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


2.9.4 Common Auxiliary data sets

Common auxiliary files are files provided by the ENVISAT ground segment for use by all ENVISAT instruments (link to generic section on common aux files) . The common ENVISAT auxiliary files used by AATSR are listed below. Maintenance of these files is the responsibility of the ENVISAT Programme.

Digital Elevation Model File (AUX_DEM_AX)

Contains a world Digital Elevation Model (DEM). Used by AATSR to calculate the topographic correction to pixel latitude and longitude over land in the L1B and L2 1 km gridded products (see section ). Elevation values are provided over a regular grid. The coverage of the grid is from 180 + 1/24 W to 180 - 1/24 E degrees in longitude and from -90 + 1/24 to 90 - 1/24 degrees in latitude. The resolution of the grid is 1/12 degrees in longitude and 1/12 degrees in latitude. One value is recorded at each grid point.  The file contains two data sets:
  • General GADS (containing information describing the file)
  • DEM GADS (containing the values of ocean depth or land elevation)
TerrainBase CD-ROM Release 1.1, NOAA NESDIS National Geophysical Data Centre (
Infrequent. Most likely to be triggered by availability of improved DEM.

Land Sea Mask (AUX_LSM_AX)

A file classifying points on the Earth's surface as land/sea or coastline. Information is provided in 6 data sets at different resolutions. Used to set the AATSR land/sea flag associated with each pixel (see section ).
  • 1 degree resolution surface GADS
  • 0.1 degree resolution surface GADS
  • 0.01 degree resolution surface GADS
  • 1 degree resolution coastline GADS
  • 0.1 degree resolution coastline GADS
  • 0.01 degree resolution coastline GADS
Rutherford Appleton Laboratory, Space Science and Technology Department, ATSR Project.

FOS Predicted Orbit State Vectors (AUX_FPO_AX) and FOS Restituted Orbit State Vectors (AUX_FRO_AX)

Input to the ENVISAT orbit propagator software (link to generic section on ENVISAT CFIs) used for geolocation. Includes orbit number and satellite X, Y and Z position and velocity relative to the Earth fixed reference frame. The Preliminary and Precise Orbit State Vectors supplied by the DORIS instrument (link to DORIS handbook) can also be used for this purpose.
ENVISAT Flight Operations Segment (FOS)
Once per day

UTC/SBT Time Conversion (AUX_TIM_AX)

Input to the ENVISAT UTC/SBT Time Conversion software (link to generic section on ENVISAT CFIs) used throughout the ground segment
Once per orbit