Format for Spacecraft 3-D Normal Point Observations

These observations have been reduced to Earth=planet vectors at a given ephemeris coordiante time,
so no light time or aberation corrections should be applied.

   Column   Content
     1      Planet name
     2      Spacecraft 4-character identifier
     3-6    Ephemeris coordinate year/month/day/time at which Earth and Planet vectors are evaluated
              where time is JPL Ephemeris Time (ET), nominally TDB
     7      Observed right ascension, in arcseconds
     8      Difference between observed right ascension and value on DE 405, in arcseconds
     9      Uncertainty in right ascension, in arcseconds
    10      Observed declination, in arcseconds
    11      Difference between observed declination and value on DE 405, in arcseconds
    12      Uncertainty in declination, in arcseconds
    13      Observed two-way range (one-way range times 2), in microseconds
    14      Difference between observed two-way range and value on DE 405, in microseconds
    15      Uncertainty in two-way range, in microseconds