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International Laser Ranging Service

A service of the International Association of Geodesy

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Quick Links

  • Network Map
  • List of Stations
  • Monthly Report Card
  • Quarterly Report Card
  • Network Status Page
  • Potsdam CPF time bias service
  • Procedure for estimating laser beam divergence
  • Recent Station Upgrades
  • Network station application form
  • Revised ILRS station screening process at ILRS Operations Centers (NASA and EDC)

Monthly Station Performance Assessment

May 1, 2020 through April 30, 2021

Please note the following:

  • On maps that depict performance with differently sized "bubbles", the size of the bubble does not reflect coverage of what's tracked but to what extent the parameter is met.
  • Stations that are not capable of ranging to GNSS are not assessed on GNSS parameters; furthermore, these stations are not assessed on their compliance to the ILRS priority list because the list includes GNSS satellites.

Available maps:

Click on a map title to view map. Click again on map tile to close map.

While viewing a map, hover over a station with your mouse to view information for that station.

General

  • Comprehensive Score
  • Number of Lunar Passes Tracked (Note: this is not a requirement, it only shows who participates in LLR tracking)
  • Total Number of Passes: 3500 Minimum (Note: this requirement needs to be discussed by the ILRS CB)
  • Total Number of Passes (All Satellites) - Percentage of ILRS standard
  • Total Normal Points per Pass (All Satellites)

Priority List Adherence

  • Minimum of 1% of Passes Tracked are from the Top 10 Satellites on the Priority List: 1% Minimum
  • Minimum of 15% of Passes Tracked are from the Top 20 Satellites on the Priority List: 15% Minimum
  • Percentage of Satellites Tracked not on the Priority List: 35% Maximum
  • Percentage of Distinct Satellites on the Priority List Tracked: 25% Minimum

Altimetry

  • Total Number of LEO Passes: 2300 Minimum
  • Total Number of LEO Passes: 2300 Minimum - Percentage of ILRS standard
  • LEO Number of NPT per Pass: 8 Minimum

Geodetic

  • Tracked all LAGEOS and LARES
  • Total Number of LAGEOS Passes: 600 Minimum
  • Total Number of LAGEOS Passes: 600 Minimum - Percentage of ILRS standard
  • Total Number of LAGEOS-1 Passes: 200 Minimum
  • Total Number of LAGEOS-1 Passes: 200 Minimum - Percentage of ILRS standard
  • Total Number of LAGEOS-2 Passes: 200 Minimum
  • Total Number of LAGEOS-2 Passes: 200 Minimum - Percentage of ILRS standard
  • Total Number of LARES Passes: 200 Minimum
  • Total Number of LARES Passes: 200 Minimum - Percentage of ILRS standard

Etalon

  • Tracked all Etalon
  • Total Number of Etalon Passes: 50 Minimum
  • Total Number of Etalon Passes: 50 Minimum - Percentage of ILRS standard
  • Etalon Number of NPT per Pass: 3 Minimum

GNSS

  • Tracked All GNSS Constellations: Compass, Galileo, GLONASS
  • GNSS Number of NPT per Pass: 3 Minimum
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  • Last modified date: Feb 9, 2021
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