Copernicus Sentinel-1 NRT-3h and Fast24h products - Copernicus Sentinel-1 NRT-3h and Fast24h products
Copernicus Sentinel-1 NRT-3h and Fast24h products
24 March 2021
As of 23 February 2021, the processing of Copernicus Sentinel-1 L1 and L2 products, tagged as NRT-3h and Fast24h, have been aligned.
Before 23 February, a different processing was performed for the two products.
Each product tagged NRT-3h was processed independently for the whole data take, contrary to products tagged Fast24h which were processed with the complete data take (in particular the calibration and noise information), ensuring the radiometric and geometric continuity between adjacent slices.
This different processing flow resulted in a different radiometric quality between NRT3h and Fast24h products. For this reason, NRT-3h products were processed subsequently in Fast24h and made available to all users on the Open Data Access Hub.
In addition, NRT-3h products were generated using the orbit information embedded in the satellite telemetry while Fast24h products where generated using Precise Orbit Determination (POD) information (POD-RESORB).
After 23 February, the same processing is performed for Sentinel-1 L1/2 products tagged NRT-3h or Fast24h. The annotated timeliness depends on the geographical area covered by the product and it is not anymore an indication of a different product quality. Data is processed only once and made available to all users on the Open Data Access Hub.
Data tagged NRT-3h and Fast24h is processed equally, with the complete data take (in particular the calibration and noise information), ensuring the radiometric and geometric continuity between adjacent slices.
In addition, NRT-3h and Fast24h products are processed using Precise Orbit Determination (POD) information, using typically POD-PREORB information for products tagged NRT-3h and POD-RESORB information for products tagged Fast24h.
POD-PREORB orbits have an accuracy typically below 10 cms RMS similar to POD-RESORB.
- Temporary unavailability of Copernicus Sentinel-2 production on 6-7 April 2021
- Forthcoming availability of the Copernicus Sentinel-1A and -1B reprocessed precise orbital products
- New Copernicus Sentinel-3 SYNergy Aerosol Optical Depth AOD products released
- Temporary unavailability of Copernicus Sentinel-2 production - 31st March and 1st April
- Copernicus Sentinel-2 brings students together for an online Remote Sensing course
Share your stories
Calling on all interested users of Sentinel data, who would like to submit their results, turning their experiences into 'success stories'.
If you have a good story to tell, of how any of the Sentinel satellites are producing data that bring benefit to your work and/or to society, please contact the Sentinel Online Editor Malì Cecere at: firstname.lastname@example.org with your proposals.