JPL Mars Yard Frame Definitions Kernel -------------------------------------------------------------------- This file contains definition for a single frame: JPL Mars Yard Topocentric frame. This kernel must be loaded into a user's program using SPICELIB's LDPOOL routine in order to enable use of this frame. This frame defines the z axis as the normal outward the surface, the x axis points at local north with the y axis completing to the right handed frame (points west). Positive azimuth is measured counter clockwise from the x axis. Orientation of the frame is given relative to the Earth fixed rotating frame 'IAU_EARTH' (x - along the line of zero longitude intersecting the equator, z - along the spin axis, y - completing to the right hand coordinate frame) The transformation from the 'JPL_MARS_YARD' frame to the 'IAU_EARTH' frame is a 3-2-3 rotation with defined angles as the negative of the site geodetic longitude, the negative of the site geodetic colatitude and 180 degrees. The Mars Yard coordinates used in this file were obtained by Frank Jordan, Jim Campbell and Boris Semenov using the GPS receiver in the Mars yard on February 18, 1998: longitude: 118 deg 10.318 arc.min west ( 118.17197 deg ) latitude: 34 deg 12.115 arc.min north ( 34.20192 deg ) Longitude and latitude measurements are supposed to be very accurate. Version 1.0 -- Boris Semenov, x4-8136 -- February 19, 1998 Version 1.1 -- Boris Semenov, x4-8136 -- June 8, 2012 Added name-ID keywords for 399100/JPL_MARS_YARD. \begindata NAIF_BODY_NAME += ( 'JPL_MARS_YARD' ) NAIF_BODY_CODE += ( 399100 ) FRAME_JPL_MARS_YARD = 1399100 FRAME_1399100_NAME = 'JPL_MARS_YARD' FRAME_1399100_CLASS = 4 FRAME_1399100_CLASS_ID = 1399100 FRAME_1399100_CENTER = 399100 TKFRAME_1399100_RELATIVE = 'IAU_EARTH' TKFRAME_1399100_SPEC = 'ANGLES' TKFRAME_1399100_UNITS = 'DEGREES' TKFRAME_1399100_AXES = ( 3, 2, 3 ) TKFRAME_1399100_ANGLES = ( 118.17197, -55.79808, 180.000 ) \begintext End of FK.