Nov 5, 2026
NASA’s Physical Oceanography Distributed Active Archive Center (PO.DAAC) announced the first public release of the NTC (non time critical) altimetry data products from the Sentinel-6B satellite. The NRT (near real time) and STC (short time critical) products were released earlier this year. The Sentinel-6B radar altimeter mission aims to provide high-precision measurements of global sea-level that build upon the extensive record of observation from the previous Jason series of altimetry missions. The altimetry LR/HR (low rate / high rate) NTC products have been successfully validated by Calibration and Validation (Cal/Val) activities during the second half of the Sentinel-6B Commissioning Phase.
This release covers L1A, L1B, and L2 altimeter (ALT) LR/HR and microwave radiometer (MWR) data processed in NTC latency from cycle #31 onward. L2 altimetry datasets are provided in “standard” and “reduced” forms. Standard products contain both 1Hz and 20Hz data, while reduced products contain only 1Hz data. Sea Surface Height Anomaly (SSHA), Significant Wave Height (SWH), and Wind Speed are included in all L2 altimetry datasets. Standard datasets also include both 1 Hz and 20 Hz measurements from the P4 radar altimeter, orbit altitude, environmental range corrections, instrument corrections, and geophysical models. Please see the Product Notice that describes this release.
The datasets are described and discoverable via the NASA Earthdata Portal at the below dataset landing pages:
The datasets are also discoverable and downloadable with subsetting options via Earthdata Search and the PO.DAAC Data Subscriber Tool.
If you have questions, please contact podaac@podaac.jpl.nasa.gov or visit PO.DAAC on Earthdata Forum.
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User Services Office
NASA JPL Physical Oceanography DAAC
E-mail: podaac@podaac.jpl.nasa.gov
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