News DEA Tech Alerts: Outages, Errors & Updates

Digital Earth Australia's Tech Alerts: Keep up with the latest info on outages, errors & updates

Published:12 September 2022

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Upgrade Alert: Sentinel 2 Collection 3 Upgrade

DEA’s Sentinel 2 ARD product (Surface Reflectance) upgrade from C1 to C3 nears completion

Upgrade will bring the packaging of the Sentinel ARD product in line with GA’s Landsat C3, implement a maturity concept to simplify the user experience and supply a Sentinel specific cloud mask.   

STATUS - RESOLVED

Analysis Ready Data Outage - Landsat 8 definitive data now available; issue being monitored

12 Sept, 2022Issue corrected. 

19 Aug, 2022 -  DEA unable to download and process Landsat 8 ARD definitive data

  • Background

    DEA accesses Landsat data from the United States Geological Survey (USGS), which we process into our Analysis Ready Data (ARD). The data feed from USGS that provides DEA with Landsat 8 level 1 T1/T2 data has had no new data since 25th August 2022. We have reported this issue to the USGS and are working with them to resolve it.

    DEA has not been able to download and process Landsat 8 ARD definitive data with a satellite acquisition date later than since the 19th August 2022.

    We will advise when this data feed will be restored.

  • Which Products are affected?

     

    Note: Statistical products such as DEA Water Observations annual summaries and Fractional Cover Percentiles will be unaffected by the outage. 

  • What does this mean for DEA Users?

    The Landsat 8 data feed will be back processed as soon as the issue is resolved. Data is still available from Sentinel 2 during this time.

    We will provide an update to this notice when we have a clearer timeline on restoring the Landsat 8 data feed.

    If you have any questions about the above please email us at earth.observation@ga.gov.au

STATUS - RESOLVED

Analysis Ready Data Outage - Bidirectional Reflectance Distribution Function now available; issue being monitored

1 Sept, 2022 - Issue corrected; collections expected to be back to normal by 9 Sept, 2022. 

19 July, 2022 - DEA prevented from producing final versions of datasets for world-leading ARD products. 

  • Background

    One of the key inputs to DEA’s Analysis Ready Data algorithms - Bidirectional Reflectance Distribution Function (BRDF) - has been unavailable since 19th July.  This has prevented DEA from producing final versions of datasets for our ARD products.

    We have rolled back to a simplified ARD production method to ensure continuity in data availability.  Unfortunately, this simplified method increases uncertainty in the accuracy of our products slightly.

    However, for most applications this change will go unnoticed.

  • Which Products are affected?

    Note: Statistical products such as DEA Water Observations annual summaries and Fractional Cover Percentiles will be unaffected by the outage. 

  • What does this mean for DEA Users?

    We recommend that if you have any major statistical analyses you intend to perform as a one-off, you consider whether you can wait for the definitive product to become available. Otherwise, continue as you were.

    Once our BRDF data feed is back up and running we’ll replace affected products with the definitive data. We expect to have our collections back to normal by 9 September.

    If you have any questions or feedback please email us at earth.observation@ga.gov.au

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