CONTENTS ( Con . ) 



2.2.2 Sensor platform transmitter response format 14 



2.2.3 Command/ interrogate signal format 14 



2.2.4 Platform radio set characteristics 17 



2.2.5 Environmental considerations 17 



2.3 Spacecraft function in the DCS 17 



2.3.1 Communication Transponder 17 



2.3.2 Conditions affecting access and performance 18 



2.4 Command and data acquisition 18 



2.4.1 Response data and command/ interrogate signals 18 



2.4.2 Time data and command/interrogate signal format 19 



2.4.3 Response data demodulation and transmission to 19 

 CDF 



2.5 Data Recovery-Central Distribution Facility 20 

 (CDF) 



2.5.1 Recovered data characteristics 20 



2.5.2 Error checks and abnormal responses 20 



2.5.3 User access to recovered data 21 



2.5.3.1 User dissemination circuits 21 



2.5.3.2 Dedicated circuit 21 



2.5.3.3 1200-baud DDD circuit 24 



2.5.3.4 110-baud DDD circuit 27 



REFERENCES 



Appendix A - Users Request Questionnaire 



Appendix B - Memorandum of Agreement Between NOAA 

 and the User 



Appendix C - DCPRS Certification Standards 

 (Interrogated & Self-Timed) 



Appendix D - Some Considerations in the Design and 

 Installation of a Receiving System To 

 Receive DCS Data Directly From the SMS/ 

 GOES Family of Satellites 



Appendix E - Certification Specifications for 

 International DCPRS 



IV 



