GOES R ERA HIGH RESOLUTION DATA DISTRIBUTION – How and How Much

1. GOES R ERA HIGH RESOLUTION DATA DISTRIBUTION –How and How Much NOAA Satellite Conference for the AmericasMiami, FLDecember 9-13, 2002 Roger Heymann Senior Engineer Advanced Systems & Requirements Planning Office of Systems Development NOAA-NESDIS Roger.Heymann@noaa.gov

2. This presentation is mostly a request to Nations of the Americas for information on their GOES satellite use, as NOAA examines high resolution data distribution for the GOES R era. We are exploring how to distribute and how much. • We are asking you to look to the future, to GOES R’s launch in year 2012 and 15 years there after. The final GOES R Imager and Sounder capabilities aren’t set. They will be governed by NOAA’s ongoing requirements studies. Globally Distributed Processed Data to GOES users GOES R vs GOES I-M, N-P data Rates Raw GOES Sensor DataTo Wallops, VA *Reflects sounder data compression. * NOAA has considered distributing as little as 10 Mbps reflecting 10-15 band imager and 1 to 2 Mbps of sounder data; and as much as 24 Mbps. How much to distribute is under active study. There could be as much as 82 Mbps of processed GOES R data available for users. ** Distribution of only 4.2 Mbps would have the least cost impact guided by modifying the current modulation from BPSK to QPSK

3. NOAA studies show Costs for a global distribution of all of the high resolution GOES R data could be high, no matter the approach. This is a concern. • Technology exists to enable GOES R to continue global distribution of this high resolution data larger data, as shown by our studies. • (slide on contours). GOES distribution reaches U.S., Nations of the Americas, Western Europe, African West coast, and across the Pacific to Guam • (slide on options)Studies show options for the GOES R era distribution of real time and continuous data such as Commercial Communication Satellites and Dedicated Landlines. Costs of Dedicated Landline are a concern. Early studies showed Commercial and GOES R costs were comparable, but now looking at ways to reduce GOES R costs. • We are working to gain new X band radio frequency spectrum allocation for the raw sensor data downlink, and processed data uplink to the satellite from Wallops. We will more efficiently use a larger L band spectrum for data distribution to users.   • The GVAR sites will have a cost impact from technology, storage, and software changes. We are studying all of this. • We want to find the right balance between getting out needed GOES R information to support improved weather forecasts to nations of the Americas and controlling costs. • Clearly we plan in the GOES R era, to distribute data needed to support nations’ weather and aviation services forecasts.

4. The issue for NOAA is: How much new data do we send out and how? • We are finding ways to lower satellite data distribution costs. Data rate compression for sounder data is under study. We want to maximize use of the L band RF spectrum for the re-broadcast. Advanced 16QAM modulation with 15/16 Code rate enable high rate broadcast but necessitate high GOES R power. To avoid high power and its costs lower QPSK modulation and ½ code rate with expanded spectrum is under study. • Data needs vary: • Government weather forecast modeling centers need the greatest data. • General and Aviation weather forecast offices need less data, as do U.S. WFOs. • General GVAR users, Universities, Private sector data requirements are not well known. • NOAA needs information on your nation’s weather forecast operations and your data needs as we work on the distribution issue.

5. Through this conference’s GOES R talks and the panel immediately following, we are trying to get information on your nation’s future data needs. • It would be helpful to know for the GOES R era, for example: • GOES importance to your nation’s forecasts • Weather forecast modeling capability • Location of your government sites needing data • Nations’ use of GOES data (i.e. precipitation, hurricane, aviation, etc) • Sounder data needs • Timeliness needs – Real time or delayed • The NESDIS web page was modified to help share information afterwards. http://www.osd.noaa.gov/announcement/DecConference.htm We look forward to a dialogue with you. We have set up an e mail address of: NESDIS.OSD.NOAASatellites@noaa.gov to facilitate your contacting us after the conference. End

6. GOES Communication Broadcast & Imager/Sounder-measurement Coverages GOES 75W & GOES 135W Nov 7, 2002 Imager coverage Montana N. Dakota Imager coverage Sounder coverage Sounder coverage Hawaii Wake island  Northern Marianas Islands Guam Marshall Islands Palau  Federated States of Micronesia American Samoa Tahiti Fiji Communication Coverage 0 deg 0 deg 5 deg 5 deg 0 & 5 deg Communication Coverage Contours Effective measurement area for imager & sounder numerical & visual observations. Imager coverage corresponds to anEl=6 degs to GOES. Imager & Sounder coverage is nominal maximum area of effective measurement through the atmosphere with GOES at 75 and 135 degrees W, as judged by NESDIS (ORA, OSDPD) and CIMSS Univ of Wisconsin scientists. Communication coverage (GRB, EMWIN, LRIT) is out to 0 & 5 deg elevation angles to GOES (Communication contours developed by the Aerospace corp)