The release is a pilot for the Landsat Data Continuity Mission (LDCM) which is hoping to reach global coverage by 2010. LDCM will have a continuous record of the Earth's surface since 2000.
"Landsat data has proved useful for a wide range of applications," said the US Geological Survey in a statement.
"From disaster monitoring after Hurricane Katrina and the Indonesian tsunami to global crop condition analysis, Landsat data is being used by scientists around the world.
"The web-based distribution system will offer the user community easier access to Landsat 7 data."
The satellite can record in normal and infrared mode, and takes 532 pictures a day storing them on 378Gb of solid state memory.
The LDCM has been storing Earth satellite maps since 1972 for use in identifying trends in agriculture, urban development and climate.
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