Overview of the LandSat System

A U.S. Geological Survey Factsheet about the Landsat Program:

The Landsat Program is a joint effort of the U.S. Geological Survey (USGS) and theNational Aeronautics and Space Administration (NASA) to gather Earth resource data using aseries of satellites. NASA was responsible for developing and launching the spacecrafts. TheUSGS is responsible for flight operations, maintenance, and management of all ground datareception, processing, archiving, product generation, and distribution. A primary objective ofthe Landsat Program is to ensure a collection of consistently calibrated Earth imagery.

http://erg.usgs.gov/isb/pubs/factsheets/fs02303.html