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                         IMCCE - Observatoire de Paris

      Containt of the directory:  /pub/ephem/satel/fp7-espace/Mars/SPICE

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CONTENTS: These files give the ephemerides of the Mars moons.


AUTHOR  : V. Lainey


ADDRESS : IMCCE - Observatoire de Paris
          77 av. Denfert Rochereau, F-75014 PARIS
          Phone: (1) 40 51 22 69   
          Fax:   (1) 46 33 28 34 
          e-mail: lainey@imcce.fr


README FILE:   
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18/08/2015
 
SPK file prepared by: Valery Lainey (lainey@imcce.fr)
 
This file provides IMCCE ephemeris "NOE-4-2015-b" of Phobos and Deimos.
 
Time coverage in Julian days for
 
- Phobos: 2404062.500  -  2496652.400   (1869 DEC 31 00:00 - 2123 JUL 02 21:36)
- Deimos: 2404062.500  -  2498582.900   (1869 DEC 31 00:00 - 2128 OCT 14 09:36)
 
Polynomial degree: 19
 
The accuracy of Chebychev representations is better than 10 m (position) and 5.d-6 km/day (velocity) for all moons.
 
Expected external accuracy of these ephemerides highly depends on the time considered.
A precision of few hundreds of meters is expected over the years (2004-2015) for both moons.
 
Real accuracy on Deimos' orbit might be off of few kilometers on this same period (see Lainey et al. 2016 for discussion).
 
SPK file was generated on Mac OS-X.
 
Questions, comments or special requests should be sent to V.Lainey (lainey@imcce.fr)
 
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These ephemerides and data are issued from the activity of the Institut de Mecanique Celeste et de Calcul des
Ephemerides (IMCCE-Paris Observatory) in Celestial Mechanics and Astrometry.
 
This work was supported by the ESPaCE (European Satellite Partnership for Computing Ephemerides) FP7-Program under ESA grant agreement contract 263466.