KPL/IK Juno JUNOCAM Instrument Kernel =============================================================================== This Instrument Kernel (IK) file contains optics and detector parameters and FOV definitions for the JUNO Camera (JUNOCAM) instrument. Version and Date ------------------------------------------------------------------------------- Version 0.0 -- June 9, 2009 -- Boris Semenov, NAIF Initial Release. References ------------------------------------------------------------------------------- 1. Kernel Pool Required Reading 2. GETFOV, getfoc_c, cspice_getfov headers 3. JUNO FK file, latest version 4. JUNOCAM CDR Presentations Contact Information ------------------------------------------------------------------------------- Boris V. Semenov, NAIF/JPL, (818)-354-8136, Boris.Semenov@jpl.nasa.gov 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. Naming Conventions ---------------------------------------------------------- All names referencing values in this IK file start with the characters `INS' followed by the NAIF JUNO spacecraft ID number (-61) followed by a NAIF three digit ID code for the camera or one of its spectral bands. This is the full list of names and IDs for the camera and spectral bands described by this IK file: JUNO_JUNOCAM -61500 JUNO_JUNOCAM_BLUE -61501 JUNO_JUNOCAM_GREEN -61502 JUNO_JUNOCAM_RED -61503 JUNO_JUNOCAM_METHANE -61504 The remainder of the keyword name is an underscore character followed by the unique name of the data item. For example, the JUNOCAM "blue" band boresight direction in the JUNO_JUNOCAM frame is specified by: INS-61501_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 --------------------------------------------------------- TBD Mounting Alignment -------------------------------------------------------- Refer to the latest version of the Juno Frames Definition Kernel (FK) [3] for the JUNOCAM frame definitions and mounting alignment information. Apparent FOV Layout -------------------------------------------------------- TBD; the diagram below is a placeholder; to be updated when actual FOV/CCD layout information is available. The diagram below illustrates the JUNOCAM camera FOV/CCD layout: --- 0,0--------------------------------------------. 4.64 deg | BLUE 128 pix * | -------- --- `-----------------------------------------1600,128 | 233 pixels 27 pix | --- 0,0--------------------------------------------. | 4.64 deg | GREEN 128 pix * | | --- --- `-----------------------------------------1600,128 | |78 pixels 27 pix +Zjc x-------------> +Xjc --- --- --- 0,0---------------------|----------------------. | |78 pixels 4.64 deg | RED 128 pix * | | --- --- `----------------------|------------------1600,128 | 27 pix | | --- 0,0---------------------|----------------------. | 307 pixels | 278 pix | | | 10.1 deg | * | -------- | METHANE | | --- `----------------------|------------------1600,278 | V +Yjc | Spin direction V | 58 deg | Boresight |---------------------------------------------| (+Zjc axis) | | is into the page Optical and Detector Parameters -------------------------------------------------------- This section provides two parameters that, in combination with the optical distortion and filter parameters, are needed to compute the view directions of the individual CCD pixels. These parameters are the focal length and pixel size, both given in millimeters. \begindata INS-61500_FOCAL_LENGTH = ( 11.7 ) INS-61500_PIXEL_SIZE = ( 0.0074 ) \begintext FOV Definition -------------------------------------------------------- TBD; the FOV definitions below are placeholders; to be updated when actual FOV/CCD layout information is available. This section contains definitions for the JUNOCAM band FOVs. All FOVs are defined as rectangular pyramids using boundary vectors consistent with the information provided in the "Apparent FOV Layout" section above. \begindata INS-61501_FOV_FRAME = 'JUNO_JUNOCAM' INS-61501_FOV_SHAPE = 'RECTANGLE' INS-61501_BORESIGHT = ( 0.00000000 -0.14688455 0.98915364 ) INS-61501_FOV_BOUNDARY_CORNERS = ( -0.48442137 -0.16840441 0.85847300 0.48442137 -0.16840441 0.85847300 0.48442137 -0.08831974 0.87036519 -0.48442137 -0.08831974 0.87036519 ) INS-61502_FOV_FRAME = 'JUNO_JUNOCAM' INS-61502_FOV_SHAPE = 'RECTANGLE' INS-61502_BORESIGHT = ( 0.00000000 -0.04933018 0.99878253 ) INS-61502_FOV_BOUNDARY_CORNERS = ( -0.48442137 -0.08354165 0.87083680 0.48442137 -0.08354165 0.87083680 0.48442137 -0.00267740 0.87483071 -0.48442137 -0.00267740 0.87483071 ) INS-61503_FOV_FRAME = 'JUNO_JUNOCAM' INS-61503_FOV_SHAPE = 'RECTANGLE' INS-61503_BORESIGHT = ( 0.00000000 0.04933018 0.99878253 ) INS-61503_FOV_BOUNDARY_CORNERS = ( -0.48442137 0.00267740 0.87483071 0.48442137 0.00267740 0.87483071 0.48442137 0.08354165 0.87083680 -0.48442137 0.08354165 0.87083680 ) INS-61504_FOV_FRAME = 'JUNO_JUNOCAM' INS-61504_FOV_SHAPE = 'RECTANGLE' INS-61504_BORESIGHT = ( 0.00000000 0.19301828 0.98119516 ) INS-61504_FOV_BOUNDARY_CORNERS = ( -0.48294513 0.08198457 0.87180418 0.48294513 0.08198457 0.87180418 0.48294513 0.25434382 0.83789810 -0.48294513 0.25434382 0.83789810 ) \begintext Optical Distortion -------------------------------------------------------- TBD; to be based on MRO/MARCI Filters -------------------------------------------------------- TBD; to be based on MRO/MARCI A Recipe for Computing Observation Time and CCD Pixel View Direction -------------------------------------------------------------------- TBD; to be based on MRO/MARCI End of the IK file.