SRTM Shuttle Radar Topography Mission
Remote Sensing

SRTM Shuttle Radar Topography Mission

During an 11-day mission, Space Shuttle Radar Topography (SRTM) mission captured Earth’s elevation at 1 arc-second (30 meters) for over 80% of the Earth.

polar orbits
Remote Sensing

Polar Orbit vs Sun Synchronous Orbit

A polar orbit satellite travels pole-to-pole. For a sun-synchronous orbit, it passes over any given point on Earth’s surface at the same local solar time.