KPL/IK AOST Instrument kernel =========================================================================== This instrument kernel (I-kernel) contains Phobos-Soil Fourier Spectrometer (AOST) optics, detector, and FOV parameters. Version and Date --------------------------------------------------------------------------- The TEXT_KERNEL_ID stores version information of loaded project text kernels. Each entry associated with the keyword is a string that consists of four parts: the kernel name, version, entry date, and type. For example, the TSNS I-kernel might have an entry as follows: TEXT_KERNEL_ID += 'PHSRM_AOST V0.0.0 20-AUGUST-2009 IK' | | | | | | | | KERNEL NAME <-------+ | | | | | V VERSION <-------+ | KERNEL TYPE | V ENTRY DATE TSNS I-Kernel Version: \begindata TEXT_KERNEL_ID += 'PHSRM_AOST V0.0.0 13-AUGUST-2009 IK' \begintext Version 0.0.0 -- 14-SEPTEMBER-2009 -- Anton Ledkov/IKI Initial version. References --------------------------------------------------------------------------- 1. ``Frames Required Reading'' 2. ``Kernel Pool Required Reading'' 3. ``GETFOV Header'' 4. Phobos - soil Frames Definition Kernel (FK). 5. AOST Geometry Document, Draft Version 00,August 2009 Contact Information ---------------------------------------------------------- Direct questions, comments or concerns about the contents of this kernel to: Anton Ledkov, IKI, (495)-333-1266, aledkov@iki.rssi.ru 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 also be used if the file contains instrument field-of-view (FOV) specifications. See [1] 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 PHSRM instrument ID code, constructed using the spacecraft ID number, -555, followed by the three digit ID number for AOST detector: eclipse (ECL)- 130, or atmosphere (ATM)- 140, surface (SUR)- 150. These IDs are defined in [4] as follows: Instrument name ID -------------------- ------ PHSRM_AOST_BASE -555100 PHSRM_AOST_SCANNER -555110 PHSRM_AOST_OPTICS -555120 PHSRM_AOST_ECL -555130 PHSRM_AOST_ATM -555140 PHSRM_AOST_SUR -555150 The remainder of the keyword is an underscore character followed by the unique name of the data item. For example, the number of pixels of the SWC is specified by INS-555130_NUMBER_OF_PIXELS The upper bound on the length of all keywords is 32 characters. If a keyword is included in more then one file, or if the same keyword appears more than once within a single file, the last assignment supersedes any earlier assignments. Instrument view -------------------------------------------------------- From [5] : AOST is a Fourier Spectrometer. Determination of elemental and isotopic composition of secondary ions generated from the surface of Phobos by the action of the primary ions of solar wind. AOST is capable of investigating both the atmospheric and surface properties of Mars, as well as the interaction between the two. The primary scientific objectives include: - Three dimensional modelling of the current Martian climate, including physical and chemical parameters, and mapping of circulation features throughout the Mars Phobos - soil mission. - Mapping seasonal variations of the atmosphere and the thermal properties of the Martian surface - Constraining the mineralogical properties of the surface layer of Mars Mounting Alignment -------------------------------------------------------- Refer to the latest version of the Phobos - soil Frames Definition Kernel (FK) [4] for the AOST reference frame definitions and mounting alignment information. Optics and Detector Parameters -------------------------------------------------------- This section contains assignments specifying the AOST ECL, ATM and SUR optics and detector parameters. The following AOST ECL, ATM and SUR optical and detector shape/size parameters are included in the data section below, taken from [3] (nominal values) and [5] (actual values): ----------------------------------------------------------------- parameter ECL ATM SUR ----------------------------------------------------------------- Focal Length, mm 52.0 52.0 52.0 Detector shape circle circle circle Detector size, mm 2.288 2.288 2.288 Number of pixels 1 1 1 IFOV, rad/pixel nominal 0.044 0.044 0.044 actual (FWHM) 0.044 0.044 0.044 ----------------------------------------------------------------- These values are provided in the assignments below, with the same units as in the table. \begindata INS-555130_FOCAL_LENGTH = ( 52.0 ) INS-555130_DETECTOR_SIZE = ( 2.288 ) INS-555130_NUMBER_OF_PIXELS = ( 1 ) INS-555130_IFOV = ( 0.044 ) INS-555140_FOCAL_LENGTH = ( 52.0 ) INS-555140_DETECTOR_SIZE = ( 2.288 ) INS-555140_NUMBER_OF_PIXELS = ( 1 ) INS-555140_IFOV = ( 0.044 ) INS-555150_FOCAL_LENGTH = ( 52.0 ) INS-555150_DETECTOR_SIZE = ( 2.288 ) INS-555150_NUMBER_OF_PIXELS = ( 1 ) INS-555150_IFOV = ( 0.044 ) \begintext FOV Definitions --------------------------------------------------------------------------- This section contains assignments defining the AOST ECL, ATM and SUR FOVs. These definitions are based on the AOST detector and optics parameters provided in the previous section and are provided in a format consistent with/required by the SPICE (CSPICE) function GETFOV (getfov_c). \begindata INS-555130_FOV_FRAME = 'PHSRM_AOST_ECL' INS-555130_FOV_SHAPE = 'CIRCLE' INS-555130_BORESIGHT = ( -1 0 0 ) INS-555130_FOV_CLASS_SPEC = 'ANGLES' INS-555130_FOV_REF_VECTOR = ( 0 0 1 ) INS-555130_FOV_REF_ANGLE = ( 0.022 ) INS-555130_FOV_ANGLE_UNITS = 'RADIANS' INS-555140_FOV_FRAME = 'PHSRM_AOST_ATM' INS-555140_FOV_SHAPE = 'CIRCLE' INS-555140_BORESIGHT = ( -1 0 0 ) INS-555140_FOV_CLASS_SPEC = 'ANGLES' INS-555140_FOV_REF_VECTOR = ( 0 0 1 ) INS-555140_FOV_REF_ANGLE = ( 0.022 ) INS-555140_FOV_ANGLE_UNITS = 'RADIANS' INS-555150_FOV_FRAME = 'PHSRM_AOST_SUR' INS-555150_FOV_SHAPE = 'CIRCLE' INS-555150_BORESIGHT = ( -1 0 0 ) INS-555150_FOV_CLASS_SPEC = 'ANGLES' INS-555150_FOV_REF_VECTOR = ( 0 0 1 ) INS-555150_FOV_REF_ANGLE = ( 0.022 ) INS-555150_FOV_ANGLE_UNITS = 'RADIANS' \begintext Spectral Parameters --------------------------------------------------------------------------- This section contains assignments specifying AOST ECL, ATM and SUR spectral resolution parameters. The following AOST ECL, ATM and SUR spectral resolution parameters are included in the data section below, taken from [3] (nominal values) and [5] (actual values): ----------------------------------------------------------------- parameter ECL ATM SUR ----------------------------------------------------------------- Spectral range, microns nominal 2.5 - 25 5 - 25 2.5 - 6 actual 2.5 - 25 5 - 25 2.5 - 6 Number of spectral bins 16384 8192 2048 ----------------------------------------------------------------- These values are provided in the assignments below, with the same units as in the table. \begindata INS-555130_SPECTRAL_RANGE = ( 2.5, 25 ) INS-555130_NUMBER_OF_BINS = ( 16384 ) INS-555140_SPECTRAL_RANGE = ( 5, 25 ) INS-555140_NUMBER_OF_BINS = ( 8192 ) INS-555150_SPECTRAL_RANGE = ( 2.5, 6 ) INS-555150_NUMBER_OF_BINS = ( 2048 ) \begintext End of IK file.