Probe Delivery SPICE File Descriptions Location: ftp://csollazz@ftp.esoc.esa.de/from_JPLNAV/revc/ *.bsp files are binary *.xsp files are the same files only in the original transfer format which is platform independent. _________________________________________________________ 020910_OPK_TBM22_TCP1.bsp: probe/orbiter trajectory file. 020910 is always the date of the delivery. OPK means Orbiter Probe Kernel. TBM22 means Tb minus 22 days TCP1 means Tc plus 1 day. _________________________________________________________ PE_DE405.bsp: planet ephemerides _________________________________________________________ SE_SAT105.bsp: Saturn satellites ephemerides _________________________________________________________ 020910_PODF.txt: text kernel that is readable. It contains the probe/orbiter state vectors and the 14x14 covariance matrix at interface epoch. (The sqrt of the eigenvalues of this matrix are the semi-major and semi-minor axis of the dispersion ellipse). Predicted Interface Time (ET), created from Run Time Fingerprint file on Wed Mar 12 13:10:28 2003. Interface_Time = ( @14-JAN-2005-09:00:00.000) Orbiter position (km) and velocity (km/s) vectors in Titan-centered, EME2000 coordinates at the predicted interface time. Probe position (km) and velocity (km/s) vectors in Titan-centered, EME2000 coordinates at the predicted interface time. Saturnian system gravitational constant (GM) in km3/s2: 3.794062976D+07 Titan gravitational constant (GM) in km3/s2: Estimate_Titan_GM = ( 8.978200000D+03 ) Full 14 x 14 knowledge covariance matrix mapped at the predicted interface time. Ordered as probe state (Xp,Yp,Zp,DXp,DYp,DZp), orbiter state (Xo,Yo, Zo,DXo,DYo,DZo), Saturnian system GM, the Titan GM. _________________________________________________________ 020910_PVPF.txt: NASA/ESA interface verification file and contains lots of useful information: Predicted Interface Time (ET) Titan pole right ascension, declination at interface time (degrees) Titan prime meridian angle from Q-axis at interface time (degrees) Saturnian system barycenter state vector relative to solar system barycenter in EME2000 coordinates at the interface time (km, km/s). Titan state vector relative to Saturnian system barycenter in EME2000 coordinates at the interface time (km, km/s). Probe state vector in Titan Q-system coordinates at interface time (km, km/s) Probe state vector in Titan centered EME2000 coordinates at interface time (km, km/s) Probe impact vector parameters in Titan B-plane coordinates at interface time (B-plane radius in km, Bplane angle in degrees, measured clockwise from T axis) Probe position error ellipse in B-plane coordinates (semimajor axis in km, semiminor axis in km, orientation angle in degrees measured clockwise from T axis) Orbiter state vector in Titan Q-system coordinates at interface time (km, km/s) Orbiter state vector in Titan centered EME2000 coordinates at interface time (km, km/s) Orbiter impact vector parameters in Titan B-plane coordinates at interface time (B-plane radius in km, Bplane angle in degrees, measured clockwise from T axis) Orbiter position error ellipse in B-plane coordinates (semimajor axis in km, semiminor axis in km, orientation angle in degrees measured clockwise from T axis) Predicted Periapsis Time (ET) Orbiter state vector in Titan Q-system coordinates at periapsis (km, km/s) Probe spin vector after separation in EME2000 coordinates (deg) _________________________________________________________ 020910_PCK.txt: Planetary Constant file 606 Titan BODY606_POLE_RA = ( 36.41 -0.036 0. ) BODY606_POLE_DEC = ( +83.94 -0.004 0. ) BODY606_PM = ( 189.64 +22.5769768 0. ) BODY606_LONG_AXIS = ( 0. ) BODY606_NUT_PREC_RA = ( 0. 0. 0. 0. 0. 0. +2.66 0. 0. ) BODY606_NUT_PREC_DEC = ( 0. 0. 0. 0. 0. 0. -0.30 0. 0. ) BODY606_NUT_PREC_PM = ( 0. 0. 0. 0. 0. 0. -2.64 0. 0. ) Triaxial Ellipsoid Radii of bodies (km) (equatorial radius to prime meridian equatorial radius perpendicular to prime meridian polar radius) BODY606_RADII = ( 2575. BODY606_GM = ( 2575. 8978.2 2575. ) )