t - 10 minutes

This illustration shows the Sentinel-6 Michael Freilich spacecraft in orbit above Earth with its deployable solar panels extended.

OSTM/Jason-2 Radiometer Antenna

TOPEX/Poseidon Altimeter

Sea Level

SpaceX Falcon 9 rocket with the Sentinel-6 Michael Freilich satellite is lifted to vertical at Space Launch Complex 4

Jason-3 Animation

TOPEX/Poseidon Poster (no text)

Water Vapor

Jason-1 Line Drawing

Jason-3 Ready for Launch

OSTM/Jason-2 Spacecraft

TOPEX/Poseidon GPS

TOPEX/Poseidon DORIS

Launch preparations are progressing! (11/21/01) Photos: Stacy Mitchell of John Hopkins APL/TIMED project

The joint U.S.-European Sentinel-6 Michael Freilich is the next in a line of Earth-observing satellites that will collect the most accurate data yet on sea level and how it changes over time. With ...

Ocean Dynamic Topography

Jason-1: LRA instrument

This artist's concept shows Jason-3 over the California coast.

TOPEX/Poseidon Artist's Concept

Jason-1 Poster

Jason-1 launch images

Whale Census and Habitat

Jason-1: JMR instrument

TOPEX/Poseidon over Earth

For NASA scientist Severine Fournier, studying our planet knows no borders.