KPL/IK MAVEN EUV Instrument Kernel =============================================================================== This Instrument Kernel (IK) file contains FOV parameters for the MAVEN EUV instrument. Version and Date ------------------------------------------------------------------------------- Version 1.0 -- April 15, 2015 -- Boris Semenov, NAIF References ------------------------------------------------------------------------------- 1. Kernel Pool Required Reading 2. GETFOV, getfoc_c, cspice_getfov headers 3. MAVEN FK file, latest version 4. MAVEN EUV MICD, MAVA0240699 5. MAVEN EUV PDS4 context product, version 1, urn:nasa:pds:context:instrument:euv.maven::1.0 Contact Information ------------------------------------------------------------------------------- Boris Semenov, NAIF, 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 MAVEN ID number (-202) followed by a NAIF three digit ID code for EUV or one of its detectors or components. This is the full list of names and IDs described by this IK file: MAVEN_EUV -202110 MAVEN_EUV-A -202111 MAVEN_EUV-B -202112 MAVEN_EUV-C -202113 The remainder of the keyword name is an underscore character followed by the unique name of the data item. For example, the -202113 boresight direction provided as a part of its FOV definition is specified by: INS-202113_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. Mounting Alignment -------------------------------------------------------- Refer to the latest version of the MAVEN Frames Definition Kernel (FK) [3] for the MAVEN structures reference frame definitions and mounting alignment information. Instrument Description --------------------------------------------------------- From [5]: The EUV monitor is designed to measure the solar irradiance in three broad bands in the soft xray and extreme ultraviolet wavelength range. It consists of three filter radiometers that each have a limiting aperture, bandpass limiting filter, silicon photodiode detector, and an electrometer to measure the current in the detector. A fourth detector-electrometer combination that is blocked from receiving any light input is used as a dark detector to monitor changes in the thermal and radiation induced background signals. A temperature diode is also included in the EUV instrument. There is also a mechanism to place or remove additional fused silica windows in front of the three science apertures. These filters block the EUV and X-ray sunlight, but still allow longer wavelength light (primarily visible) through into the radiometers. This allows for a measurement of the out-of-band contribution to the signals from the science channels. Instrument FOV Definition(s) ---------------------------------------------------------- This section defines the following FOVs: ID SHAPE FRAME SIZE1 SIZE2 BSIGHT ------- -------- --------------------- ----- ----- ------ -202111 CIRCLE MAVEN_EUV 4. 4. +Z -202112 CIRCLE MAVEN_EUV 4. 4. +Z -202113 CIRCLE MAVEN_EUV 4. 4. +Z The full extent FOV sizes in the table above are specified in degrees. The FOVs are defined in this data block. \begindata INS-202111_FOV_CLASS_SPEC = 'ANGLES' INS-202111_FOV_SHAPE = 'CIRCLE' INS-202111_FOV_FRAME = 'MAVEN_EUV' INS-202111_BORESIGHT = ( 0.0, 0.0, 1.0 ) INS-202111_FOV_REF_VECTOR = ( 1.0, 0.0, 0.0 ) INS-202111_FOV_REF_ANGLE = ( 2.0 ) INS-202111_FOV_ANGLE_UNITS = ( 'DEGREES' ) INS-202112_FOV_CLASS_SPEC = 'ANGLES' INS-202112_FOV_SHAPE = 'CIRCLE' INS-202112_FOV_FRAME = 'MAVEN_EUV' INS-202112_BORESIGHT = ( 0.0, 0.0, 1.0 ) INS-202112_FOV_REF_VECTOR = ( 1.0, 0.0, 0.0 ) INS-202112_FOV_REF_ANGLE = ( 2.0 ) INS-202112_FOV_ANGLE_UNITS = ( 'DEGREES' ) INS-202113_FOV_CLASS_SPEC = 'ANGLES' INS-202113_FOV_SHAPE = 'CIRCLE' INS-202113_FOV_FRAME = 'MAVEN_EUV' INS-202113_BORESIGHT = ( 0.0, 0.0, 1.0 ) INS-202113_FOV_REF_VECTOR = ( 1.0, 0.0, 0.0 ) INS-202113_FOV_REF_ANGLE = ( 2.0 ) INS-202113_FOV_ANGLE_UNITS = ( 'DEGREES' ) \begintext End of the IK file.