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PNSWSH

 

Service Change Notice 17-120

National Weather Service Headquarters Silver Spring, MD

150 PM EST Wed Nov 22 2017

 

To:       Subscribers:

          -NOAA Weather Wire Service

          -Emergency Managers Weather Information Network

          -NOAAPORT

          Other NWS partners and NWS employees

 

From:     Craig Hodan

          Chief, NWS Dissemination Systems Team

 

Subject:  GOES-14 Emergency Managers Weather Information Network

          Broadcast Available on or before December 11, 2017

 

On or before December 11, 2017, the Emergency Managers Weather

Information Network (EMWIN) broadcast from GOES 14 will be

activated and remain active for 6 months. The broadcast from

GOES-14 provides GOES-East users an additional opportunity to

continue to use their existing EMWIN satellite receivers and

software while making preparations for transitioning to the new

HRIT/EMWIN broadcast. The broadcast is scheduled to become

operational between December 14-20, 2017, when GOES-16 replaces

GOES-13 at the GOES-East station at 75.2 degrees West.

 

Service Change Notice 17-91 of July 28, 2017, provided

information on the transition from GOES-13 to GOES-16: 

 

http://www.nws.noaa.gov/os/notification/scn17-91emwin_goes.htm

 

GOES-14 is expected to remain in its present geosynchronous

orbit at 105 degrees West throughout this service period.  

 

Below are the GOES-14 EMWIN broadcast characteristics:

 

Frequency:    1692.7 MHz, linear polarization

Modulation:   PCM/NRZ-L/Offset QPSK

Data rate:    35940 ksps, 19200 bps CCSDS coding

Data format:  EMWIN Quick Block Transfer (QBT) packets

 

The GOES-14 EMWIN Broadcast will terminate on or about June 13,

2018. Before the broadcast ends, users should either reorient

their antennas to the GOES-15 (GOES-West) satellite at 135

degrees West to continue receiving the broadcast -- providing

the receiving stations is within the GOES-West satellite

footprint and has antenna direct line-of-sight to the satellite;

or (b) employ the new HRIT/EMWIN antennas, receivers and

software to receive the EMWIN broadcast on HRIT/EMWIN Virtual

Channels 20, 21, and 22, from the GOES-East satellite located at

75.2 degrees West.

 

The GOES-West satellite, GOES-15, is scheduled to be replaced by

GOES-S in the fall of 2018, introducing the HRIT/EMWIN broadcast

to GOES-West users and terminating the legacy EMWIN Offset QPSK

broadcast.

 

For more information, please contact:

 

nws.emwin.support@noaa.gov

 

 

National Service Change Notices are online at:

 

http://www.weather.gov/os/notif.htm

 

 

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