPICE Toolkit software is available here: URL: https://naif.jpl.nasa.gov Kernel Data ===================================================================== begintext Station locations and velocities, along with topocentric reference frame specification parameters: begindata SITES += 'DSS-13' DSS-13_FRAME = 'EARTH_FIXED' DSS-13_CENTER = 399 DSS-13_IDCODE = 399013 DSS-13_EPOCH = @2003-JAN-01/00:00 DSS-13_BOUNDS = ( @1950-JAN-01/00:00, @2150-JAN-01/00:00 ) DSS-13_XYZ = ( -2351.112659 -4655.530636 +3660.912728 ) DSS-13_DXYZ = ( -0.0180 0.0065 -0.0038 ) DSS-13_TOPO_EPOCH = @2020-OCT-23/00:00 DSS-13_UP = 'Z' DSS-13_NORTH = 'X' SITES += 'DSS-14' DSS-14_FRAME = 'EARTH_FIXED' DSS-14_CENTER = 399 DSS-14_IDCODE = 399014 DSS-14_EPOCH = @2003-JAN-01/00:00 DSS-14_BOUNDS = ( @1950-JAN-01/00:00, @2150-JAN-01/00:00 ) DSS-14_XYZ = ( -2353.621420 -4641.341472 +3677.052318 ) DSS-14_DXYZ = ( -0.0180 0.0065 -0.0038 ) DSS-14_TOPO_EPOCH = @2020-OCT-23/00:00 DSS-14_UP = 'Z' DSS-14_NORTH = 'X' SITES += 'DSS-15' DSS-15_FRAME = 'EARTH_FIXED' DSS-15_CENTER = 399 DSS-15_IDCODE = 399015 DSS-15_EPOCH = @2003-JAN-01/00:00 DSS-15_BOUNDS = ( @1950-JAN-01/00:00, @2150-JAN-01/00:00 ) DSS-15_XYZ = ( -2353.538958 -4641.649429 +3676.669984 ) DSS-15_DXYZ = ( -0.0180 0.0065 -0.0038 ) DSS-15_TOPO_EPOCH = @2020-OCT-23/00:00 DSS-15_UP = 'Z' DSS-15_NORTH = 'X' SITES += 'DSS-24' DSS-24_FRAME = 'EARTH_FIXED' DSS-24_CENTER = 399 DSS-24_IDCODE = 399024 DSS-24_EPOCH = @2003-JAN-01/00:00 DSS-24_BOUNDS = ( @1950-JAN-01/00:00, @2150-JAN-01/00:00 ) DSS-24_XYZ = ( -2354.906711 -4646.840095 +3669.242325 ) DSS-24_DXYZ = ( -0.0180 0.0065 -0.0038 ) DSS-24_TOPO_EPOCH = @2020-OCT-23/00:00 DSS-24_UP = 'Z' DSS-24_NORTH = 'X' SITES += 'DSS-25' DSS-25_FRAME = 'EARTH_FIXED' DSS-25_CENTER = 399 DSS-25_IDCODE = 399025 DSS-25_EPOCH = @2003-JAN-01/00:00 DSS-25_BOUNDS = ( @1950-JAN-01/00:00, @2150-JAN-01/00:00 ) DSS-25_XYZ = ( -2355.022014 -4646.953204 +3669.040567 ) DSS-25_DXYZ = ( -0.0180 0.0065 -0.0038 ) DSS-25_TOPO_EPOCH = @2020-OCT-23/00:00 DSS-25_UP = 'Z' DSS-25_NORTH = 'X' SITES += 'DSS-26' DSS-26_FRAME = 'EARTH_FIXED' DSS-26_CENTER = 399 DSS-26_IDCODE = 399026 DSS-26_EPOCH = @2003-JAN-01/00:00 DSS-26_BOUNDS = ( @1950-JAN-01/00:00, @2150-JAN-01/00:00 ) DSS-26_XYZ = ( -2354.890797 -4647.166328 +3668.871755 ) DSS-26_DXYZ = ( -0.0180 0.0065 -0.0038 ) DSS-26_TOPO_EPOCH = @2020-OCT-23/00:00 DSS-26_UP = 'Z' DSS-26_NORTH = 'X' SITES += 'DSS-34' DSS-34_FRAME = 'EARTH_FIXED' DSS-34_CENTER = 399 DSS-34_IDCODE = 399034 DSS-34_EPOCH = @2003-JAN-01/00:00 DSS-34_BOUNDS = ( @1950-JAN-01/00:00, @2150-JAN-01/00:00 ) DSS-34_XYZ = ( -4461.147093 +2682.439239 -3674.393133 ) DSS-34_DXYZ = ( -0.0335 -0.0041 0.0392 ) DSS-34_TOPO_EPOCH = @2020-OCT-23/00:00 DSS-34_UP = 'Z' DSS-34_NORTH = 'X' SITES += 'DSS-35' DSS-35_FRAME = 'EARTH_FIXED' DSS-35_CENTER = 399 DSS-35_IDCODE = 399035 DSS-35_EPOCH = @2003-JAN-01/00:00 DSS-35_BOUNDS = ( @1950-JAN-01/00:00, @2150-JAN-01/00:00 ) DSS-35_XYZ = ( -4461.273090 +2682.568925 -3674.152093 ) DSS-35_DXYZ = ( -0.0335 -0.0041 0.0392 ) DSS-35_TOPO_EPOCH = @2020-OCT-23/00:00 DSS-35_UP = 'Z' DSS-35_NORTH = 'X' SITES += 'DSS-36' DSS-36_FRAME = 'EARTH_FIXED' DSS-36_CENTER = 399 DSS-36_IDCODE = 399036 DSS-36_EPOCH = @2003-JAN-01/00:00 DSS-36_BOUNDS = ( @1950-JAN-01/00:00, @2150-JAN-01/00:00 ) DSS-36_XYZ = ( -4461.168415 +2682.814657 -3674.083901 ) DSS-36_DXYZ = ( -0.0335 -0.0041 0.0392 ) DSS-36_TOPO_EPOCH = @2020-OCT-23/00:00 DSS-36_UP = 'Z' DSS-36_NORTH = 'X' SITES += 'DSS-43' DSS-43_FRAME = 'EARTH_FIXED' DSS-43_CENTER = 399 DSS-43_IDCODE = 399043 DSS-43_EPOCH = @2003-JAN-01/00:00 DSS-43_BOUNDS = ( @1950-JAN-01/00:00, @2150-JAN-01/00:00 ) DSS-43_XYZ = ( -4460.894917 +2682.361507 -3674.748152 ) DSS-43_DXYZ = ( -0.0335 -0.0041 0.0392 ) DSS-43_TOPO_EPOCH = @2020-OCT-23/00:00 DSS-43_UP = 'Z' DSS-43_NORTH = 'X' SITES += 'DSS-45' DSS-45_FRAME = 'EARTH_FIXED' DSS-45_CENTER = 399 DSS-45_IDCODE = 399045 DSS-45_EPOCH = @2003-JAN-01/00:00 DSS-45_BOUNDS = ( @1950-JAN-01/00:00, @2150-JAN-01/00:00 ) DSS-45_XYZ = ( -4460.935578 +2682.765661 -3674.380982 ) DSS-45_DXYZ = ( -0.0335 -0.0041 0.0392 ) DSS-45_TOPO_EPOCH = @2020-OCT-23/00:00 DSS-45_UP = 'Z' DSS-45_NORTH = 'X' SITES += 'DSS-53' DSS-53_FRAME = 'EARTH_FIXED' DSS-53_CENTER = 399 DSS-53_IDCODE = 399053 DSS-53_EPOCH = @2003-JAN-01/00:00 DSS-53_BOUNDS = ( @1950-JAN-01/00:00, @2150-JAN-01/00:00 ) DSS-53_XYZ = ( +4849.339965 -360.658246 +4114.747290 ) DSS-53_DXYZ = ( -0.0100 0.0242 0.0156 ) DSS-53_TOPO_EPOCH = @2020-OCT-23/00:00 DSS-53_UP = 'Z' DSS-53_NORTH = 'X' SITES += 'DSS-54' DSS-54_FRAME = 'EARTH_FIXED' DSS-54_CENTER = 399 DSS-54_IDCODE = 399054 DSS-54_EPOCH = @2003-JAN-01/00:00 DSS-54_BOUNDS = ( @1950-JAN-01/00:00, @2150-JAN-01/00:00 ) DSS-54_XYZ = ( +4849.434488 -360.7238999 +4114.618835 ) DSS-54_DXYZ = ( -0.0100 0.0242 0.0156 ) DSS-54_TOPO_EPOCH = @2020-OCT-23/00:00 DSS-54_UP = 'Z' DSS-54_NORTH = 'X' SITES += 'DSS-55' DSS-55_FRAME = 'EARTH_FIXED' DSS-55_CENTER = 399 DSS-55_IDCODE = 399055 DSS-55_EPOCH = @2003-JAN-01/00:00 DSS-55_BOUNDS = ( @1950-JAN-01/00:00, @2150-JAN-01/00:00 ) DSS-55_XYZ = ( +4849.525256 -360.6060932 +4114.495084 ) DSS-55_DXYZ = ( -0.0100 0.0242 0.0156 ) DSS-55_TOPO_EPOCH = @2020-OCT-23/00:00 DSS-55_UP = 'Z' DSS-55_NORTH = 'X' SITES += 'DSS-56' DSS-56_FRAME = 'EARTH_FIXED' DSS-56_CENTER = 399 DSS-56_IDCODE = 399056 DSS-56_EPOCH = @2003-JAN-01/00:00 DSS-56_BOUNDS = ( @1950-JAN-01/00:00, @2150-JAN-01/00:00 ) DSS-56_XYZ = ( +4849.421679 -360.549659 +4114.646987 ) DSS-56_DXYZ = ( -0.0100 0.0242 0.0156 ) DSS-56_TOPO_EPOCH = @2020-OCT-23/00:00 DSS-56_UP = 'Z' DSS-56_NORTH = 'X' SITES += 'DSS-63' DSS-63_FRAME = 'EARTH_FIXED' DSS-63_CENTER = 399 DSS-63_IDCODE = 399063 DSS-63_EPOCH = @2003-JAN-01/00:00 DSS-63_BOUNDS = ( @1950-JAN-01/00:00, @2150-JAN-01/00:00 ) DSS-63_XYZ = ( +4849.092518 -360.1803480 +4115.109251 ) DSS-63_DXYZ = ( -0.0100 0.0242 0.0156 ) DSS-63_TOPO_EPOCH = @2020-OCT-23/00:00 DSS-63_UP = 'Z' DSS-63_NORTH = 'X' SITES += 'DSS-65' DSS-65_FRAME = 'EARTH_FIXED' DSS-65_CENTER = 399 DSS-65_IDCODE = 399065 DSS-65_EPOCH = @2003-JAN-01/00:00 DSS-65_BOUNDS = ( @1950-JAN-01/00:00, @2150-JAN-01/00:00 ) DSS-65_XYZ = ( +4849.339634 -360.4276637 +4114.750733 ) DSS-65_DXYZ = ( -0.0100 0.0242 0.0156 ) DSS-65_TOPO_EPOCH = @2020-OCT-23/00:00 DSS-65_UP = 'Z' DSS-65_NORTH = 'X' begintext begintext [End of definitions file]