File: P11CRT_DIR.txt                           Version: NSSDC 11/15/2001 JFC
----------------------------------------------------------------------------

PIONEER 11 COSMIC RAY TELESCOPE: SIX HOUR INTERPLANETARY COUNTING RATES
AND FLUXES

Principal Investigator: Prof. Frank B. McDonald
                        Institute for Physical Science and Technology
                        University of Maryland, College Park, MD

Data Contact:  Dr. Nand Lal
               Code 935
               NASA Goddard Space Flight Center
               Greenbelt, MD 20771              
               DECnet: LHEAVX::LAL
               Internet: nand@voyager.gsfc.nasa.gov              
               Phone: 301-286-7350

Description: The SIX_HOUR subdirectory includes the full six-hour average
interplanetary cruise count rate and flux data set in ASCII format from the
Pioneer 11 Cosmic Ray Telescope (CRT) experiment. The data set documentation 
in the *.sfdu files is provided in SFDU (Standard Formatted Data Unit) format.
Also see file P11CRT_NMC.txt in the current directory for the experiment
description from the NSSDC Master Catalog.
                                                 
Data Source: NSSDC off-line archive, data set 73-019A-12D

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.