Monday, August 1, 2022

Reprocessed L1A, L1B and L2 altimetry data from the Sentinel-6 Michael Freilich/Jason CS radar altimeter mission were released through the PO.DAAC for the first time on July 28th, 2022. The new releases include Non-Time Critical (NTC) data reprocessed with the latest Sentinel-6 processing baseline (F06). The new datasets are considered Version 2; they replace the corresponding datasets initially released as Version F. Please see the previous release announcement from July 28th for additional information.

This follow-up announcement informs users that all reprocessed data have been ingested into the new Version 2 datasets, such that Version 2 now contains the full record of sea level observation by Sentinel-6 from the NTC data stream. All NTC data will be released through Version 2 datasets operationally starting from 00:00 UTC on August 2. The corresponding Version F datasets are hereby retired. Users are reminded that they should switch to the datasets listed below to obtain NTC data from PO.DAAC going forward. NRT and STC data will continue to be available through the original datasets released for Version F. 

The reprocessed datasets can be accessed through NASA Earthdata Search. They are also accessible via the DOI links listed below, which redirect to the corresponding dataset landing pages on the PO.DAAC Web Portal.
L1A P4 Altimeter High Resolution (HR) NTC Intermediate Outputs w/ Instrument Calibrations V2
L1B P4 Altimeter High Resolution (HR) NTC Geolocated Waveforms V2
L1B P4 Altimeter Low Resolution (LR) NTC Geolocated Waveforms V2
L2 P4 Altimeter High Resolution (HR) NTC Reduced Ocean Surface Topography (Unvalidated) V2
L2 P4 Altimeter High Resolution (HR) NTC Ocean Surface Topography (Unvalidated) V2
L2 P4 Altimeter Low Resolution (LR) NTC Reduced Ocean Surface Topography (Unvalidated) V2
L2 P4 Altimeter Low Resolution (LR) NTC Ocean Surface Topography (Unvalidated) V2
L2 Advanced Microwave Radiometer (AMR-C) NTC Geophysical Parameters (Unvalidated) V2

Reprocessed Sentinel-6 datasets are also available from EUMETSAT. Minor differences between datasets distributed by EUMETSAT and PO.DAAC are described on the Sentinel-6 mission page on the PO.DAAC Web Portal.



Please cite the datasets according to this template when used in future publications:
Ocean Surface Topography Science Team. 2022. <Dataset Title>. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at<DOI Suffix>


Resources for accessing Sentinel-6 MF data from PO.DAAC through the Earthdata Cloud archive in Amazon Web Services (AWS):

  • Scripted Access to PO.DAAC Data in the Cloud  

    • Video Tutorial - this video tutorial and accompanying data subscriber script provide a user guide on scripted access to PO.DAAC data in the Earthdata Cloud. Users are free to use it as a building block, and modify it for use with Sentinel-6 MF data. 
    • Data subscriber - example script on how to download data given a PO.DAAC collection short name.

  • Additional data tutorials and examples can be found on the PO.DAAC Github.

  • PO.DAAC Cloud Data Pages - new centralized location that is a key source for all information about cloud data access and resources, including Sentinel-6 MF. More resources are continuously being added.


Comments/Questions? Please contact or visit the PO.DAAC Sentinel-6MF Forum.