Discoverer I was the first of a series of satellites part of the CORONA reconnaissance program. This satellite didn't take a camera or film system as it was intended as a test. There were issues communicating with the satellite during flight with only intermittent signals being read.
Polar OrbitVanguard II is an Earth orbiting satellite and the first weather satellite. It was designed to measure cloud-cover distribution over the daylight portion of its orbit for a period of 19 days and to provide information on the density of the atmosphere.
Medium Earth Orbit