ESA Earth Home Missions Data Products Resources Applications
EO Data Access
How to Apply
How to Access
AATSR Data Formats Products
SST record 50 km cell MDS
BT/TOA Sea record 17 km cell MDS
Vegetation fraction for Land Surface Temperature Retrieval GADS
Topographic Variance data for Land Surface Temperature Retrieval GADS
Land Surface Temperature retrieval coefficients GADS
General Parameters for Land Surface Temperature Retrieval GADS
Climatology Variance Data for Land Surface Temperature Retrieval GADS
Level 0 SPH
Level 0 MDSR
Auxilliary Data SPH with N = 1
1.6 micron nadir view MDS
Summary Quality ADS
Scan pixel x and y ADS
Grid pixel latitude and longtitude topographic corrections ADS
Across-track Band Mapping Look-up Table
Configuration Data GADS
Processor configuration GADS
LST record 50 km cell MDS
Distributed product MDS
Level 2 SPH
10-arcminute mds
Limits GADS
Validation Parameters GADS
BT/TOA Land record 17 km cell MDS
General Parameters GADS
Temperature to Radiance LUT GADS
Radiance to Brightness Temperature LUT GADS
Medium/High Level Test LUT GADS
Infrared Histogram Test LUT GADS
11 Micron Spatial Coherence Test LUT GADS
11/3.7 Micron Nadir/Forward Test LUT GADS
11/12 Micron Nadir/Forward Test LUT GADS
Characterisation GADS
Browse Day_Time Colour LUT GADS
Browse SPH
Grid pixel latitude and longtitude topographic correction ADS
Level 2 SPH
Auxilliary Products
ATS_VC1_AX: Visible Calibration data
ATS_SST_AX: SST Retrieval Coeficients data
ATS_PC1_AX: Level-1B Processing configuration data
ATS_INS_AX: AATSR Instrument data
ATS_GC1_AX: General Calibration data
ATS_CH1_AX: Level-1B Characterization data
ATS_BRW_AX: Browse Product LUT data
Level 0 Products
ATS_NL__0P: AATSR Level 0 product
Browse Products
ATS_AST_BP: AATSR browse image
Level 1 Products
ATS_TOA_1P: AATSR Gridded brightness temperature and reflectance
Level 2 Products
ATS_NR__2P: AATSR geophysical product (full resolution)
ATS_MET_2P: AATSR Spatially Averaged Sea Surface Temperature for Meteo Users
ATS_AR__2P: AATSR averaged geophysical product
Frequently Asked Questions
The AATSR Instrument
Instrument Characteristics and Performance
In-flight performance verification
Instrument Description
Internal Data Flow
Instrument Functionality
AATSR Products and Algorithms
Common Auxiliary data sets
Auxiliary Data Sets for Level 2 processing
Instrument Specific Topics
Level 2 Products
Level 1B Products and Algorithms
Level 1B Products
Instrument Pixel Geolocation
The Level 0 Product
Differences Between ATSR-2 and AATSR Source Packets
Definitions and Conventions
Organisation of Products
Relationship Between AATSR and ATSR Products
AATSR Product Organisation
Data Handling Cookbook
Characterisation and Calibration
Monitoring of AATSR VISCAL Parameters
Latency, Throughput and Data Volume
Data Processing Software
Data Processing Centres
The AATSR Products User Guide
Image Gallery
Breakup of the Ross Ice Shelf
Land cover in the Middle East
Typhoon Saomai
Mutsu Bay, Japan
Deforestation in Brazil
Spatially Averaged Global SST, September 1993
Further Reading
How to use AATSR data
Why Choose AATSR Data?
Why Choose AATSR Data?
Special Features of AATSR
Principles of Measurement
Scientific Background
The AATSR Handbook
SST record 17 km cell MDS
Surface Vegetation class for Land Surface Temperature Retrieval GADS
1.6 micron forward view MDS
12 micron nadir view MDS
12 micron forward view MDS
Summary Quality ADS
Surveillance Limits GADS
Master Unpacking Definition Table GADS
1.6 micron Non-Linearity Correction LUT GADS
General Parameters GADS
Thin Cirrus Test LUT GADS
Fog/low Stratus Test LUT GADS
1.6 Micron Histogram
Browse MDS
ATS_CL1_AX: Cloud LUT data
Pre-flight characteristics and expected performance
Payload description, position on the platform
Auxiliary products
Auxiliary Data Sets for Level 1B processing
Summary of auxiliary data sets
Calculate Solar Angles
Image Pixel Geolocation
Level 0 Products
Acquisition and On-Board Data Processing
Product Evolution History
Hints and Algorithms for Higher Level Processing
Data Volume
Software tools
Summary of Applications vs Products
Geophysical Coverage
Geophysical Measurements
Visible calibration coefficients GADS
Level 1B SPH
LST record 17 km cell MDS
Conversion Parameters GADS
12 Micron Gross Cloud Test LUT GADS
ATS_PC2_AX: Level-2 Processor Configuration data
Level 2 Products
Hints and Algorithms for Data Use
BT/TOA Sea record 50 km cell MDS
BT/TOA Land record 50 km cell MDS
Level 2 Algorithms
Signal Calibration
Site Map
Frequently asked questions
Terms of use
Contact us


2.9.2 Auxiliary Data Sets for Level 1B processing

All of the following AATSR-specific L1B auxiliary files will be maintained by the Announcement of Opportunity Instrument Provider (AOIP), with the exception of ATS_BRW_AX.  This file will be maintained by ESA.

Clicking on the links provided will take the reader to the Data Formats section of this handbook, which contains a description of each field within each data set.

AATSR L1B Processor Configuration File (ATS_PC1_AX) 6.5.6.

Used throughout the L1B processing, this file consists of a single data set containing constants and internal instrument and data processing parameters.
AATSR processing architecture and instrument characterisation data.
Optimised during L1B algorithm verification. Likely to remain unchanged from then on.

AATSR Instrument Characterisation File (ATS_INS_AX) 6.5.5.

Used to unpack and validate the AATSR measurement and auxiliary telemetry, this file contains 6 data sets:
  • General parameters for unpacking source packet auxiliary data.
  • Master Unpacking Definition Table (MUDT) for unpacking auxiliary data.
  • Parameters to convert unpacked auxiliary items.
  • Parameters to perform limit checks on the unpacked auxiliary items.
  • Surveillance limits for checks on converted auxiliary items.
  • Validation parameters for specialised checks of converted auxiliary items.
Instrument telemetry definition, instrument characterisation data and Instrument Operations Manual (IOM).
These instrument parameters will be scrutinised as part of the instrument Switch On and Data Acquisition Phase (SODAP) test programme. Once completed, they are expected to remain relatively stable throughout the mission. Any changes to surveillance limits will be identified as part of routine instrument performance monitoring by the Flight Operations Support team.

Visible Calibration File (ATS_VC1_AX) 6.5.9.

Contains a single data set of visible channel calibration parameters.
New calibration parameters are calculated and submitted to the PDS once per day based on the observed signal from the AATSR VISCAL unit from previous orbits.
Daily (see section 2.11. for further details).

General Calibration File (ATS_GC1_AX) 6.5.4.

Consists of 4 data sets containing parameters used in the calibration of the infrared channels:
  • General parameters for IR calibration
  • Temperature to radiance LUT
  • Radiance to Brightness Temperature LUT
  • 1.6 µm channel non-linearity correction LUT
Calculated from instrument characterisation data, including channel filter profiles and non-linearity measurements. This process is discussed further in section and section
Verified during AATSR Switch-On and Data Acquisition Phase (SODAP). Any future updates are expected to be infrequent.

L1B Characterisation File (ATS_CH1_AX) 6.5.2.

A single data set containing several categories of parameter: instrument alignment parameters related to the satellite geolocation model, AOCS and geodetic constants (e.g. parameters of the reference ellipsoid) and parameters relating to the pixel map and regridding. Used primarily for geolocation and regridding.
Instrument characterisation data, physical constants and internal processing parameters.
Instrument alignment parameters will require verification in-flight during the SODAP. Further tuning may be necessary during algorithm verification. Subsequent updates will be infrequent. All other data will be stable prior to launch.

Cloud Test LUTs (ATS_CL1_AX) 6.5.3.

9 data sets, containing coefficients and thresholds for the 9 tests used by the cloud-clearing algorithm. (Zavody et al, 2000 Ref. [1.19 ] ):
  • 1.6 µm histogram test LUT
  • 11 µm spatial coherence test LUT
  • 12 µm gross cloud test LUT
  • Thin cirrus test LUT
  • Medium/high level cloud test LUT
  • Fog/low stratus test LUT
  • 11/12 µm nadir/forward test LUT
  • 11/3.7 µm nadir/forward test LUT
  • Infra-red histogram test LUT
Some tables are based on Radiative Transfer (RT) modelling. Others are derived on a more empirical basis by inspection of images. Many have been passed directly from ATSR-2 to AATSR.

For the 2 view-difference tests, coefficients were fitted to BT data derived from RT modelling. The thresholds for these tests remain the same as for ATSR-2.

Thresholds for the 11/12 micron thin cirrus test and the medium/high level cloud test represent an envelope enclosing the data on a corresponding scatter diagram. New thresholds were derived for AATSR by applying a differential correction to those in the ATSR-2 table, the magnitude of which is derived from RT modelling.

All other tables are those used with ATSR-2. In most of these cases, the tables for ATSR-1 and ATSR-2 were identical, and no basis for a differential correction was identified.

Certain LUT parameters may be adjusted on an empirical basis with respect to real data during the commissioning phase, however there are no plans for a thorough review of the AATSR cloud tests. The RT modelling for cloud clearing is similar to that required for the derivation of SST retrieval coefficients. Therefore, any update to those files requiring RT modelling is likely to coincide with a new RT modelling exercise for the SST coefficients.

Browse LUT (ATS_BRW_AX) 6.5.1.

Colour LUT used during production of the daytime part of the AATSR Browse product to convert the 0.67, 0.87 and 11 µm channel values to values of red, green and blue.
IONIA AVHRR Browser scheme (Melinotte et al,1995 Ref. [1.13 ] ). This LUT has been developed to enhance specific features of the data.
Infrequent. Most likely during the early months of the mission, to optimise the performance of the Browse product. Will remain stable from that point on.