KPL/IK GIADA Instrument kernel =========================================================================== This instrument kernel (I-kernel) contains GIADA parameters and field-of-view definition. Version and Date --------------------------------------------------------------------------- Version 1.1 -- March 3, 2008 -- Alessandro Aronica - References: update of reference n.5 - Overview: some values corrected in the table "Summary of Giada Characteristics" - Apparent FOV Layout: GDS and IS FOV layout modified according to the instrument structure - FOV Parameters: FOV angular size (deg and radians) swapped for GDS and IS according to the "new" FOV layout Version 1.0 -- March 15, 2005 -- Boris Semenov, NAIF/JPL Version number change for the first official release. Version 0.1 -- September 2, 2004 -- Boris Semenov, NAIF/JPL Filled in instrument overview section (copied from [6]). Version 0.0 -- September 2, 2004 -- Boris Semenov, NAIF/JPL Initial release. References --------------------------------------------------------------------------- 1. ``Kernel Pool Required Reading'' 2. ``C-kernel Required Reading'' 3. ``GIADA EID, Part B'', ROS-EST-RS-3009/EID B, 2001-05-15 4. Rosetta Frames Definition Kernel (FK), latest version. 5. ``GIADA FS Experiment User Manual'', RO-GIA-MA-007-I4, 2006-09-28 6. ESA Science and Technology Web Server, Rosetta Instruments Area, http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=35061 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 be used if the file contains instrument field-of-view (FOV) specification. 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 NAIF Rosetta instrument ID code, constructed using the spacecraft ID number (-226) followed by the NAIF three digit ID number for GIADA GDS (410), GIADA IS (420), or GIADA MBS 1..5 (431..435). The remainder of the keyword is an underscore character followed by the unique name of the data item. For example, the boresight of the GIADA GDS FOV is specified by INS-226410_BORESIGHT The upper bound on the length of all keywords is 32 characters. If a keyword is included in more than one file, or if the same keyword appears more than once within a single file, the last assignment supersedes any earlier assignments. Overview -------------------------------------------------------- From [5]: GIADA (Grain Impact Analyser and Dust Accumulator) will measure the scalar velocity, size and momentum of dust particles in the coma of the comet using an optical grain detection system and a mechanical grain impact sensor. Five microbalances will measure the amount of dust collected as the spacecraft orbits the comet. Summary of GIADA Characteristics Scalar velocity sensitivity (m s-1): 1 Measurable grain size (diameter, mkm): 30 Grain momentum sensitivity (kg m s-1): 6.5 x 10-10 Microbalance sensitivity (kg): 1 x 10-13 Mass (kg): 6.25 Dimensions (l x w x h, mm): 230 x 270 x 250 Power consumption (average, W): 20.7 Mounting Alignment -------------------------------------------------------- Refer to the latest version of the Rosetta Frames Definition Kernel (FK) [4] for the GIADA reference frame definitions and mounting alignment information. Apparent FOV Layout -------------------------------------------------------- This diagram illustrates the GIADA GDS and IS FOV layout in the corresponding reference frames. ^ | direction of | flight | ^ +Xis, +Xgds (down-track) | | ------- +---------|---------+ ^ | | GDS| | --- | +-----|-----+ | | ^ | | | IS| | 68 | | | | | | | deg | | 37 deg | | x-------------> +Yis, +Ygds (cross-track) | | | | +Zis | | | V | | +Zgds | | | --- | +-----------+ | V | | ------- +-------------------+ | | 37 deg | | | |<--------->| | | | | | | 68 deg | Boresight (+Z axis) |<----------------->| is into the page | | This diagram illustrates the GIADA MBS1..5 FOV layout in the corresponding GIADA MBS reference frame. ^ +Xmbs1..5 | | --- .__|__. ^ .' | `. | / | \ | . | . | 40 deg | x-------------> +Ymbs1..5 | . +Zmbs1..5 . | \ / v `. .' --- ` --- ' | 40 deg | Boresight (+Z axis) |<----------->| is into the page | | FOV Parameters -------------------------------------------------------- The following GIADA sensor particle entrance FOV parameters are included in the data section below, from [3]: ----------------------------------------------------------------- parameter GDS IS MBS 1..5 ----------------------------------------------------------------- Field of view (deg) Cross-track 68.0 37.0 40.0 Along-track 68.0 37.0 40.0 ----------------------------------------------------------------- The keywords below provide FOV angular size in radians, with the cross-track size being the first value and the along-track size being the second value in each pair. Since the FOV is just a single pixel IFOV is equal to the FOV in size and the pixel size parameters are set accordingly. \begindata INS-226410_FOV_ANGULAR_SIZE = ( 1.18682389, 1.18682389 ) INS-226410_IFOV = ( 1.18682389, 1.18682389 ) INS-226410_PIXEL_SAMPLES = ( 1 ) INS-226410_PIXEL_LINES = ( 1 ) INS-226410_CCD_CENTER = ( 0.5, 0.5 ) INS-226420_FOV_ANGULAR_SIZE = ( 0.64577182, 0.64577182 ) INS-226420_IFOV = ( 0.64577182, 0.64577182 ) INS-226420_PIXEL_SAMPLES = ( 1 ) INS-226420_PIXEL_LINES = ( 1 ) INS-226420_CCD_CENTER = ( 0.5, 0.5 ) INS-226431_FOV_ANGULAR_SIZE = ( 0.69813170, 0.69813170 ) INS-226431_IFOV = ( 0.69813170, 0.69813170 ) INS-226431_PIXEL_SAMPLES = ( 1 ) INS-226431_PIXEL_LINES = ( 1 ) INS-226431_CCD_CENTER = ( 0.5, 0.5 ) INS-226432_FOV_ANGULAR_SIZE = ( 0.69813170, 0.69813170 ) INS-226432_IFOV = ( 0.69813170, 0.69813170 ) INS-226432_PIXEL_SAMPLES = ( 1 ) INS-226432_PIXEL_LINES = ( 1 ) INS-226432_CCD_CENTER = ( 0.5, 0.5 ) INS-226433_FOV_ANGULAR_SIZE = ( 0.69813170, 0.69813170 ) INS-226433_IFOV = ( 0.69813170, 0.69813170 ) INS-226433_PIXEL_SAMPLES = ( 1 ) INS-226433_PIXEL_LINES = ( 1 ) INS-226433_CCD_CENTER = ( 0.5, 0.5 ) INS-226434_FOV_ANGULAR_SIZE = ( 0.69813170, 0.69813170 ) INS-226434_IFOV = ( 0.69813170, 0.69813170 ) INS-226434_PIXEL_SAMPLES = ( 1 ) INS-226434_PIXEL_LINES = ( 1 ) INS-226434_CCD_CENTER = ( 0.5, 0.5 ) INS-226435_FOV_ANGULAR_SIZE = ( 0.69813170, 0.69813170 ) INS-226435_IFOV = ( 0.69813170, 0.69813170 ) INS-226435_PIXEL_SAMPLES = ( 1 ) INS-226435_PIXEL_LINES = ( 1 ) INS-226435_CCD_CENTER = ( 0.5, 0.5 ) \begintext FOV Definitions --------------------------------------------------------------------------- This section contains definition for the GIADA FOV. This definition is provided in the format required by the SPICE (CSPICE) function GETFOV (getfov_c). The set of assignments in the data section below defines the GIADA FOVs with respect to the corresponding GIADA instrument frames as a rectangle (GDS and IS) or a circle (MBS1..5) of the size provided in the section above and the boresight along the +Z axis. \begindata INS-226410_FOV_FRAME = 'ROS_GIADA_GDS' INS-226410_FOV_SHAPE = 'RECTANGLE' INS-226410_BORESIGHT = ( 0.000000 0.000000 1.000000 ) INS-226410_FOV_CLASS_SPEC = 'ANGLES' INS-226410_FOV_REF_VECTOR = ( 1.000000 0.000000 0.000000 ) INS-226410_FOV_REF_ANGLE = ( 34.000 ) INS-226410_FOV_CROSS_ANGLE = ( 34.000 ) INS-226410_FOV_ANGLE_UNITS = 'DEGREES' INS-226420_FOV_FRAME = 'ROS_GIADA_IS' INS-226420_FOV_SHAPE = 'RECTANGLE' INS-226420_BORESIGHT = ( 0.000000 0.000000 1.000000 ) INS-226420_FOV_CLASS_SPEC = 'ANGLES' INS-226420_FOV_REF_VECTOR = ( 1.000000 0.000000 0.000000 ) INS-226420_FOV_REF_ANGLE = ( 18.500 ) INS-226420_FOV_CROSS_ANGLE = ( 18.500 ) INS-226420_FOV_ANGLE_UNITS = 'DEGREES' INS-226431_FOV_FRAME = 'ROS_GIADA_MBS1' INS-226431_FOV_SHAPE = 'CIRCLE' INS-226431_BORESIGHT = ( 0.000000 0.000000 1.000000 ) INS-226431_FOV_CLASS_SPEC = 'ANGLES' INS-226431_FOV_REF_VECTOR = ( 1.000000 0.000000 0.000000 ) INS-226431_FOV_REF_ANGLE = ( 20.000 ) INS-226431_FOV_ANGLE_UNITS = 'DEGREES' INS-226432_FOV_FRAME = 'ROS_GIADA_MBS2' INS-226432_FOV_SHAPE = 'CIRCLE' INS-226432_BORESIGHT = ( 0.000000 0.000000 1.000000 ) INS-226432_FOV_CLASS_SPEC = 'ANGLES' INS-226432_FOV_REF_VECTOR = ( 1.000000 0.000000 0.000000 ) INS-226432_FOV_REF_ANGLE = ( 20.000 ) INS-226432_FOV_ANGLE_UNITS = 'DEGREES' INS-226433_FOV_FRAME = 'ROS_GIADA_MBS3' INS-226433_FOV_SHAPE = 'CIRCLE' INS-226433_BORESIGHT = ( 0.000000 0.000000 1.000000 ) INS-226433_FOV_CLASS_SPEC = 'ANGLES' INS-226433_FOV_REF_VECTOR = ( 1.000000 0.000000 0.000000 ) INS-226433_FOV_REF_ANGLE = ( 20.000 ) INS-226433_FOV_ANGLE_UNITS = 'DEGREES' INS-226434_FOV_FRAME = 'ROS_GIADA_MBS4' INS-226434_FOV_SHAPE = 'CIRCLE' INS-226434_BORESIGHT = ( 0.000000 0.000000 1.000000 ) INS-226434_FOV_CLASS_SPEC = 'ANGLES' INS-226434_FOV_REF_VECTOR = ( 1.000000 0.000000 0.000000 ) INS-226434_FOV_REF_ANGLE = ( 20.000 ) INS-226434_FOV_ANGLE_UNITS = 'DEGREES' INS-226435_FOV_FRAME = 'ROS_GIADA_MBS5' INS-226435_FOV_SHAPE = 'CIRCLE' INS-226435_BORESIGHT = ( 0.000000 0.000000 1.000000 ) INS-226435_FOV_CLASS_SPEC = 'ANGLES' INS-226435_FOV_REF_VECTOR = ( 1.000000 0.000000 0.000000 ) INS-226435_FOV_REF_ANGLE = ( 20.000 ) INS-226435_FOV_ANGLE_UNITS = 'DEGREES' \begintext Platform ID --------------------------------------------------------------------------- This number is the NAIF instrument ID of the platform on which the instrument is mounted. For GIADA this platform is the spacecraft. \begindata INS-226410_PLATFORM_ID = ( -226000 ) INS-226420_PLATFORM_ID = ( -226000 ) INS-226431_PLATFORM_ID = ( -226000 ) INS-226432_PLATFORM_ID = ( -226000 ) INS-226433_PLATFORM_ID = ( -226000 ) INS-226434_PLATFORM_ID = ( -226000 ) INS-226435_PLATFORM_ID = ( -226000 ) \begintext