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Best Altimetry

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Rankings use category fit, feature coverage, pricing signals, public reception, and recency. Affiliate relationships do not affect scores.

0.0 - 10.0
Best 1 TOPEX/Poseidon

A joint NASA/CNES satellite launched in 1992 that measured global sea-surface topography with radar altimetry, transforming ocean circulation science.

2 Jason-1
Jason-1

A joint NASA/CNES ocean altimetry satellite launched in 2001 as the direct successor to TOPEX/Poseidon, continuing precise global sea-level measurements.

3 Jason-2
Jason-2

A joint NASA/CNES/EUMETSAT/NOAA satellite launched in 2008 that extended the continuous sea-surface height record initiated by TOPEX/Poseidon.

4 Jason-3
Jason-3

A joint NASA/CNES/EUMETSAT/NOAA satellite launched in 2016 that continues the multi-decadal global sea-surface height measurement record.

5 Sentinel-6 Michael Freilich

Sentinel-6 Michael Freilich is a Copernicus sea-level satellite launched in 2020 to extend the precision altimetry record begun in 1992.

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