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

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 DCS Information Update for TWG

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  1. 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

  2. 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

  3. 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

  4. 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

  5. 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

  6. 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

  7. 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

  8. 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

  9. Status of GOES-R Proposal Integrated Product Team (IPT) formed Initial discussions begin Funding not yet Confirmed to Build Ground System NOAA GOES DCS

  10. 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

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