ERTS-1, later Landsat 1, begins the civil land-imaging record
The first Earth Resources Technology Satellite launched into a sun-synchronous orbit carrying a multispectral scanner, beginning a continuous record of the Earth's land surface that has now run for more than half a century. The mission established the pattern of civil Earth observation as a public programme whose value was assumed to be societal rather than commercial, a framing that would be contested repeatedly over the following decades as attempts were made to sell the data.
Historical — it happened, and the record is settled.
Subjects
- Landsat · spaceflight programme · not located
- Earth observation · industry sector · not located
Evidence
Partly verified — Core facts are sourced; some optional detail is deliberately absent.
USGS Landsat programme records and archive access policy
Supports the Landsat launch chronology from 1972 and the 2008 decision to distribute the full archive at no charge, together with the subsequent increase in scene distribution. V55 verification basis: usgs.gov was not retrievable in this session; the distribution increase is given as orders of magnitude rather than a number.
United States Geological Survey · Partly verified
US Geological Survey, Landsat programme mission records and the 2008 open-archive data policy
Recorded on Landsat
- ERTS-1, later Landsat 1, begins the civil land-imaging record
- The United States opens the Landsat archive at no charge
- Sentinel-1A launches and Copernicus data becomes free and open
Related
Related because they share a subject in the Atlas — never because the text looks similar.