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A Proposal to Update LRIT to Provide Reliable Rebroadcast Tool for GOES DCS Information Update for TWG PowerPoint Presentation
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A Proposal to Update LRIT to Provide Reliable Rebroadcast Tool for GOES DCS Information Update for TWG . Kay Metcalf NOAA GOES DCS Program Manager May 12, 2011. GOES DCS Rebroadcast. Currently Provided through Commercial DOMSAT contract

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A Proposal to Update LRIT to Provide Reliable Rebroadcast Tool for GOES DCSInformation Update for TWG

Kay Metcalf

NOAA GOES DCS Program Manager

May 12, 2011

goes dcs rebroadcast
GOES DCS Rebroadcast
  • Currently Provided through Commercial DOMSAT contract
  • Has Worked Well for Many years but has become logistically cumbersome
    • Contract Mechanism to Encourage Free and Open Competition Makes it Difficult to Manage User Transitions Required
      • Requiring Technology Continuity Restricts Competition to only one vendor
    • Coverage Restricted to Continental U.S.
    • Cost otherwise would most likely be prohibitive
    • Vendor currently providing more coverage, but is “at will”
      • Could be changed at any time because contract does not require hemispheric coverage
    • Exchanging fund between government agencies to fund contract has become very difficult

NOAA GOES DCS

domsat status
DOMSAT Status
  • Final Option Year of DOMSAT contract exercised
  • Beginning new one year bridge contract
    • Paperwork in progress
  • 2011 (Sept) funded by NOS, USGS, BLM, BR and USACE
    • MOU’s set up for BLM and USACE (amendments in progress)
    • MOU in progress for BR
    • USGS made “quid pro quo” arrangement with NOS
    • NOS funds directly tapped through procurement documents (means no MOU required)
    • NESDIS (Kay’s office) providing $12k
  • NESDIS will combine all DOMSAT service contracts for 5 year follow on contract
  • Suggested Changes to LRIT makes it viable replacement

NOAA GOES DCS

low rate information transfer lrit
Low Rate Information Transfer (LRIT)
  • GOES Rebroadcast of NESDIS products
    • Primary Function to provide user access to NESDIS satellite products at low cost
    • “Packetized format”
      • Information Packaged in Small Files
    • GOES DCS Rebroadcast Provided to provide low cost reception of data to platform owners
  • Products created at NOAA Satellite Operations Facility (NSOF) in Suitland, MD
  • Transferred to WCDA via land lines
  • Transmitted to satellite at Wallops

NOAA GOES DCS

goes dcs into lrit
GOES DCS Into LRIT
  • Uses an LRGS client with username “LRIT”
    • Originally implemented because DAPS code could not be modified
    • LRGS located at Wallops
    • LRGS user makes request to WCDA for data every 30 seconds
    • File created and transferred to LRIT system in Suitland
    • Inserted into LRIT stream at Suitland
  • LRIT stream transferred to WCDA
  • Infamous “double hop”

NOAA GOES DCS

vulnerabilities
Vulnerabilities
  • Priority assignments could provide conflicts when system fully loaded (not seen yet)
    • Currently DCS Random has Priority “1”
    • Regular DCS has Priority “2”
    • Must be integrated with standard LRIT data stream (i.e. images)
  • LRGS is separate process for technical staff to monitor
  • Interfaces unclear
    • Sometimes WCDA thinks LRIT is down
    • Sometimes LRIT technicians think “DCS” is down
    • An extra step for technicians to remember
      • Manual restart process required in case of nonstandard actions like reboot

NOAA GOES DCS

recommendation for dcs insert into lrit
Recommendation for DCS Insert into LRIT
  • DADDS is DCS Standard Distribution System
  • LRIT stream similar to DOMSAT and NWSTG streams
  • Provide “spicket” to feed LRIT from DADDS
  • ADVANTAGES:
    • Only one platform to maintain
    • Only one process to restart
  • DADDS from NSOF insert DCS into LRIT
  • Backup LRIT at WCDA can be fed by WCDA DADDS
    • IF LRIT at NSOF goes down WCDA will pick up operations

NOAA GOES DCS

recommendation to remedy priority concerns
Recommendation to Remedy Priority Concerns
  • LRIT system on GOES-R renamed “HRIT/EMWIN”
    • Data rate faster so “High Rate” instead of “Low Rate”
    • Emergency Managers Weather Information Network (EMWIN) stream combined
  • Proposal to GOES-R from LRIT, EMWIN and DCS programs:
    • Provide virtual channels for each service
      • HRIT will have one stream
      • EMWIN will have one stream
      • DCS Rebroadcast will have one stream
      • Each service given channels based on predefined bandwidth
      • Priorities for each service will be determined within those bands by the program (DCS will define priorities for their portion of uplink, etc.)

NOAA GOES DCS

status of goes r proposal
Status of GOES-R Proposal

Integrated Product Team (IPT) formed

Initial discussions begin

Funding not yet Confirmed to Build Ground System

NOAA GOES DCS

next steps for dcs
NEXT Steps for DCS
  • Closely monitor HRIT/EMWIN Discussions
    • DCS team members on IPT
  • Close to Decision within a few months
  • Begin Analysis of Changes Required for Receivers Quickly
    • High hopes that not many changes required
  • Continue Existing DOMSAT contract for 5 years to allow time for Transition

NOAA GOES DCS