File: P11PLA_DIR.txt                       Version: NSSDC 11/15/2001 JFC
-------------------------------------------------------------------------

Directory Descriptions

VERSION23

Version 2.3 of the Pioneer 10 Plasma Analyzer Data Archive at NSSDC is a
reprocessed version of older data in the NSSDC archive. In subdirectory
VERSION23 the document files (*.sfdu) are given in Standard Formatted 
Data Unit (SFDU) format and include the data set overview 
(VOLDESC_PIOPLA.sfdu), the formats of the four separate data types 
(FORMATSM.sfdu - high resolution summary, FORMATHR.sfdu -  hourly 
averages, FORMATAT.sfdu - spacecraft attitude, data files (*.DAT) for 
each datatype, and FORTRAN files (PIOPLASM.sfdu, PIOPLAHR.sfdu, 
PIOPLAAT.sfdu, and PIOPLATR.sfdu) to read each binary file and output 
selected parameters in ASCII format. The VMS binary data files are 
accessible from NSSDC's VMS FTP site at anonymous@nssdca.gsfc.nasa.gov in
directory [COHO.PIONEER_10.PLASMA.VERSION23] for coverage through 1992. 
FORTRAN source codes to produce ASCII listings of selected parameters 
are provided here. Selected information on the Pioneer 11 Plasma Analyzer
experiment from the NSSDC Master Catalog is given in file P11PLA_NMC.txt 
in the current directory.

HOUR

Hourly average Pioneer 11 plasma data in ASCII format has been retrieved 
from the Pioneer Plasma Group Web site at NASA Ames into subdirectory 
HOUR. This is the same Version 2.3 data as documented in binary form in 
subdirectory VERSION23.

SPECTRA

Documentation, software, and sample files for the off-line (CD) data set
(NSSDC ID 73-019A-13L) of high resolution spectral samples for 
interplanetary solar wind measurements. The NSSDC Master Catalog entry 
for this data set is in file P11PLA_SPECTRA_NMC.txt. 


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.

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.