KPL/IK DIM Instrument kernel =========================================================================== This instrument kernel (I-kernel) contains Rosetta Lander Dust Impact Monitor (DIM) detector and field-of-view parameters. Version and Date --------------------------------------------------------------------------- Version 1.0 -- August 21, 2014 -- Maud Barthelemy, ESA/ESAC Boris Semenov, JPL Initial release. References --------------------------------------------------------------------------- 1. Rosetta Frames Definition Kernel (FK), latest version. 2. ''Kernel Pool Required Reading'' 3. http://www.mps.mpg.de/2714344/DIM Implementation Notes -------------------------------------------------------- Applications that need SPICE I-kernel data must load the I-kernel file, normally during program initialization. Loading the kernel using the SPICELIB routine FURNSH causes the data items and their associated values present in the kernel to become associated with a data structure called the kernel pool. The application program may then obtain the value(s) for any IK data item using the SPICELIB routines GDPOOL, GIPOOL, GCPOOL. Routine GETFOV may be used if the file contains instrument field-of-view (FOV) specification. See [2] for details. This file was created with, and can be updated with a text editor or word processor. Conventions for Specifying Data -------------------------------------------------------- Data items are specified using ``keyword=value'' assignments [1]. All keywords referencing values in this I-kernel start with the characters `INS' followed by the NAIF Rosetta instrument ID code, constructed using the spacecraft ID number (-226) followed by the NAIF three digit ID number for DIM P (1 to 7). These IDs are defined in [1] as follows: Instrument name ID -------------------- ------- ROS_LANDER_DIM_X -226830 ROS_LANDER_DIM_Y -226831 ROS_LANDER_DIM_Z -226832 The remainder of the keyword is an underscore character followed by the unique name of the data item. For example, the boresight of the DIM X detector is specified by INS-226830_BORESIGHT The upper bound on the length of all keywords is 32 characters. If a keyword is included in more than one file, or if the same keyword appears more than once within a single file, the last assignment supersedes any earlier assignments. Overview -------------------------------------------------------- From [3]: "The Dust Impact Monitor (DIM) on board the lander Philae measures the dust and ice particles escaping from the surface of the comet~s nucleus. These particles are detected when impacting on the surface of the cube-shaped DIM-sensor. DIM is one of three sub-instruments that constitute the instrument package SESAME on board Rosetta~s lander Philae." "The cube-shaped DIM-sensor located on the top side of Philae detects with piezoelectric plates the particles impacting from three different directions. In this way it is possible to measure both the particles returning to the surface under the influence of gravity and those ejected directly from the comet~s surface." Mounting Alignment -------------------------------------------------------- Refer to the latest version of the Rosetta Frames Definition Kernel (FK) [1] for the DIM reference frame definitions and mounting alignment information. FOV Definitions --------------------------------------------------------------------------- This section contains definitions for the DIM detector FOVs. These definitions are provided in the format required by the SPICE (CSPICE) function GETFOV (getfov_c). The DIM detector FOVs are defined with respect to the corresponding ROS_LANDER_DIM_ frames to be cones with the half angular extent of 89.9 degrees and the boresight along the +Z axis of the ROS_LANDER_DIM_ corresponding frame. These FOV definitions use angular extent style specification. \begindata INS-226830_FOV_FRAME = 'ROS_LANDER_DIM_X' INS-226830_FOV_SHAPE = 'CIRCLE' INS-226830_BORESIGHT = ( 0.0, 0.0, 1.0 ) INS-226830_FOV_CLASS_SPEC = 'ANGLES' INS-226830_FOV_REF_VECTOR = ( 1.0, 0.0, 0.0 ) INS-226830_FOV_REF_ANGLE = 89.9 INS-226830_FOV_ANGLE_UNITS = 'DEGREES' INS-226831_FOV_FRAME = 'ROS_LANDER_DIM_Y' INS-226831_FOV_SHAPE = 'CIRCLE' INS-226831_BORESIGHT = ( 0.0, 0.0, 1.0 ) INS-226831_FOV_CLASS_SPEC = 'ANGLES' INS-226831_FOV_REF_VECTOR = ( 1.0, 0.0, 0.0 ) INS-226831_FOV_REF_ANGLE = 89.9 INS-226831_FOV_ANGLE_UNITS = 'DEGREES' INS-226832_FOV_FRAME = 'ROS_LANDER_DIM_Z' INS-226832_FOV_SHAPE = 'CIRCLE' INS-226832_BORESIGHT = ( 0.0, 0.0, 1.0 ) INS-226832_FOV_CLASS_SPEC = 'ANGLES' INS-226832_FOV_REF_VECTOR = ( 1.0, 0.0, 0.0 ) INS-226832_FOV_REF_ANGLE = 89.9 INS-226832_FOV_ANGLE_UNITS = 'DEGREES' \begintext Platform ID --------------------------------------------------------------------------- This number is the NAIF instrument ID of the platform on which the detectors are mounted. For all detectors this platform is the lander. \begindata INS-226830_PLATFORM_ID = ( -226800 ) INS-226831_PLATFORM_ID = ( -226800 ) INS-226832_PLATFORM_ID = ( -226800 ) \begintext End of IK file.