List of abbreviations used in this publication: 



APT(s) Automatic Picture Transmission (System) 



ATS Application Technology Satellite 



AVCS Advanced Vidicon ^amera System 



CDA Command and Data Acquisition 



ISSA Environmental Science Services Administration 



or Environmental S_urvey SAtellite 



GSFC Goddard Space Flight Center 



HDA High Daily Average 



HRIR High Resolution Infrared Radiometer 



IDCS Snage Dissector Camera System 



IRLS Interrogation, Recording and Location System 



ITOS Improved TIROS Operational System 



MRIR Medium Resolution Infrared Radiometer 



MSSCC Multicolor Spin S_can Cloud Camera 



NASA National Aeronautics and Space Administration 



NESC National Environmental S^atellite Center 



WSSDC National S_pace S^cience Data Center 



NWRC National Weather Records Center 



SSCC Spin S_can Cloud Camera 



TIROS Television InfraRed Observational Satellite 



TOS TIROS Operational System 



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