Emergency Managers Weather Information Network in the GOES-N Era: a Status Report

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Emergency Managers Weather Information N
etworkin the GOES-N Era a Status Report

• Satellite Direct Readout Conference for the
  Americas
• Miami, Florida
• December 10, 2002
• Lloyd E. Irvin (NOAA/NWS)

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EMWIN

• A system to provide timely watches, warnings, and
  forecasts to the nations emergency managers
  using NOAAs GOES satellites and low cost user
  receive systems
• EMWIN is broadcast from GOES East and GOES West
• EMWIN will be impacted as current GOES satellites
  are replaced by newer satellites

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EMWIN in GOES-N EraChanges

• Reduced broadcast power
• Complies with ITU power levels
• Mitigated by use of Forward Error Correction and
  higher-order modulation
• Broadcast frequency change
• From 1690.725MHz To 1693.500MHz

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Impacts on Users

• Receiving site changes required
• Upgrade for FEC and modulation
• Accommodation for frequency change
• Receiving site antennas
• Above 5o no change
• Below 5o may require a larger antenna

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GOES East (75oW), Goes West (135oW)Visibility
Contours
Outer Ring is 5o Elevation Angle
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Transition to GOES-NGuiding Principles

• Minimize impacts on users
• Maintain at least the same level of service
• Ensure EMWIN vendors are ready
• Inform users of changes and schedule
• Ensure graceful transition
• Provide adequate time for users and NOAA to make
  changes
• Avoid abrupt changes

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Transition to GOES-NApproach

• Formed joint NESDIS/NWS coordination group
• Actively planning the transition activities
• NESDIS coordinating with receiver manufacturers
• Sponsoring FEC and modulator prototype
  development
• Fostering low cost receive systems through
  testing opportunities
• NESDIS providing pro-active user community
  coordination
• NWS providing timely user information

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Transition to GOES-NCoordination Group Activities

• Recommended to NESDIS management the operation of
  a parallel broadcast of GOES-N EMWIN from a
  normally stored third satellite before GOES-N
  becomes operational
• Developing a Transition Plan based on third
  satellite approach to provide date-certain start
  of a parallel broadcast

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Transition to GOES-NReceive System Development

• EMWIN system manufacturer developing prototype
  hardware solution using
• BPSK (Binary Phase Shift Key) modulation
• American Hardware Architectures TurboCoding
  Forward Error Correction
• Hardware solution experiencing technical problems

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Transition to GOES-NReceive System Development

• NESDIS contractor developing PC software solution
• Processing to be hosted on inexpensive PC
• Uses processors of 1 GHz or more
• Should be widely configurable for third party
  applications (DLL)
• Provides complete tuning capability

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Transition to GOES-NNext Steps

• Test software solution

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Transition to GOES-NUser Information Updates

• Periodic general User Notification Administrative
  Messages
• EMWIN Web site
• http//iwin.nws.noaa.gov/emwin
• Related User Conferences in 2003
• NWS annual Partners Workshop Summer
• Annual emergency managers conferences Fall