NOAAPort Expansion Philip Cragg NWS/Systems Engineering Center

2 Requirement Deliver the ever increasing data volume to the field. Data delivery requirements to the field are expected to increase by 10 fold by A scalable delivery method is needed to keep up with the demand. An open standard solution will allow procurement of COTS equipment.

3 The Plan Use Digital Video Broadcast – Satellite (DVB-S) technology to deliver high volumes of data to the field. Use data compression to free up a NOAAPort T-1 channel (complete ). Use freed up T-1 to introduce DVB-S technology system wide, creating the NWSTG2 channel (complete ). Add CONUS/DGEX grids (complete ) and Eta12-Grid218 (tentative completion ) to the NWSTG2 channel in GRIB2/JPEG2000 format. Convert the existing 3 1/2 T1 channels into a single, linearly scalable channel (tentative completion Feb, 2005).

4 Benefits of DVB-S Current NOAAPort technology requires deployment of a new proprietary demodulator to the field for every T1 (1.5 Mbits/sec) increase in data capacity. New DVB-S technology is linearly scalable to meet data requirement demands using a single demodulator up to 43 Mbits/s per demodulator (vs. 28 T-1 demodulators). DVB-S technology is a one channel solution. –The inherently bursty data of NOAAPort is transmitted much more efficiently over a single channel, as opposed to discrete T1 channels. DVB-S technology is open source, and open standard. – Interoperability and competition among vendors. –A DVB-S demodulator is a fraction of the cost of the existing proprietary NOAAPort demodulators.

5 NOAAPort’s Future After the DVB-S technology is proven, NOAAPort will become a single channel carrying all NOAAPort data using DVB-S. Data requirements will be evaluated yearly and the NOAAPort channel will be scaled accordingly.

6 GOES WEST Mbits/sec GOES EAST Mbits/sec OCONUS 772Kbps TG Mbits/sec Past NOAAPort Configuration Through Compressed GOES WEST Mbits/sec Compressed GOES EAST Mbits/sec OCONUS 772Kbps TG Mbits/sec NOAAPort configuration from through Combined GOES Mbits/sec Combined GOES Mbits/sec OCONUS 772Kbps TG Mbits/sec NOAAPort configuration from through Combined GOES Mbits/sec OCONUS 772Kbps TG Mbits/sec NOAAPort configuration From through Past NOAAPort Configuration. NOAAPort configuration after compressing GOES feeds. NOAAPort configuration after combining GOES feeds. NOAAPort configuration transmitting test DVB-S signals On the former GOES West channel. DVB-S Test Signals Mbits/sec Migration to high capacity, single DVB-S NOAAPort channel

7 TG/OCONUS/GOES Using DVB-S Up to 43 Mbits/sec Future NOAAPort configuration Single DVB-S NOAAPort channel carrying all NOAAPort traffic scaled to meet data requirements. Migration to high capacity, single DVB-S NOAAPort channel Combined GOES East/West Mbits/sec OCONUS 772Kbps TG Mbits/sec Current NOAAPort configuration as of TG Mbits/sec NOAAPort configuration with second TG channel. TG/OCONUS/GOES Using DVB-S Mbits/sec (or 6 T1 equivalent) Tentative NOAAPort configuration, Feb 2005 Single DVB-S NOAAPort channel carrying all NOAAPort traffic, expanded to 6 T1 capacity.

8 NEW NOAAPort Channel Characteristics Satellite: AMC-4 Transponder: 13C Downlink center frequency: 3,956.5 MHz Symbol Rate: Msymbols/sec Data Rate: Mbits/sec Occupied bandwidth: 8.6 MHz Modulation: QPSK – 7/8 rate

9 Spans T1 and DVB-S NOAAPort technologies. Compression at source (NCEP). Transition period to include dual support (for both GRIB1 and GRIB2(JPEG2000)). Cost of additional compress/decompress processing time outweighed by freed NOAAPort bandwidth. Freed bandwidth allows addition of newer and higher resolution model grids (e.g., 12km Eta and full GFS support) and other products. Transition to Grid Compression on NOAAPORT