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National Environmental Satellite, Data, and Information Service (NESDIS) . Low-Rate Information Transmission (LRIT) IMPLEMENTATION and TRANSITION PLAN December 10, 2002. NESDIS LRIT Implementation Plan. Background

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national environmental satellite data and information service nesdis

National Environmental Satellite, Data, and Information Service (NESDIS)

Low-Rate Information Transmission (LRIT)

IMPLEMENTATION and TRANSITION PLAN

December 10, 2002

slide2

NESDIS LRIT Implementation Plan

  • Background
    • CGMS-XIX (1991) . . . Concept of replacement/growth of Weather Facsimile (WEFAX) initiated
    • CGMS-XXVI (1998) . . . Digital Low-rate Information Transmission (LRIT) on Geostationary Meteorological Satellites committed to by all participants - except the United States
      • Implementation planning dates established
          • Satellite and Launch Date
    • CGMS-XXVII (1999) . . . U.S. announced plans for LRIT on GOES I-M/January 2003
slide3

NESDIS LRIT Implementation Plan

  • LRIT Technical Development
    • Primary CONCERNS voiced by WMO in behalf of the ‘user community’
      • Costs of LRIT receiving equipment - “affordable”
      • Lead time for transition to LRIT
      • LRIT Content
slide4

NESDIS LRIT Implementation Plan

  • Receive Equipment Costs
    • Spacecraft Transponder Output Power [EIRP]
    • CCSDS Format & Forward Error Correcting Coding
    • Enhanced Data Sets
    • User-Terminal Processing
  • Transition Lead Time and Methods
    • 2-years away from a full Operational LRIT on GOES
    • A single GOES cannot support simultaneous WEFAX/LRIT. . . It will be WEFAX-OR-LRIT!
slide5

NESDIS LRIT Implementation Plan

  • LRIT Content
    • Operator Controlled
    • “Day-1” will be the current WEFAX Product Set
    • “Day-2” will be determined by the NESDIS/NWS Satellite Products and Service’s Review Board (SPSRB) Services Oversight Panel
slide6

NESDIS LRIT Implementation Plan

  • THE PLAN --
    • NESDIS performed a study to determine the architecture and resources necessary to produce the LRIT Service. (April 2001)
      • Systems requirements definition and analysis, including architectures, costs, and schedules
      • Product generation requirements (NESDIS and non-NOAA satellite imagery and products, and NWS forecast and model products)
      • “User” Transition Concept for conversion from WEFAX
        • Traditional end-User, and user-station manufacturers
slide7

NESDIS LRIT Implementation Plan

  • THE PLAN -- (continued)
    • NESDIS developed prototype LRIT receiver requirements (November 2002)
    • NESDIS made information available on the “Impacts” of LRIT on present (WEFAX) user-stations (December 2002)
    • NESDIS defined the “Day-1” Product Suite (December 2001)
slide8

NESDIS LRIT Implementation Plan

  • THE PLAN -- (continued)
    • NESDIS provided detailed LRIT Test Transmission Content and Schedule (November 2002)
    • NESDIS will announce to the WMO and the User Community the final schedule for transition to and operation of LRIT (November 2002)
slide9

NESDIS LRIT Implementation Plan

  • THE PLAN -- Technical Milestones
    • NESDIS conducted an evaluation/validation of the LRIT communications performance -- spacecraft transponder, transmission format, and receiver systems requirements (April 2001)
    • NESDIS LRIT uplink/downlink test system

(October 2001)

    • NESDIS provides live LRIT test transmissions through a spare GOES
slide10

NESDIS LRIT Implementation Plan

  • THE PLAN -- Technical Milestones
    • Operational LRIT begins on GOES-EAST
      • January 2003 (Alternating LRIT and GOES-EAST WEFAX transmissions)
    • Operational LRIT begins on GOES-WEST
      • As soon as practical after May 2003 (Alternating LRIT and GOES-WEST WEFAX transmissions)
slide11

NESDIS LRIT Implementation Plan

  • Three Major issues are currently being worked by NESDIS to ensure successful implementation and utilization of NOAA LRIT services:
    • Validation and Testing of LRIT Communications Parameters
    • Design and Implementation of NOAA LRIT Ground Systems
    • Development and Availability of Affordable LRIT User-terminals
slide12

NESDIS LRIT Implementation Plan

  • Communications Parameters
    • NESDIS RF Test Equipment, supplemented by METEOSAT LRIT Test and User-terminal Ground Systems
    • Spare in-orbit GOES-I/M Spacecraft
    • GOES-N Spacecraft in-plant at Boeing
    • NOAA LRIT Ground Processing System
    • Prototype NOAA LRIT user terminal
slide13

NESDIS LRIT Implementation Plan

  • NOAA LRIT Ground System
    • Architecture Definition and Design Completed
    • Contractual Mechanisms in-place for Implementation
    • “Day-1” Products Exist
    • Data Communications Links Exist
slide14

NESDIS LRIT Implementation Plan

  • Affordable User Terminals
    • European and Japanese versions exist
    • Chip-sets reduce front-end receive system risks
    • NESDIS working with the manufacturer to provide early, stable requirements for development
slide15

USA Plan of Satellite Operation and Data Dissemination

Operational Back-up

2000

2001

2002

2003

2004

2005

2006

2007

2008

2009

2010

GOES-8

Operational

Back-up

GOES-10

Operational

Test

GOES-11

Launch

Test

Operational

GOES-12

Launch

Operational

Test

GOES-N

Launch

WEFAX

WEFAX/

LRIT

LRIT