NERC Data Catalogue Service
Sentinel 3A Synthetic Aperture Radar Altimeter (SRAL) Level 1B-S data
This dataset contains level 1b (L1B-S) altimetry data from the Synthetic Aperture Radar Altimeter (SRAL) aboard the European Space Agency (ESA) Sentinel 3A Satellite. Sentinel 3A was launched on the 16th of February 2016. These data are fully SAR-processed and calibrated High-Resolution (HR) complex echoes arranged in stacks after slant range correction and prior to echo multi-look (multi-look processing reduces noise by averaging of adjacent pixels, and thereby reduces the standard deviation of the noise level).
The L1B-S HR product contains information from Doppler beams data. Hence, it has only been defined for the Synthetic Aperture Radar (SAR) processing chain. The Doppler beams associated with a given surface location (also called stack data) are formed through the selection of all the beams that illuminate a given surface location, and that contribute to each L1B HR waveform. Beams are the result of applying Doppler processing to the waveform bursts, which allows division of the conventional altimeter footprint into a certain number of stripes, thus creating a Delay Doppler Map (DDM). With this, contributions coming from different stripes can be identified and collected separately. When all the contributions from different bursts are collected, a stack is formed. The stack waveforms are provided in In-phase (I) and Quadrature-phase (I/Q) samples (complex waveforms) in the frequency domain. Apart from the Doppler processing, the beams of a stack have also been fully calibrated and range aligned. The L1B-S also includes characterisation parameters about the stack itself. The time tag is given at each surface location (defined throughout the L1 processing chain).
Data are provided by ESA and are made available via CEDA to any registered user.
Default
Identification info
- Metadata Language
- English (en)
- Dataset Reference Date ()
- 2021-07-01T16:06:40
- Dataset Reference Date ()
- 2021-07-01T16:06:40
- Identifier
- NERC EDS Centre for Environmental Data Analysis / 41526384c3dd463eb0fc0117b87d08f6
- Maintenance and update frequency
- continual
- Update scope
- dataset
- Keywords
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- Sentinel
- Synthetic Aperture Radar Altimeter
- SRAL
- SAR
- Sentinel3
- GEMET - INSPIRE themes, version 1.0 ()
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- orthoimagery
- Limitations on Public Access
- otherRestrictions
- Other constraints
- Access to these data is available to any registered CEDA user. Please Login or Register for an account to gain access.
- Use constraints
- otherRestrictions
- Spatial representation type
- grid
- Topic category
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- Imagery base maps earth cover
))
- Begin date
- 2018-02-01T00:00:00
- Code
- WGS 84
Distribution Information
- Data format
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Data are provided by ESA in zipped SAFE format.
()
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Data are provided by ESA in zipped SAFE format.
()
- Resource Locator
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CEDA Data Catalogue Page
Detail and access information for the resource
- Resource Locator
-
DOWNLOAD
Download Data
- Resource Locator
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Sentinel 3 Toolbox (S3TBX)
No further details.
- Resource Locator
-
Sentinel 3 Altimetry User Guide
No further details.
- Resource Locator
-
CEDA Data Catalogue Page
Detail and access information for the resource
- Resource Locator
-
DOWNLOAD
Download Data
- Resource Locator
-
Sentinel 3 Toolbox (S3TBX)
No further details.
- Resource Locator
-
Sentinel 3 Altimetry User Guide
No further details.
- Quality Scope
- dataset
Report
- Dataset Reference Date ()
- 2010-12-08
- Statement
- Data collected and prepared by European Space Agency (ESA). Downloaded from the Sentinel hubs for use by the CEDA community.
Metadata
- File identifier
- 41526384c3dd463eb0fc0117b87d08f6 XML
- Metadata Language
- English (en)
- Character set
- 8-bit variable size UCS Transfer Format, based on ISO/IEC 10646
- Parent identifier
- 0bcc2457250548abb51a90f96772c374 0bcc2457250548abb51a90f96772c374
- Resource type
- dataset
- Metadata Date
- 2023-03-24T01:33:37
- Metadata standard name
- UK GEMINI
- Metadata standard version
- 2.3
