Our readers Michelle and Ed both gave me a heads-up on the USGS’ plans and timeline for making the entire Landsat archive of imagery (with less than 20% cloud cover) available for download at no charge. The Landsat program has been an amazing success story, and its archives are really an incredible resource for research and education.
Here’s the current timeline for when each type of data will be available for download through the Internet (thanks Michelle):
Landsat 7 – all new global acquisitions – July 2008
Landsat 7 – all data – September 2008
Landsat 5 – all TM data – December 2008
Landsat 4 – all TM data – January 2009
Landsat 1-5 – all MSS data – January 2009