KPL/FK Cassini Spacecraft Frame Kernel for small satellites =============================================================== This frame kernel contains the constants defining the frames for small satellites (rocks) of Saturn. 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 ISS I-kernel might have an entry as follows: TEXT_KERNEL_ID += 'IAU_ISS V0.0 29-SEPTEMBER-1999 IK' | | | | | | | | KERNEL NAME <-------+ | | | | | V VERSION <-------+ | KERNEL TYPE | V ENTRY DATE Cassini Small Satellites Frame Kernel Version: \begindata TEXT_KERNEL_ID += 'ROCKS V5.0 22-DECEMBER-2004 FK' \begintext Version 1.0 -- May 21, 2003 -- Lee Elson -- Initial Release. Version 2.0 - November 5, 2003 - Diane Conner -- Included IAU approved names. Version 3.0 - April 27, 2004 - Diane Conner -- Changed keyword "FRAME_IAU_ ERRIAPO" to "FRAME_IAU_ERRIAPO" Version 4.0 - November 30, 2004 - Diane Conner -- Added new body names S1_2004, S2_2004 & S5_2004. Version 5.0 - December 22, 2004 - Diane Conner -- Corrected typos in definitions for S1, S2, & S5 2004. References ---------------------------------------------------------- 1. ``Kernel Pool Required Reading'' 2. ``Frames Required Reading'' 3. Email from Diane Conner regarding targeting small satellites, or rocks, of Saturn. 4. Sky & Telescope Magazine,(25th General Assembly of the International Astronomical Union, held from July 13-26 in Sydney, Australia) http://skyandtelescope.com/news/article_1012_1.asp Contact Information ---------------------------------------------------------- Direct questions, comments, or concerns about the contents of this kernel to: Lee Elson, NAIF/JPL, (818)354-4223, Lee.Elson@jpl.nasa.gov Diane Conner, Cassini Science Data Engineering Lead (818)354-8586, Diane.L.Conner@jpl.nasa.gov Introduction ---------------------------------------------------------- This file defines body fixed frames for the small satellites of Saturn. Body fixed frames are reference frames that do not move with respect to ``surface'' features of an object. Note that body fixed frames do move with respect to inertial frames. Information about how these frames are changing with respect to inertial frames is stored in the corresponding SPICE PCK file. Implementation Notes ---------------------------------------------------------- This file is used by the SPICE system as follows: programs that make use of this frame kernel must `load' the kernel, normally during program initialization. Loading the kernel associates data items with their names in a data structure called the `kernel pool'. The SPICELIB routine LDPOOL loads a kernel file into the pool as shown below: CALL LDPOOL ( frame_kernel_name ) In order for a program or subroutine to extract data from the pool, the SPICELIB routines GDPOOL and GIPOOL are used. See [2] for more details. This file was created and may be updated with a text editor or word processor. Assumptions ---------------------------------------------------------- This file assigns frame names to the satellites that are defined by the corresponding PCK file. Any changes to this file must be consistent with the PCK file. Use ---------------------------------------------------------- Several user-level SPICE routines require that the user supply the name of a reference frame as one of the inputs to the routine. The most important of these are the routines SPKEZ and SPKEZR. These routines return the state (position and velocity) of one object relative to another in a user specified reference frame. The choice of reference frame often makes a big difference in the usefulness of a returned state. If the state is relative to a suitable reference frame, computations involving that state can be much simpler than if the state were returned relative to some other reference frame. The SPICE frame subsystem allows you to easily transform states from one reference frame to another. Usually this can be done without needing to know all of the details of how the transformation is carried out. This allows you to concentrate on questions more closely related to the problem you are trying to solve instead of the details of how to get information in the frame of interest. NAIF requests that you update the `by line' and date if you modify this file. YMIR ---------------------------------------------------------- \begindata FRAME_IAU_YMIR = 619 FRAME_619_NAME = 'IAU_YMIR' FRAME_619_CLASS = 2 FRAME_619_CLASS_ID = 619 FRAME_619_CENTER = 619 OBJECT_619_FRAME = 'IAU_YMIR' \begintext PAALIAQ ---------------------------------------------------------- \begindata FRAME_IAU_PAALIAQ = 620 FRAME_620_NAME = 'IAU_PAALIAQ' FRAME_620_CLASS = 2 FRAME_620_CLASS_ID = 620 FRAME_620_CENTER = 620 OBJECT_620_FRAME = 'IAU_PAALIAQ' \begintext TARVOS ---------------------------------------------------------- \begindata FRAME_IAU_TARVOS = 621 FRAME_621_NAME = 'IAU_TARVOS' FRAME_621_CLASS = 2 FRAME_621_CLASS_ID = 621 FRAME_621_CENTER = 621 OBJECT_621_FRAME = 'IAU_TARVOS' \begintext IJIRAQ ---------------------------------------------------------- \begindata FRAME_IAU_IJIRAQ = 622 FRAME_622_NAME = 'IAU_IJIRAQ' FRAME_622_CLASS = 2 FRAME_622_CLASS_ID = 622 FRAME_622_CENTER = 622 OBJECT_622_FRAME = 'IAU_IJIRAQ' \begintext SUTTUNG ---------------------------------------------------------- \begindata FRAME_IAU_SUTTUNG = 623 FRAME_623_NAME = 'IAU_SUTTUNG' FRAME_623_CLASS = 2 FRAME_623_CLASS_ID = 623 FRAME_623_CENTER = 623 OBJECT_623_FRAME = 'IAU_SUTTUNG' \begintext KIVIUQ ---------------------------------------------------------- \begindata FRAME_IAU_KIVIUQ = 624 FRAME_624_NAME = 'IAU_KIVIUQ' FRAME_624_CLASS = 2 FRAME_624_CLASS_ID = 624 FRAME_624_CENTER = 624 OBJECT_624_FRAME = 'IAU_KIVIUQ' \begintext MUNDILFARI ---------------------------------------------------------- \begindata FRAME_IAU_MUNDILFARI = 625 FRAME_625_NAME = 'IAU_MUNDILFARI' FRAME_625_CLASS = 2 FRAME_625_CLASS_ID = 625 FRAME_625_CENTER = 625 OBJECT_625_FRAME = 'IAU_MUNDILFARI' \begintext ALBIORIX ---------------------------------------------------------- \begindata FRAME_IAU_ALBIORIX = 626 FRAME_626_NAME = 'IAU_ALBIORIX' FRAME_626_CLASS = 2 FRAME_626_CLASS_ID = 626 FRAME_626_CENTER = 626 OBJECT_626_FRAME = 'IAU_ALBIORIX' \begintext SKADI ---------------------------------------------------------- \begindata FRAME_IAU_SKADI = 627 FRAME_627_NAME = 'IAU_SKADI' FRAME_627_CLASS = 2 FRAME_627_CLASS_ID = 627 FRAME_627_CENTER = 627 OBJECT_627_FRAME = 'IAU_SKADI' \begintext ERRIAPO ---------------------------------------------------------- \begindata FRAME_IAU_ERRIAPO = 628 FRAME_628_NAME = 'IAU_ERRIAPO' FRAME_628_CLASS = 2 FRAME_628_CLASS_ID = 628 FRAME_628_CENTER = 628 OBJECT_628_FRAME = 'IAU_ERRIAPO' \begintext SIARNAQ ---------------------------------------------------------- \begindata FRAME_IAU_SIARNAQ = 629 FRAME_629_NAME = 'IAU_SIARNAQ' FRAME_629_CLASS = 2 FRAME_629_CLASS_ID = 629 FRAME_629_CENTER = 629 OBJECT_629_FRAME = 'IAU_SIARNAQ' \begintext THRYM ---------------------------------------------------------- \begindata FRAME_IAU_THRYM = 630 FRAME_630_NAME = 'IAU_THRYM' FRAME_630_CLASS = 2 FRAME_630_CLASS_ID = 630 FRAME_630_CENTER = 630 OBJECT_630_FRAME = 'IAU_THRYM' \begintext S1_2004 ---------------------------------------------------------- \begindata FRAME_IAU_S1_2004 = 632 FRAME_632_NAME ='IAU_S1_2004' FRAME_632_CLASS = 2 FRAME_632_CLASS_ID = 632 FRAME_632_CENTER = 632 OBJECT_632_FRAME = 'IAU_S1_2004' \begintext S2_2004 ---------------------------------------------------------- \begindata FRAME_IAU_S2_2004 = 633 FRAME_633_NAME = 'IAU_S2_2004' FRAME_633_CLASS = 2 FRAME_633_CLASS_ID = 633 FRAME_633_CENTER = 633 OBJECT_633_FRAME = 'IAU_S2_2004' \begintext S5_2004 ---------------------------------------------------------- \begindata FRAME_IAU_S5_2004 = 635 FRAME_635_NAME = 'IAU_S5_2004' FRAME_635_CLASS = 2 FRAME_635_CLASS_ID = 635 FRAME_635_CENTER = 635 OBJECT_635_FRAME = 'IAU_S5_2004' \begintext