Last Updated
02 December 2020
Published on
29 November 2018
SRAL/MWR Processing Baselines of Sentinel-3 - Baseline Collection 004
Baseline Collection 004 | PB 2.61 | PB 2.68 - Marine |
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IPF versions | SRAL L1 (SR-1): 06.17 MWR L1 (MW-1): 06.11 SRAL/MWR L2 (SM-2): 06.18 |
SRAL L1 (SR-1): 06.18/06.19/06.20* MWR L1 (MW-1): 06.11 SRAL/MWR L2 (SM-2): 06.50 *Bug fix, no impact on data products |
Product Notice | L1 PN L2 PN |
L1 PN L2 PN |
User Announcement | Major evolution of Sentinel-3 Altimetry products | New Sentinel-3 Altimetry Processing Baseline released soon |
PB Deployment date (NRT) | 21/01/2020 | 09/07/2020 |
Dataset (NTC) (sensing time & server) |
Operational NTC From: 27/12/2019 To: Current CODA EOP |
Operational NTC From: 13/06/2020 To: Current CODA EOP |
Manifest file | Pass number anomalies were corrected, the the Pass number of the products is correct and limited to 770. | Anomalies on the L1 manifest have been fixed:
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Calibration | The L1 AUTOCAL sequence was updated and the expected impact on L2 products is low (see below). | |
Retrackers | Update of fitting routine, to correct SWH issue (see below), small impact on retracked parameters. | |
SSHA | SSHA is now computed using the filtered ionospheric correction, both in SAR and PLRM. The SSHA PLRM is now computed using PLRM SSB (bug fix) |
Improved filtered ionospheric correction used in the SSHA in very small NRT products. |
MSS | Update of Mean Sea Surface (MSS) to DTU18 | |
Tide Models | Update of FES2014 Tide Model library to the latest version of the library | |
Wet tropo | Update of radiometer derived Wet Tropo mostly due to updated MWR Antenna Patterns, larger effect getting closer to the coast | |
Dry tropo | ||
Wind Speed/Backscatter coefficient | Improved Wind Model for very low/high wind speeds | A slight difference on the sigma 0 (below 0.1 dB) and wind speed (below 0.2 m/s) is expected, due to the updated L1 AUTOCAL. |
SWH | Correction of a software issue for 20-Hz SWH | |
Sea Ice | Improvement of the Sea-Ice concentration close to the coastline; no more spuriously low values very close to the cost. | |
New parameters | Filtered Ionospheric correction (iono_cor_alt_filtered_01_ku and iono_cor_alt_01_filtered_plrm_ku) | L1A new format: Considering that CAL1 and CAL2 do not change rapidly and are therefore do not need to be repeated for each measurement in the L1A products, the time dimension (time_l1a_echo_sar_ku) and the index (ltm_max_ind) of the following variables has been removed:
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Other fixes or changes in the PBs |
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Changes to Ground Segment or Spacecraft | 28/05/2019: The KREMS safe zone* for both S3A and S3B has been reduced from 300 km radius (around the KREMS radar facility) to 100 km radius. *zone of the globe where the radiometer (MWR) is disabled and, thus, there is no wet tropospheric correction available from the radiometer, causing the SSHA to be set to a default value. |
Since 18/06/2020 a new OLTC is used on board of S3B. The updates are mostly relevant for land users. |
For a complete list of changes, please consult the product notices listed above.
For the historical summary table, see Past processing baselines.
