NOAAPort Expansion

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
NOAAPorts 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
GOES WEST 1.544 Mbits/sec
GOES EAST 1.544 Mbits/sec
OCONUS 772Kbps
TG 1.544 Mbits/sec
Past NOAAPort Configuration Through 8-5-03
Past NOAAPort Configuration.
Compressed GOES WEST 1.544 Mbits/sec
Compressed GOES EAST 1.544 Mbits/sec
OCONUS 772Kbps
TG 1.544 Mbits/sec
NOAAPort configuration from 8-5-03 through 8-12-3
NOAAPort configuration after compressing GOES
feeds.
Combined GOES 1.544 Mbits/sec
Combined GOES 1.544 Mbits/sec
OCONUS 772Kbps
TG 1.544 Mbits/sec
NOAAPort configuration from 8-12-03 through
8-19-03
NOAAPort configuration after combining GOES feeds.
Combined GOES 1.544 Mbits/sec
OCONUS 772Kbps
TG 1.544 Mbits/sec
DVB-S Test Signals 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
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.