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Landsat Calibration Parameter Files (CPFs) provide radiometric and geometric coefficients needed for processing of raw, uncorrected Landsat image data into Level-1 data products. Over 15,000 coefficients are issued to span distinct timeframes and are updated with improved calibration coefficients. CPFs are often updated with improved coefficients.
Learn more (and search CPF files): Landsat Calibration & Validation
Landsat Collection 1 Level-1 data are not corrected for atmospheric conditions, however Landsat Science Products, which include Level-2 Surface Reflectance and Provisional Surface Temperature, and Level-3 Burned Area, Dynamic Surface Water Extent, and Fractional Snow Covered Area are atmospherically corrected.Learn more:Landsat CollectionsLandsat Collections Fact sheetLandsat Data Access
Landsat Level-1 data can be rescaled to the top of atmosphere (TOA) reflectance and/or radiance using radiometric rescaling coefficients provided in the metadata file (MTL.txt) that is delivered with the Landsat Level-1 product. The MTL file also contains the thermal constants needed to convert thermal band data to TOA brightness temperature (BT). Formulas for these conversions are on the Using...
The C Function of Mask (CFMask) algorithm populates cloud, cloud confidence, cloud shadow, and snow/ice pixels in the processing of Landsat Collections Level-1 data products, with the results represented as bit-mapped values within the Landsat Collection 1 Level-1 Quality Assessment (QA) Band. CFMask derives from the Function of Mask (FMask), an algorithm written in MATLAB at Boston University and...
The historical Landsat Level-1 Scene ID is in the EarthExplorer metadata. After entering a search using the historical Scene ID, the Landsat Level-1 Collection 1 Product Identifier will be returned in the search results. The results can be exported from EarthExplorer in a variety of formats for metadata parsing.We also encourage use of the Bulk Metadata Service to download files that contain both...
The file sizes of Landsat Collection 1 Level-1 data products are listed in the table below.SensorCompressedfileUncompressedfileLandsat 8 OLI/TIRS919 MB1.61 GBLandsat 7 ETM+235 MB785 MBLandsat 4-5 TM150 MB500 MBLandsat 1-5 MSS20 MB75 MB
The table below shows the Landsat Collections Level-1 processing levels:Landsat Level-1 Processing LevelsProcessing LevelDescriptionTerrain Precision Correction (L1TP)Radiometrically calibrated and orthorectified using ground control points (GCPs) and digital elevation model (DEM) data to correct for relief displacement.The highest quality Level-1 products suitable for pixel-level time series...