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  3. AOP Lidar Data Quality Notification - Update

Data Notification

AOP Lidar Data Quality Notification - Update

January 13, 2023

This is an update to the earlier data notification, "AOP Lidar Data Quality Notification" in September 2022, which notified users of high noise levels and improper classification of that noise in lidar data collected with the Optech Galaxy Prime sensor.

Fewer sites were affected than were posted in the original Data Notification, however all of the AOP data products were affected. Because the Spectrometer and Camera data products use the DTM generated by the Lidar sensor in the orthorectification process, these data products are being updated as well. Table 1 below summarizes a complete list of the affected data products, and Table 2 provides an updated list of the sites and publication months which will be corrected.

Teledyne Optech has provided some noise-filtering routines in their Lidar Mapping Suite software, which AOP is implementing to remove excess noise and improve noise classification for the affected sites. Provisional data products from 2021 are currently being updated and are expected to be completed by the end of January 2023 as part of RELEASE-2023. There will be a short period of time in January (expected 2-5 business days) when the data will not be available, while we are replacing the affected data with the corrected data.

Please use the Contact Us form for further inquiries regarding this issue, or if you are interested in the status in a specific site listed below and include the term "INC0059048" in the body of your request.

Table 1: Affected data products

Data Product IDs Data Product Name
DP1.30003.001 Discrete return LiDAR point cloud
DP1.30001.001 LiDAR slant range waveform
DP3.30024.001 Elevation - LiDAR
DP3.30025.001 Slope and Aspect - LiDAR
DP3.30015.001 Ecosystem structure
DP1.30008.001 Spectrometer Orthorectified at-Sensor Radiance
DP1.30006.001, DP3.30006.001 Spectrometer Orthorectified Surface Directional Reflectance (Level 1 and 3)
DP2.30012.001, DP3.30012.001 LAI – Spectrometer (Level 2 and 3)
DP2.30014.001, DP3.30014.001 fPAR - Spectrometer (Level 2 and 3)
DP2.30019.001, DP3.30019.001 Canopy Water Content (Level 2 and 3)
DP2.30026.001, DP3.30026.001 Vegetation Indices – Spectrometer (Level 2 and 3)
DP1.30010.001, DP3.30010.001 High-resolution Orthorectified camera imagery (Level 2 and 3)

Table 2: Affected sites and years

Domain Site Publish Year-Month Release Status
D17 SOAP 2021-07 PROVISIONAL
D17 TEAK 2021-07 PROVISIONAL
D03 OSBS 2021-09 PROVISIONAL
D03 DSNY 2021-09 PROVISIONAL
D11 OAES 2022-05 PROVISIONAL
D02 SCBI 2022-05 PROVISIONAL

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Related Posts:

Combining Lidar and Hyperspectral Data to Understand Plant Biodiversity
October 19, 2022
AOP Data Availability Notification: Resolved
September 29, 2022
NEON Data Release 2023 is available
January 27, 2023
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