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NOAAPORT Update History
This page provides
a chronology of updates and additions made to the NOAAPORT User's Page.- The
AWIPS/NESDIS ICD, which describes the interface for the GINI-format GOES imagery,
originating at NESDIS and flowing through the NCF to the SBN's GOES channels,
has been updated to reflect polar imagery identifications for the i1 i2 in the
header; satellite sub-point latitude and longitude; satellite height; upper right
hand corner latitude and longitude points; additional satellites were added to
the list; additional possible sectors; also, a new table was added that provides
size and specifications of the polar satellite sectors. The Document Number AA0130008
CH-5, dated December 1, 2005, can be downloaded from the "NOAAPORT
References" page.
- NOAAPORT EVOLUTION PLAN (Updated April 2005)
– The old NOAAPORT T1 circuit technology has been replaced with an open standard,
open source, scalable design, specifically Digital Video Broadcast- Satellite
(DVB-S). With deployment of DVB-S, the NOAAPORT broadcast can be easily upscaled
to meet the demand when new science data becomes available and delivery to the
NWS field is required.
The transition from the old T1 technology to the
new DVB-S technology has been accomplished in phases.
Phase 1: Post
a technical report on the NOAAPORT web page GOES
and Non-GOES Imagery Product Compression Approach for External NOAAPORT Satellite
Broadcast Network Users which describes the open source (zlib) compression
algorithm and a method to decompress zlib compressed data [April 03]. Note, Zlib
is already used to compress NEXRAD radar data over NOAAPORT. Sample zlib compressed
GOES products routinely transmitted over both GOES East and GOES West channels
for NOAAPORT users to test with. [Complete]
Phase 2: Compress all products
on both GOES East and GOES West using the open source (zlib) compression algorithm.
[Complete]
Phase 3: Combine both GOES East and GOES West data feeds
on both GOES East and GOES West channels. [Complete]
Phase 4: Cease
transmission of GOES data on either the former GOES East or former GOES West channel
(specific channel to be determined at a later date). [Complete]
Phase 5:
Begin using the satellite space from the vacated GOES channel to test the DVB-S
technology over the NOAAPORT link. [Complete]
Phase 6: Begin transmission
of additional gridded data on the new NWSTG2 channel (former GOES West channel).
This channel will use the new DVB-S technology. The new NWSTG2 gridded data will
also be compressed using the open standard JPEG2000. The specific gridded data
to be placed on NWSTG2 is to be determined. [Complete]
Phase 7: Eliminated.
Overtaken by events.
Phase 8: Transmission of NOAAPORT will begin on
a single channel with an equivalent 6 T1 capacity. The single channel will be
on the same satellite, but on a different transponder than is currently used,
using DVB-S technology. The specific transponder will be determined at a later
date. [Complete]
Phase 9: Shut down all old NOAAPORT channels. End of
all legacy NOAAPORT channels. All NOAAPORT users must have DVB-S capability by
this date. [Completed 3/31/05]
Phase 10: (Eliminated)
Phase 11:
(Eliminated)
- August 2004 - The following NOAAPORT sections have been
updated: NOAAPORT Channels, Manufacturers List, NOAAPORT Data Characteristics,
Latitude/Longitude Dimensions of Remapped GOES/Composite Imager Products (GOES
10-11), Latitude/Longitude Dimensions of Remapped GOES/Composite Imager Products
(GOES 12 and N), and Remapped AWIPS Satellite Sounder Imagery Products from NESDIS.
- April
2003 - The NOAAPORT Link Budget Parameters and Characteristics has been updated
to reflect the new increased Transmit EIRP values and the EIRP Contour, FTS Contour,
and G/T Contour charts have been replaced to reflect the actual footprint values
versus the earlier charts' predicted value.
- The NOAAPORT
User's Page was reformatted and the NOAAPORT Technical Contacts
updated on March 13, 2003.
- On November 27, 2001, the NWS added
11 new radar products from WSR-88D sites to the NOAAPORT
broadcast. Go to the NWS RPCCDS
page under Available Radar Products to view the list of NOAAPORT
products.
- After the January 1, 2001 termination of the NEXRAD
Information Dissemination Service (NIDS) agreement and the operational implementation
of the NWS Radar Products Service (RPS), the NWS began broadcasting radar products
over NOAAPORT without data encryption and in a compressed
format. The compression algorithm used is based on the zlib compression libraries.
For more information about the RPS and Radar data access over NOAAPORT
go to the NWS RPCCDS Page.
- NWS
Certifies that NOAAPORT is Operational: On November 25, 1998, Walter Telesetsky,
Director Office of Systems Operations, signed a statement certifying that the
NOAAPORT satellite broadcast is operational.
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