First sequential views of cloud movements over the Earth, showing a pattern of clouds over the world for an entire dayATS1, 11 December 1966Vintage gelatin silver print on fibre-based paper, 20.5 x 25.7 cm (8 x 10 in), with a NASA caption numbered 66-H-1635 on the versoFootnotes:NASA's Applications Technology Satellite-I (ATS-I) was launched on the 6 December 1966 and fitted with the ground-breaking Spin-Scan Cloud Camera (SSCC). ATS 1 allowed to demonstrate the value to weather forecasting of utilizing geostationary orbit (22,000 miles above the equator) for monitoring cloud motion from a satellite platform. The camera provided full disk visible images of the Earth and its cloud cover every twenty minutes. For the first time, scientists could observe weather systems as they developed and gathered meaningful, quantitative data that could be ed to improve weather forecasts