Jason-1: TRSR instrument

Jason-1 launch images

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 ...

Our planet is changing. Our ocean is rising. And it affects us all. That’s why a new international satellite will continue the decades-long watch over our global ocean and help us better understand...

TOPEX/Poseidon Altimeter

OSTM/Jason-2 Artist's Concept

Jason-3 on the Launch Pad

NASA and its U.S. and international partners have teamed up to launch a new Earth-observing satellite called Sentinel-6B that will measure sea surface height of most of the planet’s ocean. These ob...

TOPEX/Poseidon over Earth

TOPEX/Poseidon launch

Jason-3 3D Model

OSTM/Jason-2 GPSP

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

OSTM/Jason-2 Radiometer Antenna

Headed for Orbit!

Bringing Satellite Data Down to Earth

Mission team members perform acoustic tests of the Sentinel-6 Michael Freilich satellite in a chamber outfitted with giant speakers that blast the spacecraft with sound. This is to ensure that the ...

OSTM/Jason-2 GPSP

Jason-1 Line Drawing

Mike Davis in front of the faring

TOPEX/Poseidon Mission to Planet Earth

These photos were taken during the Payload Attach Fitting (PAF) mating operation with Jason-1. (11/14/01) Photos: Scott Michel

Jason-1 in full flight configuration

Applications of Spaceborne Altimetry

The ocean-observing Sentinel-6 Michael Freilich satellite launched from Vandenberg Air Force Base in California aboard a SpaceX Falcon 9 rocket on Nov. 21, 2020 at 12:17 p.m. EST