KPL/IK CONSERT Instrument kernel =========================================================================== This instrument kernel (I-kernel) contains CONSERT parameters and field-of-view definition. Version and Date --------------------------------------------------------------------------- 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 1, 2004 -- Boris Semenov, NAIF/JPL Initial release. References --------------------------------------------------------------------------- 1. ``Kernel Pool Required Reading'' 2. ``C-kernel Required Reading'' 3. ``CONSERT EID, Part B'', ROS-EST-RS-3007/EID B, 2001-02-15 4. Rosetta Frames Definition Kernel (FK), latest version. 5. ``CONSERT User Manual'', RO-OCN-TN-3044, 2002-10-17 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 CONSERT (160). The remainder of the keyword is an underscore character followed by the unique name of the data item. For example, the boresight of the CONSERT FOV is specified by INS-226160_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 [6]: CONSERT (Comet Nucleus Sounding Experiment by Radio wave Transmission) will perform tomography of the comet nucleus. CONSERT operates as a time domain transponder between one module which will land on the comet surface and another that will orbit the comet. A radio signal passes from the orbiting component of the instrument to the component on the comet surface and is then immediately transmitted back to its source. The varying propagation delay as the radio waves pass through different parts of the cometary nucleus will be used to determine the dielectric properties of the nuclear material. Summary of CONSERT Characteristics Centre frequency (MHz): 90 Bandwidth (MHz): 10 Mass (kg): 3.1 Dimensions - electronics (l x w x h, mm): 160 x 300 x 46 Dimensions - antenna, deployed (l x w x h, mm): 1528 x 1837 x 1035 Power consumption (average, W): 2.5 Mounting Alignment -------------------------------------------------------- Refer to the latest version of the Rosetta Frames Definition Kernel (FK) [4] for the CONSERT reference frame definitions and mounting alignment information. Apparent FOV Layout -------------------------------------------------------- WARNING -- the description/diagram is this section have not been verified This section provides a diagram illustrating the CONSERT FOV layout in the CONSERT reference frame. ^ | direction of | flight | ^ +Xconsert (down-track) | | --- .__|__. ^ .' | `. | / | \ | . | . | 80 deg | x-------------> +Yconsert (cross-track) | . +Zconsert . | \ / v `. .' --- ` --- ' | 80 deg | Boresight (+Z axis) |<----------->| is into the page | | FOV Parameters -------------------------------------------------------- The following CONSERT FOV parameters are included in the data section below, from [3]: ----------------------------------------------------------------- parameter value ----------------------------------------------------------------- Field of view (deg) Cross-track 80.0 Along-track 80.0 ----------------------------------------------------------------- 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-226160_FOV_ANGULAR_SIZE = ( 1.39626340, 1.39626340 ) INS-226160_IFOV = ( 1.39626340, 1.39626340 ) INS-226160_PIXEL_SAMPLES = ( 1 ) INS-226160_PIXEL_LINES = ( 1 ) INS-226160_CCD_CENTER = ( 0.5, 0.5 ) \begintext FOV Definitions --------------------------------------------------------------------------- This section contains definition for the CONSERT 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 CONSERT FOV with respect to the CONSERT instrument frame as a circle of the size provided in the section above and the boresight along the +Z axis. \begindata INS-226160_FOV_FRAME = 'ROS_CONSERT' INS-226160_FOV_SHAPE = 'CIRCLE' INS-226160_BORESIGHT = ( 0.000000 0.000000 1.000000 ) INS-226160_FOV_CLASS_SPEC = 'ANGLES' INS-226160_FOV_REF_VECTOR = ( 1.000000 0.000000 0.000000 ) INS-226160_FOV_REF_ANGLE = ( 40.000 ) INS-226160_FOV_ANGLE_UNITS = 'DEGREES' \begintext Platform ID --------------------------------------------------------------------------- This number is the NAIF instrument ID of the platform on which the instrument is mounted. For CONSERT this platform is the spacecraft. \begindata INS-226160_PLATFORM_ID = ( -226000 ) \begintext