KPL/IK HP3 Radiometer Instrument Kernel ============================================================================== This instrument kernel (I-kernel) contains Field-Of-View (FOV) and other geometric parameter definitions for the INSIGHT HP3 Radiometer instrument. Version and Date ---------------------------------------------------------- Version 0.4 -- May 21, 2019 -- Boris Semenov, JPL Re-structured and re-wrapped comments. Removed non-printing characters. Changed frame name to INSIGHT_HP3_RAD. No changes to the data. Version 0.3 -- month day, year -- Nils Mueller, DLR Refined FOVs as polygons derived from circular FOV. Version 0.2 -- month day, year -- Nils Mueller, DLR Defined FOVs as follows: FOV 1: Elevation - 55deg (below horizon) Azimuth -20deg (west of nominal north, see frame kernel insight_dlr_v02.TF), Maximum FOV width : 20 deg (+/- 10 Grad) FOV 2: Elevation - 25deg (below horizon) Azimuth -20deg (west of nominal north) Maximum FOV width : 20 deg Version 0.1 -- month day, year -- Klaus-Dieter Matz, DLR Initial Version. References ---------------------------------------------------------- 1. ``Kernel Pool Required Reading'' 2. ``Frames Required Reading'' Contact Information ---------------------------------------------------------- Klaus-Dieter Matz, DLR, Klaus-Dieter.Matz@dlr.de Nils.Mueller, DLR, Nils.Mueller@dlr.de Implementation Notes ---------------------------------------------------------- This file is used by the SPICE system as follows: programs that make use of this kernel must ``load'' the kernel, normally during program initialization. The SPICE routine FURNSH loads a kernel file into the pool as shown below. CALL FURNSH ( 'frame_kernel_name; ) -- FORTRAN furnsh_c ( "frame_kernel_name" ); -- C cspice_furnsh, frame_kernel_name -- IDL cspice_furnsh( 'frame_kernel_name' ) -- MATLAB Once the file has been loaded, the SPICE routine GETFOV (getfov_c in C, cspice_getfov in IDL and MATLAB) can be used to retrieve FOV parameters for a given instrument or structure. This file was created and may be updated with a text editor or word processor. Conventions for Specifying Data ---------------------------------------------------------- All names referencing values in this I-kernel start with the characters `INS' followed by the NAIF ID code for the particular instrument detector: INSIGHT_HP3_RAD -189800 INSIGHT_HP3_RAD_NEAR -189801 INSIGHT_HP3_RAD_FAR -189802 INSIGHT_HP3_RAD_TEM -189810 The remainder of the name is an underscore character followed by the unique name of the data item. For example, the RAD NEAR boresight direction is specified by: INS-189801_BORESIGHT The upper bound on the length of the name of any data item is 32 characters. If the same item is included in more than one file, or if the same item appears more than once within a single file, the latest value supersedes any earlier values. Instrument Description ---------------------------------------------------------- From [TBD]: TBD. Mounting Alignment ---------------------------------------------------------- Refer to the latest version of the INSIGHT Mission Frames Definition Kernel (FK) for reference frame definitions and mounting alignment information. HP3 Radiometer Field of View Parameters ---------------------------------------------------------- Nominally both HP3 Radiometer channels have circular FOVs: ------------ --------------------------- Detector Diameter ------------ --------------------------- HP3_RAD_NEAR 20.0 degrees = 0.349066 rad HP3_RAD_FAR 20.0 degrees = 0.349066 rad ------------ --------------------------- HP3_RAD_NEAR points 55 degrees down from the horizon, HP3_RAD_FAR points 25 degrees down from the horizon. On a flat plane this would mean the boresights intersect the surface in 0.70 meters and 2.14 meters distance resp., assuming the nominal position of HP3_RAD 1 meter above the surface. The reference frame INSIGHT_HP3_RAD with respect to which these view directions are defined has the +Z axis pointing in the middle, 40 degrees down from the horizon. The circular FOV is partly obscured by the calibration towards nadir and horizon. Defined here as a polygon derived from a circular FOV with the upper and lower vectors omitted, so that the ratio of the angular width of the first (height) and second (width) components corresponds to the height and width of the RAD aperture. \begindata INS-189801_IFOV = 0.349066 INS-189801_FOV_FRAME = 'INSIGHT_HP3_RAD' INS-189801_FOV_SHAPE = 'POLYGON' INS-189801_BORESIGHT = ( -0.259, 0.0, 0.966 ) INS-189801_FOV_BOUNDARY_CORNERS = ( -0.14657985 0.13376229 0.98011327 -0.17066205 0.15122040 0.97365648 -0.19730651 0.16408375 0.96651268 -0.22570369 0.17196149 0.95889896 -0.25499076 0.17461427 0.95104665 -0.28427780 0.17196149 0.94319433 -0.31267497 0.16408375 0.93558061 -0.33931944 0.15122040 0.92843676 -0.36340165 0.13376230 0.92197996 -0.36340165 -0.13376229 0.92197996 -0.33931947 -0.15122040 0.92843676 -0.31267500 -0.16408373 0.93558055 -0.28427780 -0.17196149 0.94319433 -0.25499076 -0.17461427 0.95104665 -0.22570370 -0.17196149 0.95889896 -0.19730651 -0.16408375 0.96651268 -0.17066205 -0.15122040 0.97365648 -0.14657986 -0.13376230 0.98011327 ) INS-189802_IFOV = 0.349066 INS-189802_FOV_FRAME = 'INSIGHT_HP3_RAD' INS-189802_FOV_SHAPE = 'POLYGON' INS-189802_BORESIGHT = ( 0.259, 0.0, 0.966 ) INS-189802_FOV_BOUNDARY_CORNERS = ( 0.14657985 -0.13376229 0.98011327 0.17066205 -0.15122040 0.97365648 0.19730651 -0.16408375 0.96651268 0.22570369 -0.17196149 0.95889896 0.25499076 -0.17461427 0.95104665 0.28427780 -0.17196149 0.94319433 0.31267497 -0.16408375 0.93558061 0.33931944 -0.15122040 0.92843676 0.36340165 -0.13376230 0.92197996 0.36340165 0.13376229 0.92197996 0.33931947 0.15122040 0.92843676 0.31267500 0.16408373 0.93558055 0.28427780 0.17196149 0.94319433 0.25499076 0.17461427 0.95104665 0.22570370 0.17196149 0.95889896 0.19730651 0.16408375 0.96651268 0.17066205 0.15122040 0.97365648 0.14657986 0.13376230 0.98011327 ) \begintext HP3 Radiometer Detector Parameters ---------------------------------------------------------- Both HP3 Radiometer detectors may be considered as single pixel instruments. \begindata INS-189801_FOV_CENTER_PIXEL = ( 0, 0 ) INS-189801_PIXEL_SAMPLES = ( 1 ) INS-189801_PIXEL_LINES = ( 1 ) INS-189802_FOV_CENTER_PIXEL = ( 0, 0 ) INS-189802_PIXEL_SAMPLES = ( 1 ) INS-189802_PIXEL_LINES = ( 1 ) \begintext End of IK file.