The USGS is offering standard data products from the entire Landsat archive to all users at no charge. While most Landsat scenes are processed with the Standard Terrain Correction (Level 1T), some scenes do not have the ground-control or elevation data necessary to perform these corrections. In these cases, the best level of correction is applied. (See the box below for details on the levels of correction.)
Additionally, most archived Landsat 1-5 MSS scenes, as well as a select number of Landsat 4-5 TM scenes, are processed with only Systematic Correction (Level 1G) due to processing constraints. Improvements to production capabilities are being investigated and, when employed, will allow more scenes to be processed at a higher correction level with a shorter processing time.
The processing level of a downloaded scene is located in the metadata (MTL.txt) file or processing history (WO.txt) file; these are delivered with the data band files and other ancillary data. For more information, please refer to this FAQ.
Landsat data product details:
Landsat 8 Operational Land Imager (OLI) and Thermal Infrared Sensor (TIRS) – sensors carried onboard Landsat 8 since February 2013 with a 16-day repeat cycle. (coming soon)
Landsat 7 Enhanced Thematic Mapper Plus (ETM+) - a sensor carried onboard the Landsat 7 satellite since July 1999 with a 16-day repeat cycle.
Landsat 4-5 Thematic Mapper (TM) - a sensor carried onboard both Landsat 4 and Landsat 5 from July 1982 to December 2012 with a 16-day repeat cycle.
Landsat 1-5 Multispectral Scanner (MSS) - a sensor carried onboard Landsats 1-3 from July 1972 to March 1983 with an 18-day repeat cycle, and onboard Landsats 4 and 5 from July 1982 to October 1992 with a 16-day repeat cycle.
Remotely Sensed Data Collections: Offerings from EROS - .pdf (1.24 MB) - this fact sheet highlights eight remotely sensed data collections that are currently available from EROS.