Thursday, July 28, 2022

The PO.DAAC is pleased to announce the release of reprocessed L1A, L1B and L2 altimetry data from the Sentinel-6 Michael Freilich/Jason CS radar altimeter mission. This mission aims to provide high-precision measurements of global sea-level that build upon the extensive record of observation from the previous Jason series altimetry missions.

Datasets in this release were processed with the latest Sentinel-6 processing baseline (F06), which has been in use operationally for Non-Time Critical (NTC) datasets generated since April 28, 2022. More information regarding Sentinel-6 data quality and reprocessing can be found here.

These new datasets are considered Version 2. Reprocessed data included in today's release cover the time frame from the start of the mission through April 28. Reprocessed data generated since April 28 are being migrated from Version F datasets into the new Version 2 datasets between now and August 1. Version F datasets will be retired on August 2 at 00:00 UTC after all reprocessed data have been migrated into the corresponding Version 2 datasets, and NTC data will be released through the Version 2 datasets operationally from that point onward. Users obtaining NTC data from PO.DAAC should switch to the datasets listed below. 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 V2
L2 P4 Altimeter High Resolution (HR) NTC Ocean Surface Topography V2
L2 P4 Altimeter Low Resolution (LR) NTC Reduced Ocean Surface Topography 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. 2021. <Dataset Title>. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https ://<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.