Calibration and Validation is an important aspect of any remote sensing system. The calibration of the Landsat sensors is supported by data from preflight, postlaunch-onboard, and ground reference. Calibration files are provided for all sensors, along with the notices that describe any changes that may have been made. Bias parameter files are also available for Landsat 8 satellite data products. Definitive Ephemeris is useful in the geometric correction of Landsat data.
Calibration Parameter Files (CPF) provide radiometric and geometric coefficients needed for processing of raw, uncorrected Landsat image data. Over 15,000 coefficients are issued to span distinct timeframes and are updated with improved calibration coefficients.
Landsat 8 (L8) Operational Land Imager (OLI) and Thermal Infrared Sensor (TIRS) Calibration Notices
Landsat 7 (L7) Enhanced Thematic Mapper Plus (ETM+)
Landsat 4-5 Thematic Mapper (TM)
Landsat 1-5 Multi-Spectral Scanner (MSS)
Bias Parameter Files (BPF) supply radiometric correction parameters during Level 1 processing of Landsat 8’s Operational Land Imager (OLI) and calibration data products.
Bias Parameter Files (BPF) - Landsat 8 only
Landsat 8 (L8) OLI/TIRS BPF
Definitive Ephemeris is used for geometrically correcting Landsat data. An ephemeris is a set of data that provides the assigned places of a celestial body (including a manmade satellite) for regular intervals. Download Definitive Ephemeris for Landsat 7 and Landsat 5
Landsat data are systematic, geometric, radiometric, and terrain corrected to provide the highest quality data to the user communities. Occasionally, anomalies occur and artifacts are discovered that require research and monitoring. The Landsat Calibration and Validation (Cal/Val) team investigates and tracks anomalous data. Details about a number of anomalies that have been discovered and investigated can be found on the Landsat Known Issues page.