File: P11TRJ_MISSION_FMT.txt                Version: NSSDC 11/15/2001 JFC
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Pioneer 11 Trajectory Ephemeris Archive from Pioneer Project: heliocentric
and planetocentric coordinates for cruise and Jupiter/Saturn planetary 
encounters

   Data Set Coverage (yyyy-mm-dd): 1973-04-06 to 2000-01-01

   Data Set Contact: David W. Lozier, NASA Ames Research Center

   NSSDC Data Set ID: 73-019A-00G

   Description: this is the full archival data set submitted to NSSDC by the
                Pioneer Project at NASA Ames Research Center and includes
                comprehensive ASCII documentation in SFDU format. See files
                VOLDESC.sfdu for the spacecraft and data set descriptions and 
                file FORMAT.sfdu for the detailed format description. Time
                intervals between data points are daily through 1990-01-01 
                and monthly thereafter.

   Data Set Files: TRJP11mmn.asc - data in six month blocks (mm= year, n= A 
                                   or B for Jan-Jun or Jul-Dec,resp.)
                   VOLDESC1.sfdu  - SFDU volume description file for 1973-1989
                   VOLDESC2.sfdu  - SFDU volume description file for 1990-2000
                   FORMAT.sfdu    - SFDU format description file 

   Parameter Format: fully described in the SFDU document files. Codes 
                     READ_ECL.for, READ_JUP.for, and READ_SAT.for can be
                     used to extract coordinates for solar ecliptic,
                     Jupiter System III, and Saturn (Pioneer 11 only). 
              
   

Related Information and Data:

Further details on the spacecraft, experiment, data sets at NSSDC, and related
WWW sites can be found on the Pioneer 10/11 flight project page under

http://nssdc.gsfc.nasa.gov/space/

Hour averages of the interplanetary solar wind data from, and hourly
heliocentric coordinates of, Pioneer 10/11 and other interplanetary 
spacecraft may be also be accessed and plotted on-line through the COHOWeb 
service based at the same WWW site as above. Access to the Satellite Situation 
Center (SSC) service for heliocentric coordinates from Pioneer, Voyager, 
Ulysses, and other heliocentric spacecraft is also provided from this site. 

Acknowledgement:

Use of these data in publications should be accompanied at minimum by
acknowledgements of the National Space Science Data Center and the responsible
Principal Investigator defined in the experiment documentation provided here.