NOAA Satellite Information System

NOAA Technical Report NESDIS 82

NOAA Technical Report NESDIS 82:
An Introduction to the GOES I-M Imager and Sounder Instruments and the GVAR Retransmission Format
(November 1994)



		     NOAA TECHNICAL REPORT NESDIS 82



         OFFICE OF SYSTEMS DEVELOPMENT GROUND SYSTEMS DIVISION

                            WASHINGTON, D.C.
                              October 1994


           AN INTRODUCTION TO THE GOES I-M IMAGER AND SOUNDER
             INSTRUMENTS AND THE GVAR RETRANSMISSION FORMAT

                              PREPARED BY
                           RAYMOND J. KOMAJDA
                         THE MITRE CORPORATION

                               EDITED BY
                             KEITH MCKENZIE
                     OFFICE OF SYSTEMS DEVELOPMENT


                      U.S. DEPARTMENT OF COMMERCE
            NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION
    NATIONAL ENVIRONMENTAL SATELLITE, DATA, AND INFORMATION SERVICE


                                PREFACE

     This document is an update of NOAA Technical Report NESDIS 33,
published in October, 1987.  It is addressed to experienced direct readout
users of the GOES Mode AAA processed instrument data.  Readers wanting
a greater familiarity with Mode AAA are referred to the following
documents:

         GOES GH Data Book, Hughes Aircraft Company, March 1986

         Operational VAS Mode AAA Format, Specification, NOAA/NESDIS
         Office of Systems Development, February 1987, SFP002

     The purpose of this document is to acquaint these users with the
characteristics of the processed instrument data that are available from the
new series of GOES satellites, GOES I-M.  This document includes a
comparison of the GOES D-H VAS instrument with the instruments on the
GOES I-M series of satellites and a definition of the processed instrument
data format for GOES I-M.  It is the intent of this document to provide direct
readout (Mode AAA) users with sufficient background information for them
to phaseover to GOES I-M.

     The topic of this report is the GVAR processed data as it will be
retransmitted to direct readout users.  Information on the spacecraft, the
imaging and sounding instruments, and the ground system is presented only
to provide sufficient background and context for an understanding of the
GVAR format.  GVAR contains Imager and Sounder data.  The other
on-board instruments and their data and the special purpose transponders are
not addressed in this report.

     GOES I was launched April 13, 1994; redesignated GOES-8 upon
attaining geostationary orbit, it is undergoing checkout through October,
1994.  The remaining spacecraft in the GOES I-M series are in various stages
of assembly.  GOES-J is scheduled for launch in 1995; its instruments are in
test at this time.

     The defining document for the GVAR format is Section 3 of Space
Systems/Loral Operations Ground Equipment (OGE) Interface Specification
DRL 504-02-1, Contract NAS5-29500.  The most recent version available at
the time of publication is Revision C dated 01/28/94.  Much of the material
contained herein is compiled directly from documents delivered to the
Government under contract by Ford Aerospace and Communications
Corporation, Space Systems/Loral, and their subcontractors.

The full version of the NESDIS 82 document may be viewed as an Adobe Acrobat PDF document.

 

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