Dawn Structures SPK File =============================================================================== This SPK file contains location of various Dawn structures and science and engineering instruments. Version and Date -------------------------------------------------------- Version 1.0 -- Tue May 8 14:14:09 PDT 2007 -- Boris Semenov/NAIF Initial Release. Contact Information ---------------------------------------------------------------------- Boris Semenov, NAIF/JPL, Boris.Semenov@jpl.nasa.gov References ---------------------------------------------------------------------- 1. ``Frames Required Reading'' 2. ``SP-Kernel Required Reading'' 3. ``C-Kernel Required Reading'' 4. Dawn Frame Kernel, Latest Version 5. Dawn engineering drawings (S912000100A0 & S91241220100) Related SPICE Kernels ---------------------------------------------------------------------- Descriptions/definitions from the Dawn Frames Kernel (FK) file are required in order to understand objects and frames with respect to which the locations are defined in this SPK file. Coordinates ---------------------------------------------------------------------- This table lists ID codes, centers ID codes, and reference frame names for Dawn structures, the locations of which are provided in this SPK file: STRUCTURE ID CENTER FRAME ------------------------- ------- ------- ------------------------- DAWN_HGA -203040 -203 DAWN_SPACECRAFT DAWN_SA+Y_GIMBAL -203011 -203 DAWN_SPACECRAFT DAWN_SA+Y_C1 -203012 -203011 DAWN_SA+Y DAWN_SA+Y_C2 -203013 -203011 DAWN_SA+Y DAWN_SA+Y_C3 -203014 -203011 DAWN_SA+Y DAWN_SA+Y_C4 -203015 -203011 DAWN_SA+Y DAWN_SA-Y_GIMBAL -203021 -203 DAWN_SPACECRAFT DAWN_SA-Y_C1 -203022 -203021 DAWN_SA-Y DAWN_SA-Y_C2 -203023 -203021 DAWN_SA-Y DAWN_SA-Y_C3 -203024 -203021 DAWN_SA-Y DAWN_SA-Y_C4 -203025 -203021 DAWN_SA-Y The HGA ("H"), SA gimbal ("G" x2), and SA corners ("C1".."C4" x2) are shown on the diagrams below: +X s/c side (HGA side) view: ---------------------------- Science Deck C3 +Xsa-y._____________. C1 C2 o__ _______________o ^| ._____. | o______________ ___o | \ \ C4 \ || .' `. | / \ \ | | / / \ ||/ | \| / / / | | \ \ `.|. | .G.' \ \ | | / / +Ysa-y <-----o| o H |o-----> +Ysa+y / / | | \ \ .'G. .' `. .|`. \ \ | | / / / |\ +Zsc^ ` /|| \ / / | o__\ \______________o/ | `. | .' || \o______________\ \__o C2 -Y Solar Array C1 .___` -|- '___.v C4 +Y Solar Array C3 / | \ +Xsa+y `-o-----> +Xsc +Ysc Active solar cell is facing the viewer +Z s/c side (science deck side) view: ------------------------------------- ._____________. | | | | C3(C2) C4(C1) G| +Zsc +Ysc|G C1(C4) C2(C3) o==/ /==============o====o| o----->|o====o=============/ /==o -Y Solar Array | | | +Y Solar Array | | | .______|______. .--V +Xsc HGA .' `. /___________\ `.|.' Active solar cell is o H facing down the page. Data section of the file. ---------------------------------------------------------------------- The HGA location is for the antenna structure outermost point along the antenna boresight. It was "guestimated" (to +/- 1 centimeter) from [5] and is to be replaced with a more accurate numbers in a future version of this file. The SA gimbal locations are arbitrary chosen points on the gimbal rotation axes (approximately at the intersection of the s/c side panel outer surface and the gimbal axis). The solar array corner points are intersections of the solar array short edges with the plane containing the array gimbal axes. Locations for the gimbals and corners are from [5]. \begindata SITES += ( 'DAWN_HGA' ) DAWN_HGA_IDCODE = -203040 DAWN_HGA_CENTER = -203 DAWN_HGA_FRAME = 'DAWN_SPACECRAFT' DAWN_HGA_XYZ = ( 0.0012497 0.0000000 0.0015545 ) DAWN_HGA_BOUNDS = ( @2007-01-01, @2020-01-01 ) SITES += ( 'DAWN_SA+Y_GIMBAL' ) DAWN_SA+Y_GIMBAL_IDCODE = -203011 DAWN_SA+Y_GIMBAL_CENTER = -203 DAWN_SA+Y_GIMBAL_FRAME = 'DAWN_SPACECRAFT' DAWN_SA+Y_GIMBAL_XYZ = ( 0.0000000 0.0006350 0.0010833 ) DAWN_SA+Y_GIMBAL_BOUNDS = ( @2007-01-01, @2020-01-01 ) SITES += ( 'DAWN_SA+Y_C1' ) DAWN_SA+Y_C1_IDCODE = -203012 DAWN_SA+Y_C1_CENTER = -203011 DAWN_SA+Y_C1_FRAME = 'DAWN_SA+Y' DAWN_SA+Y_C1_XYZ = ( -0.0011836 0.0009296 0.0000000 ) DAWN_SA+Y_C1_BOUNDS = ( @2007-01-01, @2020-01-01 ) SITES += ( 'DAWN_SA+Y_C2' ) DAWN_SA+Y_C2_IDCODE = -203013 DAWN_SA+Y_C2_CENTER = -203011 DAWN_SA+Y_C2_FRAME = 'DAWN_SA+Y' DAWN_SA+Y_C2_XYZ = ( -0.0011836 0.0092329 0.0000000 ) DAWN_SA+Y_C2_BOUNDS = ( @2007-01-01, @2020-01-01 ) SITES += ( 'DAWN_SA+Y_C3' ) DAWN_SA+Y_C3_IDCODE = -203014 DAWN_SA+Y_C3_CENTER = -203011 DAWN_SA+Y_C3_FRAME = 'DAWN_SA+Y' DAWN_SA+Y_C3_XYZ = ( 0.0011836 0.0092329 0.0000000 ) DAWN_SA+Y_C3_BOUNDS = ( @2007-01-01, @2020-01-01 ) SITES += ( 'DAWN_SA+Y_C4' ) DAWN_SA+Y_C4_IDCODE = -203015 DAWN_SA+Y_C4_CENTER = -203011 DAWN_SA+Y_C4_FRAME = 'DAWN_SA+Y' DAWN_SA+Y_C4_XYZ = ( 0.0011836 0.0009296 0.0000000 ) DAWN_SA+Y_C4_BOUNDS = ( @2007-01-01, @2020-01-01 ) SITES += ( 'DAWN_SA-Y_GIMBAL' ) DAWN_SA-Y_GIMBAL_IDCODE = -203021 DAWN_SA-Y_GIMBAL_CENTER = -203 DAWN_SA-Y_GIMBAL_FRAME = 'DAWN_SPACECRAFT' DAWN_SA-Y_GIMBAL_XYZ = ( 0.0000000 -0.0006350 0.0010833 ) DAWN_SA-Y_GIMBAL_BOUNDS = ( @2007-01-01, @2020-01-01 ) SITES += ( 'DAWN_SA-Y_C1' ) DAWN_SA-Y_C1_IDCODE = -203022 DAWN_SA-Y_C1_CENTER = -203021 DAWN_SA-Y_C1_FRAME = 'DAWN_SA-Y' DAWN_SA-Y_C1_XYZ = ( -0.0011836 0.0009296 0.0000000 ) DAWN_SA-Y_C1_BOUNDS = ( @2007-01-01, @2020-01-01 ) SITES += ( 'DAWN_SA-Y_C2' ) DAWN_SA-Y_C2_IDCODE = -203023 DAWN_SA-Y_C2_CENTER = -203021 DAWN_SA-Y_C2_FRAME = 'DAWN_SA-Y' DAWN_SA-Y_C2_XYZ = ( -0.0011836 0.0092329 0.0000000 ) DAWN_SA-Y_C2_BOUNDS = ( @2007-01-01, @2020-01-01 ) SITES += ( 'DAWN_SA-Y_C3' ) DAWN_SA-Y_C3_IDCODE = -203024 DAWN_SA-Y_C3_CENTER = -203021 DAWN_SA-Y_C3_FRAME = 'DAWN_SA-Y' DAWN_SA-Y_C3_XYZ = ( 0.0011836 0.0092329 0.0000000 ) DAWN_SA-Y_C3_BOUNDS = ( @2007-01-01, @2020-01-01 ) SITES += ( 'DAWN_SA-Y_C4' ) DAWN_SA-Y_C4_IDCODE = -203025 DAWN_SA-Y_C4_CENTER = -203021 DAWN_SA-Y_C4_FRAME = 'DAWN_SA-Y' DAWN_SA-Y_C4_XYZ = ( 0.0011836 0.0009296 0.0000000 ) DAWN_SA-Y_C4_BOUNDS = ( @2007-01-01, @2020-01-01 ) \begintext