XMM FK files =========================================================================== This ``aareadme.txt'' file describes the contents of the kernels/fk directory of the XMM SPICE Kernel Dataset. It was last modified on February 24, 2023 by Ricardo Valles, ESAC/ESA. Brief Summary ------------------------------------------------------------------------ This directory contains the SPICE Frames Definition Kernel files for the XMM spacecraft, its structures, and science instruments, as well as for the Ground Earth Stations. Moreover, it contains frame definitions for science operations and for data analysis and scientific investigations. File naming conventions ------------------------------------------------------------------------ The following table provides information on which file contains which frames, their file naming conventions and some particular details: File Contents --------------------------- ----------------------------------------- estrack_vNN.tf ESA Ground Stations topocentric frames. earth_topo_050714.tf NASA DSN Ground Stations topocentric frames. xmm_vNN.tf XMM spacecraft frames. where NN version number -- two digits (required) If multiple versions of a Frames Kernel file are provided, always use the latest version (unless earlier version is needed for some special reasons.) Current FK Kernels Set ------------------------------------------------------------------------ estrack_vNN.tf SPICE FK file that provides topocentric frames for the ESA Ground Stations. Created by the ESA SPICE Service. earth_topo_050714.tf SPICE FK kernel for the topocentric reference frames for the Deep Space Network (DSN) stations. This kernel was released on the date indicated in the filename. xmm_vNN.tf SPICE FK file that provides XMM spacecraft frames. Created by the ESA SPICE Service. Other directory contents ------------------------------------------------------------------------ aareadme.txt This file. Kernel File Details ------------------------------------------------------------------------ The most detailed description of the data in an FK file is provided in metadata included inside the descriptive text areas of the file. This information can be viewed using any text editor. Contact Information ------------------------------------------------------------------------ If you have any questions regarding this file contact the ESA SPICE Service (ESS) at ESAC: Alfredo Escalante Lopez (+34) 91-8131-429 spice@sciops.esa.int References and required readings ------------------------------------------------------------------------ 1. ``Frames Required Reading'', NAIF Document 2. ``Kernel Pool Required Reading'', NAIF 3. ``C-Kernel Required Reading'', NAIF End of aareadme file.