NASA will be performing network maintenance on Wednesday, November 20, 2024, between 11:00 AM EST and 1:00 PM EST (16:00 to 18:00 UTC). There will be two periods of about five minutes of disruption. During these peroids, the ILRS website will be unavailable during the outages. If you experience problems outside this window, contact support-cddis@nasa.gov.

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ILRS Data Screening Procedure

This ILRS Operations Centers (OCs) at EDC and NASA have recently updated (as of August 15, 2019) their data screening process to coordinate data QC and provide feedback on data issues to the stations. Incoming data are now screened and characterized as:

  • "errors" if they will adversely impact the quality of the data and the derived data products (e.g., invalid date, invalid satellite, erroneous calibration, etc.)
  • "warnings" if the impact on the quality of the data is minor, or if there are format errors that make processing or QC evaluation more difficult.

Data that are marked as error are not submitted to the ILRS Data Centers at EDC and CDDIS; data marked as warning are submitted. The OCs will forward any diagnostics to the stations on a routine basis for necessary action. Stations should address the error issues immediately. Both ILRS OCs now use the same criteria for screening the incoming data.

The list of the new data QC implemented at the OCs (categorized as errors or warnings) is available.