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ATSR-1 Ungridded Brightness Temperature (UBT) Data

Update Frequency: Not Planned
Latest Data Update: 2019-05-09
Status: Completed
Online Status: ONLINE
Publication State: Published
Publication Date: 2003-10-03
Download Stats: last 12 months
Dataset Size: 2.27M Files | 7TB

This dataset has been superseded. See Latest Version here

Data from the Along Track Scanning Radiometer (ATSR-1) instrument on the ERS-1 platform operational between 1991 and 1996. The ATSR is an imaging radiometer providing images of the Earth from space. The ERS (Earth Resources Satellite) program was funded by and operated by ESA and was the first main ESA EO data campaign. ATSR-1 was placed on the ERS1 platform and ATSR-2 was on the ERS-2 platform. The ATSR-1 and 2 instruments were followed by the Advanced Along Track Scanning Radiometer (AATSR) on the ENVISAT platform in 2002.

The ATSR-1 instrument has been designed for exceptional sensitivity and stability of calibration, which are achieved through the incorporation of several innovative features in the instrument design. This design has, among other things, enabled the accurate measurement of sea surface temperature to an accuracy of +/- 0.3K. The design of the ATSR instrument incorporates a dual view made possible by the rotating scan mirror. There is a nadir view and then a subsequent along track view. These provide 2 images per scan and allow improved estimate of atmospheric attenuation. This coupled with the inclusion of consistent calibration using on-board black bodies allows for the collection of extremely radiometrically accurate data.

The data are Level1 Ungridded Brightness Temperatures (UBT). The data are in SADIST-2 format and CEDA is the primary archive for this data. The UBT product provides scenes for both nadir and forward views with a swath width of 512km and a ground pixel distance of 1km.

This dataset is superseded by the AATSR Multimission ATSR-1 data set that involved reprocessing this data with improved calibration and cloud masking and is available in a number of reprocessings so consistent with ENVISAT format data.

Citable as:  European Space Agency (2003): ATSR-1 Ungridded Brightness Temperature (UBT) Data. NERC Earth Observation Data Centre, date of citation.
Abbreviation: Not defined
Keywords: Brightness Temperature, Radiometric Calibration, Dual View, Nadir view, Forward view, Reprocessed


Previous Info:

2022-12-12 This data has been superseded by aatsr_multimission data 2022-12-12 This data has been superseded by aatsr_multimission data

Previously used record identifiers:
No related previous identifiers.
Access rules:
Restricted data: please submit an application using the REQUEST ACCESS link for access.
Use of these data is covered by the following licence: When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.
Data lineage:

Data was producted by the ESA ERS Ground Segment and UBT and GBT (Gridded Brightness Temperature) products delivered to STFC RAL by tape. Data was initially made available to the NEODC (NERC Earth Observation Data Centre) to users authorised by the ESA/NERC Data Quality working group. CEDA maintains this data as the primary archive of ATSR UBT data.

Data Quality:
UBT Data from the ATSR series instruments are L1 radiometrically calibrated using integrated sterling cycle black bodies incorporated within each swath scan. Data are themselves 512km x 512km alongtrack scanned data incorporating 2 views: Nadir and Forward. These two views are made available as separate files but share filename attributes but delineated by "NAD" or "FRWD" within the filename.
File Format:

Process overview

This dataset was generated by instruments deployed on platforms as listed below.

Instrument/Platform pairings

Along Track Scanning Radiometer (ATSR-1) Deployed on: ERS-1
Output Description


No variables found.

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