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NOAAPort Expansion

NOAAPort Expansion. Philip Cragg NWS/Systems Engineering Center 1-13-05. Requirement. Deliver the ever increasing data volume to the field. Data delivery requirements to the field are expected to increase by 10 fold by 2010. A scalable delivery method is needed to keep up with the demand.

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NOAAPort Expansion

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  1. NOAAPort Expansion Philip Cragg NWS/Systems Engineering Center 1-13-05

  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 2010. • 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 8-20-03). • Use freed up T-1 to introduce DVB-S technology system wide, creating the NWSTG2 channel (complete 5-28-04). • Add CONUS/DGEX grids (complete 6-14-04) and Eta12-Grid218 (tentative completion 6-29-04) to the NWSTG2 channel in GRIB2/JPEG2000 format. • Convert the existing 31/2 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. Migration to high capacity, single DVB-S NOAAPort channel TG 1.544 Mbits/sec GOES WEST 1.544 Mbits/sec OCONUS 772Kbps GOES EAST 1.544 Mbits/sec Past NOAAPort Configuration Through 8-5-03 Past NOAAPort Configuration. TG 1.544 Mbits/sec Compressed GOES WEST 1.544 Mbits/sec OCONUS 772Kbps Compressed GOES EAST 1.544 Mbits/sec NOAAPort configuration from 8-5-03 through 8-12-3 NOAAPort configuration after compressing GOES feeds. TG 1.544 Mbits/sec Combined GOES 1.544 Mbits/sec OCONUS 772Kbps Combined GOES 1.544 Mbits/sec NOAAPort configuration from 8-12-03 through 8-19-03 NOAAPort configuration after combining GOES feeds. TG 1.544 Mbits/sec DVB-S Test Signals 1.544 Mbits/sec OCONUS 772Kbps Combined GOES 1.544 Mbits/sec NOAAPort configuration From 8-20-03 through 6-13-04 NOAAPort configuration transmitting test DVB-S signals On the former GOES West channel.

  7. Migration to high capacity, single DVB-S NOAAPort channel TG1 1.544 Mbits/sec TG2 1.544 Mbits/sec OCONUS 772Kbps Combined GOES East/West 1.544 Mbits/sec Current NOAAPort configuration as of 1-13-05 NOAAPort configuration with second TG channel. TG/OCONUS/GOES Using DVB-S Up to 43 Mbits/sec TG/OCONUS/GOES Using DVB-S 9.264 Mbits/sec (or 6 T1 equivalent) Future NOAAPort configuration Tentative NOAAPort configuration, Feb 2005 Single DVB-S NOAAPort channel carrying all NOAAPort traffic scaled to meet data requirements. 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: 6.349422 Msymbols/sec • Data Rate: 10.24 Mbits/sec • Occupied bandwidth: 8.6 MHz • Modulation: QPSK – 7/8 rate

  9. Transition to Grid Compression on NOAAPORT • 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.

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