TOPEX/Poseidon over Earth

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

Jason-1 launch images

TOPEX/Poseidon Ground Tracks

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 ...

Experts from NASA, ESA, EUMETSAT, and NOAA discuss the upcoming launch of Sentinel-6 Michael Freilich in a recorded live broadcast

Mike Davis in front of the faring

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...

Sentinel-6 Michael Freilich will join a long-standing family of Earth observing satellites from NASA and European partners.

TOPEX/Poseidon launch

OSTM/Jason-2 Radiometer Antenna

Jason-1 atop the Delta II Photo: Tom Shain

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

Ocean Dynamic Topography

Wind Speed

OSTM/Jason-2 Line Drawing

Jason-1 on top of the DPAF

TOPEX/Poseidon Poster (no text)

Variability of Ocean Dynamic Topography

This is an artist's concept of the Sentinel-6 Michael Freilich spacecraft.

The Antonov cargo aircraft carrying the Sentinel-6 Michael Freilich satellite touches down on the runway at Vandenberg Air Force Base in California on Sept. 24, 2020.

Radiometer Install - Jan. 2007

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

These photos were taken during the Dual Payload Attach Fitting (DPAF) mating operation with Jason-1. (11/13/01) Photos: Scott Michel

TOPEX/Poseidon Collecting Data

This artist's concept show Jason-3 over France.