Low Earth Orbit (LEO)

A commercial low-Earth-orbit constellation delivering rapid-revisit, high-cadence Earth imagery.

A low-Earth-orbit satellite-phone and data constellation serving voice, messaging, and IoT connectivity.

The second-generation Iridium constellation of 66 cross-linked low-Earth-orbit satellites providing pole-to-pole voice and data coverage.

A low-Earth-orbit broadband constellation providing global connectivity, focused on enterprise, government, and maritime users.

SpaceX's low-Earth-orbit broadband internet constellation, the largest ever built, delivering global high-speed connectivity.

The first satellite launched by the United States, in 1958, whose radiation detector discovered the Van Allen radiation belts. Built by JPL and launched by the U.S. Army — NASA did not yet exist.

A twin-satellite mission that mapped tiny variations in Earth's gravity field to track the movement of water, ice, and mass around the planet.

The follow-on mission to GRACE, continuing the record of Earth's changing gravity field and the redistribution of water and ice.

A radar-altimetry mission continuing the decades-long record of global sea-surface height for oceanography and climate monitoring.

A crowdfunded CubeSat that demonstrated controlled solar sailing in Earth orbit, raising its orbit using only the pressure of sunlight.

A NASA–CNES mission surveying the height of Earth's surface water — oceans, lakes, and rivers — with unprecedented resolution.

The first successful weather satellite, which returned the first television images of Earth's cloud cover in 1960 and founded operational meteorology from space.