File: aareadme.txt                          Version: NSSDC 03/10/2010 JHK
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Pioneer 11 Geiger Tube Telescope (GTT) Data

Experiment: Pioneer 11 Geiger Tube Telescope (GTT) Experiment

Principal Investigator: Prof. James A. Van Allen
                        Dept. of Physics and Astronomy
                        University of Iowa
                        Iowa City, IA


Description: This directory includes data from the Pioneer 11 Geiger Tube
Telescope (GTT) experiment. There are three information files and four data 
directories at this time:

  aareadme.txt:     This file
  aavoldesc.sfd:    U.Iowa-generated, SFDU-formatted documentation file with
		    some specificity to 15 min binary data but with much 
		    information relevant to all GTT data. 
  aoverview.txt     Discussion of relations among the multiple GTT data sets 
                    of this directory.
  ip_15min_ascii:   Contains 15-min cruise-phase and 3 Dec 1974 and 1 Sep 1979 
                    planetary encounter count rates and related 
                    parameters as provided to NSSDC in binary and converted 
                    by SPDF to ASCII.
  ip_1hour_ascii:   Contains hourly-averaged count rates derived by NSSDC from 
                    a subset of the rates of the full GTT 15-minute averaged
                    cruise-phase and 3 Dec 1974 and 1 Sep 1979 planetary encounter data, in ASCII
  ip_1day_ascii:    Contains 1-day-averaged cruise-phase and 3 Dec 1974 and
                    1 Sep 1979 planetary encounter count rates and related 
                    parameters as provided to NSSDC in binary and converted 
                    by SPDF to ASCII.  



Related Information and Data:

In addition to the documentation files identified above, details on 
the spacecraft, experiment, data sets at NSSDC, and related
WWW sites can be found on NSSDC's Pioneer 11 flight project page under

  http://nssdc.gsfc.nasa.gov/nmc/spacecraftDisplay.do?id=1973-019A

Likewise, NSSDC's description of the GTT experiment can be found at:

  http://nssdc.gsfc.nasa.gov/nmc/experimentDisplay.do?id=1973-019A-11

Hourly averages of the interplanetary solar wind data from Pioneer 11 as well
as hourly heliocentric coordinates of it and other interplanetary spacecraft
may be also be accessed and plotted on-line through the COHOWeb service at:

  http://cohoweb.gsfc.nasa.gov/



Acknowledgement:

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