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Projects > S - U > SGP

Preferred term

SGP  

Definition

  • The global geodetic infrastructure is comprised of several networks and individual ground stations for: Very Long Baseline Interferometry (VLBI), Satellite Laser Ranging (SLR), Global Navigation Satellite Systems (GNSS), and Doppler Orbitography and Radiopositioning Integrated by Satellite (DORIS). NASA's Space Geodesy Program contributes to the global infrastructure through the deployment, operation, and maintenance of two coordinated networks: the NASA Space Geodesy Network (NSGN) of collocated VLBI, SLR, GNSS, and DORIS stations, and the NASA Global GNSS Network (GGN). The data produced by these networks is used for a variety of products, including: the definition of the International Terrestrial Reference Frame (ITRF), measurement of the Earth Orientation Parameters, and satellite precision orbit determination. The data and products from these networks are also used to support a broad range of scientific and societal applications in areas such as Earth observations, positioning, navigation, and timing. Many of the geodetic stations are decades old and are not capable of meeting future requirements. The US National Research Council (NRC) Committee on Earth Science and Applications from Space concluded in 2007 that: "The geodetic infrastructure needed to enhance or even to maintain the terrestrial reference frame is in danger of collapse." NASA and many other international government agencies are responding to this conclusion by making new investments to modernize and expand their geodetic infrastructure. The Space Geodesy Program is implementing NASA's response to the NRC recommendation by sustaining and operating NASA's legacy Space Geodesy Networks while executing the construction, deployment, and operation of the next generation Space Geodesy stations that will be part of a new NSGN. The Space Geodesy Project (SGP) deployment strategy is guided by the recommendations of the NRC Committee on the National Requirements for Precision Geodetic Infrastructure, as well as the plans of other nations for contributing to the Global Geodetic Observing System (GGOS). One of the main objectives of the SGP is to produce the necessary observations to realize a Terrestrial Reference Frame that has an accuracy of 1 mm (decadal scale) with stability at 0.1 mm/year (annual scale). This is an ambitious goal, as it represents an order of magnitude improvement over the current capability. NASA's Space Geodesy Program encompasses the development, deployment, operation, and maintenance of a global network of space geodetic observatories consisting of geodetic and associated instruments, a data collection and transfer system, analysis, and the public dissemination of data products required to maintain a stable terrestrial reference system, measure the Earth Orientation Parameters, and support NASA’s missions and the scientific community. (en)

Broader concept

Change note

  • 2020-03-19 15:53:00.0 [tstevens] Insert Concept add broader relation (SGP [2cbdad6d-0b9b-4614-a223-e4ed430f1bc9,559875] - S - U [4eb1894b-35b4-406b-8864-944a42bc7702,547487]);
  • 2020-03-19 15:55:31.0 [tstevens] insert AltLabel (id: null category: primary text: Space Geodesy Project language code: en); insert Definition (id: null text: The global geodetic infrastructure is comprised of several networks and individual ground stations for: Very Long Baseline Interferometry (VLBI), Satellite Laser Ranging (SLR), Global Navigation Satellite Systems (GNSS), and Doppler Orbitography and Radiopositioning Integrated by Satellite (DORIS). NASA's Space Geodesy Program contributes to the global infrastructure through the deployment, operation, and maintenance of two coordinated networks: the NASA Space Geodesy Network (NSGN) of collocated VLBI, SLR, GNSS, and DORIS stations, and the NASA Global GNSS Network (GGN). The data produced by these networks is used for a variety of products, including: the definition of the International Terrestrial Reference Frame (ITRF), measurement of the Earth Orientation Parameters, and satellite precision orbit determination. The data and products from these networks are also used to support a broad range of scientific and societal applications in areas such as Earth observations, positioning, navigation, and timing. Many of the geodetic stations are decades old and are not capable of meeting future requirements. The US National Research Council (NRC) Committee on Earth Science and Applications from Space concluded in 2007 that: "The geodetic infrastructure needed to enhance or even to maintain the terrestrial reference frame is in danger of collapse." NASA and many other international government agencies are responding to this conclusion by making new investments to modernize and expand their geodetic infrastructure. The Space Geodesy Program is implementing NASA's response to the NRC recommendation by sustaining and operating NASA's legacy Space Geodesy Networks while executing the construction, deployment, and operation of the next generation Space Geodesy stations that will be part of a new NSGN. The Space Geodesy Project (SGP) deployment strategy is guided by the recommendations of the NRC Committee on the National Requirements for Precision Geodetic Infrastructure, as well as the plans of other nations for contributing to the Global Geodetic Observing System (GGOS). One of the main objectives of the SGP is to produce the necessary observations to realize a Terrestrial Reference Frame that has an accuracy of 1 mm (decadal scale) with stability at 0.1 mm/year (annual scale). This is an ambitious goal, as it represents an order of magnitude improvement over the current capability. NASA's Space Geodesy Program encompasses the development, deployment, operation, and maintenance of a global network of space geodetic observatories consisting of geodetic and associated instruments, a data collection and transfer system, analysis, and the public dissemination of data products required to maintain a stable terrestrial reference system, measure the Earth Orientation Parameters, and support NASA’s missions and the scientific community. language code: en);

URI

https://gcmd.earthdata.nasa.gov/kms/concept/2cbdad6d-0b9b-4614-a223-e4ed430f1bc9

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