National Weather Service United States Department of Commerce

Storm System Continues To Impact Southern California, Severe Weather Threatens The Southern And Eastern U.S.

A storm system will deliver heavy mountain snow and rainfall to southern California and the Desert Southwest through late week. The heavy rainfall may pose a flash flood risk, especially to burn scar locations. Severe thunderstorms capable of damaging winds, hail, and tornadoes will be possible from the Southern Plains to the Mississippi Valley, Mid South, and Mid Atlantic through Wednesday. Read More >

Why EMWIN is Transitioning


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
(NESDIS-3)

 

  LRIT / EMWIN
On GOES –N Series
HRIT/EMWIN
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
EMWIN offset QPSK
 
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