National Weather Service United States Department of Commerce

Bitter Wind Chills Gradually Easing in the Northeast; Pacific Storms Approach the West

Winds and bitter wind chills will moderate as a strong low pressure system slowly pulls away from the northeast. An approaching Pacific system will spread lower elevation rain and heavy mountain snow across the West, especially in the Sierra-Nevada mountains. High winds from strong high pressure in the Great Basin will produce high winds for portions of Montana. Read More >

NESDIS is preparing to replace a GOES-N series satellite with a GOES-R series satellite.

  • GOES-R (GOES 16) launched November 19, 2016 and will be operational in 2017.
  • GOES-R HRIT/EMWIN transponder will replace the GOES-N EMWIN transponder.

NWS is consolidating the management of dissemination services, under a program called the Integrated Dissemination Program (IDP)

  • Objective: sustainable, consolidated enterprise architecture; reduced costs
  • Operations centers located in:
    • ‚ÄčCollege Park, MD
    • Boulder, CO

IT Security threats require NOAA to periodically updating controls and procedures to minimize the risk of potential EMWIN operational impacts.


Transitioning HRIT/EMWIN from GOES-N to GOES-R (NESDIS-1)

Improved data products for hemispheric re-transmission

  • Faster full disk images: between 15 and 30 minutes
  • Warnings, Watches, Tropical Storm Information
  • Copy of GOES Data Collection System (GOES DCS)

Requires new antenna and receiver hardware

  • Receiver frequency shift to 1694.1 MHz from:
    • EMWIN 1692.7 MHz and LRIT 1691.0
  • BPSK Modulation; EMWIN shift from Offset QPSK
  • Data Rate to a combined 400 Kilobits per Second from: EMWIN: 19.2 Kbps and LRIT : 128 Kbps (combined 147.2)

Documents and updates to be posted on the GOES-R web site:

NOTES: GOES-R: HRIT = High Rate Information Transmission ~ 400 kbps (combined transmission rate)
               GOES-N: LRIT = Low Rate Information Transmission ~ 128 kbps


Transition from LRIT and EMWIN to HRIT/EMWIN


On GOES –N Series
On GOES-R Series
Full Disk, NH, SH images 3 Hourly Full Disk; .5 hour
NH/SH; follows GOES
East/West Schedule. RSO issue
Variable but planned 3
Channels of Full Disk every
15 minutes
Modulation LRIT BPSK
Receiver Center Frequency LRIT 1691.0 MHz (L-Band)
EMWIN 1692.7 MHz (L-Band)
1694.1 MHz (L-Band)
Data Rate LRIT 128 Kbps
EMWIN 19.2 Kbps
400 Kbps
Antenna Coverage Earth Coverage to 50
Earth Coverage to 50
Imagery Data Sources GOES-N Imager (IR,VIS,WV)
MTSAT Imager
ABI (3 or more bands)
HBI (3 bands hourly-GOES W
EMWIN Products Full Suite of Current Products
Combined w/ LRIT Products
GOES DCS Copy of DCS observations
Copy of observations