[Internal] Landsat 9 support in ENVI 5.6.2
MariM
ENVI 5.6.2 currently supports three flavors of Landsat-9 data available from the USGS:
Landsat Collection 2 Level-1 data:
starts with "LC09_L1TP_", "LO09_L1TP_", or "LT09_L1TP_" where
LC - Combined OLI-2 and TIRS-2
LO - OLI-2 Only
LT - TIRS-2 Only
ends with "_T1" or "_T2" for Tier 1 and Tier 2 data products
opened with *_MTL.txt and uses the IDLcfSvcOpenLandsatGeoTIFFWithMetadata open file service.
Landsat Collection 2 Level-2 data:
starts with "LC09_L2SP_", "LO09_L2SP_", "LT09_L2SP_" where
LC - Combined OLI-2 and TIRS-2
LO - OLI-2 Only
LT - TIRS-2 Only
ends with "_T1" or "_T2" for Tier 1 and Tier 2 data products
opened with *_MTL.txt and uses the IDLcfSvcOpenLandsatCollection open file service.
Landsat C2 U.S. Analysis Ready Data (ARD):
starts with "LC09_CU" for "Continental US" and "LC09_AK" for "Alaska" and "LC09_HI" for "Hawaii"
contains some or all of:
SR - Surface Reflectance
ST - Surface Temperature
TOA - Top Of Atmosphere Reflectance/Angles/Brightness Temperature
QA - Quality layers
opened with *.xml and uses the IDLcfSvcOpenLandsatCollection open file service.
note that the schema of this .xml/.json file is new and similar-but-different to the other
Landsat Collection schema we previously supported.
Links:
All three of these examples datasets are from the Eros Data Center's Earth Explorer:
Note that you will need an account with the USGS in order to download data.
https://earthexplorer.usgs.gov/
General Landsat-9 information can be found:
https://landsat.gsfc.nasa.gov/satellites/landsat-9/
Note that wavelengths and fwhm values for Landsat-8 and Landsat-9 satellites are now stored in our
"sensor_attributes.json" file located in resource/filterfuncs.
Landsat-8 uses the "SENSOR_TYPE" of "Landsat OLI" and "Landsat TIR".
note: it should have been "TIRS", not "TIR"
Landsat-9 uses the "SENSOR_TYPE" of "Landsat OLI-2" and "Landsat TIRS-2"
There are filter functions for both OLI-2 and TIRS along with CIRRUS as well.
- created by MM 9/1/2022