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    24-Jul-2014
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Index
Credits
AATSR Data Formats Products
Records
SST record 50 km cell MDS
BT/TOA Sea record 17 km cell MDS
ATS_TOA_1P_MDSR_conf
ATS_TOA_1P_MDSR_cl
ATS_TOA_1P_ADSR_pix
ATS_SST_AX_GADSR
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
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
Algorithms
Instrument Pixel Geolocation
Availability
The Level 0 Product
Differences Between ATSR-2 and AATSR Source Packets
Definitions and Conventions
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
Throughput
Introduction
Heritage
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
Glossary
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
ATS_TOA_1P_ADSR_sa
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
Services
Site Map
Frequently asked questions
Glossary
Credits
Terms of use
Contact us
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Index

1 The AATSR Products User Guide
1.1 Why Choose AATSR Data?
1.1.1 Geophysical Measurements
1.1.1.1 Primary Geophysical Measurement
1.1.1.2 Additional Capabilities
1.1.1.3 Cloud and Atmospheric Measurements
1.1.1.4 Cryosphere
1.1.2 Scientific Background
1.1.2.1 SST
1.1.2.2 Remote Sensing Over Land
1.1.2.3 Cryosphere, Cloud and Atmospheric Measurements
1.1.3 Principles of Measurement
1.1.3.1 The AATSR Instrument
1.1.3.2 AATSR Flight Operations
1.1.4 Geophysical Coverage
1.1.4.1 Instrument Swath
1.1.4.2 Orbit and Repeat Cycle
1.1.5 Special Features of AATSR
1.1.5.1 Onboard Calibration
1.1.5.2 Dual View
1.1.5.3 Coolers
1.1.5.4 Full 12 bit digitisation
1.1.6 Summary of Applications vs Products
1.2 How to use AATSR data
1.2.1 Software tools
1.2.1.1 General Tools
1.2.1.2 EnviView
1.2.1.3 Instrument specific software tools
1.3 Further Reading
1.4 Image Gallery
1.4.1 Spatially Averaged Global SST, September 1993
1.4.2 Deforestation in Brazil
1.4.3 Mutsu Bay, Japan
1.4.4 Typhoon Saomai
1.4.5 Land cover in the Middle East
1.4.6 Breakup of the Ross Ice Shelf
2 AATSR Products and Algorithms
2.1 Introduction
2.1.1 Data Processing Centres
2.1.2 Data Processing Software
2.1.3 Heritage
2.2 Organisation of Products
2.2.1 ENVISAT Product Organisation
2.2.2 AATSR Product Organisation
2.2.3 Relationship Between AATSR and ATSR Products
2.3 Definitions and Conventions
2.3.1 Definitions
2.3.2 Conventions
2.4 Product Evolution History
2.5 Level 0 Products
2.5.1 AATSR Instrument Source Packet
2.5.2 Differences Between ATSR-2 and AATSR Source Packets
2.5.3 Acquisition and On-Board Data Processing
2.5.4 The Level 0 Product
2.5.4.1 ATS_NL_OP
2.5.5 Availability
2.6 Level 1B Products and Algorithms
2.6.1 Algorithms
2.6.1.1 ATS_TOA_1P
2.6.1.1.1 Source packet Processing
2.6.1.1.2 Infra-Red Channel calibration
2.6.1.1.2.1 Infra-Red Calibration
2.6.1.1.2.1.1 Physical Justification
2.6.1.1.2.1.1.1 Overview
2.6.1.1.2.1.1.2 Detector Response to source radiation
2.6.1.1.2.1.1.3 Effect of signal channel processing circuits
2.6.1.1.2.1.1.4 Determination of the calibration coefficients
2.6.1.1.2.1.1.5 Signal Channel Calibration
2.6.1.1.2.1.1.6 Detector non-linearity
2.6.1.1.2.1.1.7 Derivation of the look-up tables
2.6.1.1.2.1.2 Algorithm Description
2.6.1.1.2.1.3 Accuracies
2.6.1.1.3 Visible Channel Calibration
2.6.1.1.4 Satellite Time Calibration
2.6.1.1.5 Geolocation
2.6.1.1.5.1 Instrument Pixel Geolocation
2.6.1.1.5.1.1 Physical Justification
2.6.1.1.5.1.1.1 Co-ordinates of the scan pixel
2.6.1.1.5.1.1.2 Line of sight in the satellite reference frame
2.6.1.1.5.1.1.2.1 AATSR Scan geometry
2.6.1.1.5.1.1.2.2 Instrument misalignment
2.6.1.1.5.1.1.3 Attitude Transformations
2.6.1.1.5.1.2 Algorithm Description
2.6.1.1.5.1.2.1 Summary
2.6.1.1.5.1.2.2 Algorithm Definition
2.6.1.1.5.1.2.3 Interpolation
2.6.1.1.5.1.3 Accuracies
2.6.1.1.5.2 Image Pixel Geolocation
2.6.1.1.5.2.1 Physical Justification
2.6.1.1.5.2.1.1 The Image Co-ordinates used for AATSR
2.6.1.1.5.2.1.2 Geometrical Relationships on the Ellipsoid
2.6.1.1.5.2.1.2.1 The Reference Ellipsoid
2.6.1.1.5.2.1.2.2 Length and azimuth on the ellipsoid
2.6.1.1.5.2.1.2.3 Arc length on the ellipsoid
2.6.1.1.5.2.1.2.4 Solution of Ellipsoidal triangles
2.6.1.1.5.2.1.3 Calculation of Image co-ordinates of Scan Pixel
2.6.1.1.5.2.1.4 Image Pixel geolocation
2.6.1.1.5.2.2 Algorithm Description
2.6.1.1.5.2.2.1 Summary
2.6.1.1.5.2.2.1.1 Generate Geolocation Arrays
2.6.1.1.5.2.2.1.2 Calculate Pixel x and y co-ordinates
2.6.1.1.5.2.2.1.3 Image Pixel Positions
2.6.1.1.5.2.2.2 Image Pixel Geolocation
2.6.1.1.5.2.2.2.1 Along-track look-up tables
2.6.1.1.5.2.2.2.2 Reference Grid of Image Pixel Co-ordinates
2.6.1.1.5.2.2.3 Image co-ordinates of the scan pixel
2.6.1.1.5.2.2.3.1 Calculation of the sides of the triangle
2.6.1.1.5.2.2.3.2 The angle at Q
2.6.1.1.5.2.2.3.3 The x and y co-ordinates
2.6.1.1.5.2.2.4 Accuracies
2.6.1.1.5.3 Calculate Solar Angles
2.6.1.1.5.4 Calculate Topographic Corrections
2.6.1.1.5.4.1 Theoretical Basis
2.6.1.1.5.4.2 Algorithm Description
2.6.1.1.6 Signal Calibration
2.6.1.1.7 Regrid Pixels
2.6.1.1.8 Cosmetic Fill
2.6.1.1.9 Determine Land-Sea Flag
2.6.1.1.10 Cloud Clearing
2.6.1.1.10.1 Gross cloud test
2.6.1.1.10.2 Thin cirrus test
2.6.1.1.10.3 Medium/high level cloud test
2.6.1.1.10.4 Fog/low stratus test
2.6.1.1.10.5 Spatial coherence test (11 um)
2.6.1.1.10.6 Histogram test (1.6 um)
2.6.1.1.10.7 11/12 um and 11/3.7 um nadir/forward tests
2.6.1.1.10.7.1 11/12 um nadir/forward test
2.6.1.1.10.7.2 11/3.7 um nadir/forward test
2.6.1.1.10.8 Infrared histogram test
2.6.1.2 ATS_AST_BP
2.6.1.2.1 Physical Justification
2.6.1.2.1.1 Day-time browse product
2.6.1.2.1.2 Night-time browse product
2.6.1.2.1.3 Transition processing
2.6.1.2.2 Algorithm Description
2.6.1.2.2.1 Image sub-sampling
2.6.1.2.2.2 Day time processing
2.6.1.2.2.2.1 Generation of RGB Values
2.6.1.2.2.3 Night-time processing
2.6.1.2.2.4 Transition processing
2.6.1.2.2.4.1 The RGB to HSV transformation
2.6.1.2.2.4.2 The HSV to RGB transformation
2.6.1.2.2.4.3 Pixel processing in the transition region
2.6.2 Level 1B Products
2.6.2.1 Structure of AATSR gridded products
2.6.2.1.1 ATS_TOA_1P
2.6.2.1.2 ATS_AST_BP
2.6.2.2 Structure of AATSR Ungridded Products
2.6.2.2.1 UCOUNTS
2.6.2.2.2 UBTR
2.7 Level 2 Products
2.7.1 Level 2 Algorithms
2.7.1.1 Prepare Inputs
2.7.1.1.1 Input Annotation Data Sets
2.7.1.1.2 Assemble Regridded Brightness Temperature Arrays
2.7.1.1.3 Interpolate Solar Angles
2.7.1.1.4 Interpolate Image Pixel position
2.7.1.2 Derive Gridded Product
2.7.1.2.1 SST Retrieval
2.7.1.2.1.1 Physical Justification
2.7.1.2.1.1.1 Introduction
2.7.1.2.1.1.2 Channel selection
2.7.1.2.1.1.3 Latitude zones
2.7.1.2.1.1.4 Across-Track Bands
2.7.1.2.1.1.5 Smoothing
2.7.1.2.1.2 Algorithm Description
2.7.1.2.1.2.1 Full resolution (gridded) Surface Temperature Image Product
2.7.1.2.2 Land Surface Temperature Retrieval
2.7.1.2.2.1 Physical Justification
2.7.1.2.2.1.1 Retrieval Coefficients
2.7.1.2.2.1.2 Interpolation of precipitable water
2.7.1.2.2.2 Algorithm Description
2.7.1.3 Derive Averaged Product (Half-Degree cells)
2.7.1.3.1 Spatial Averaging
2.7.1.3.2 Averaged SST Retrieval
2.7.1.3.3 Averaged NDVI and LST Retrieval
2.7.1.3.4 Spatially Averaged Cloud Parameters
2.7.1.4 Derive Averaged Product (50 km cells)
2.7.2 Level 2 Products
2.7.2.1 ATS_NR_2P
2.7.2.2 ATS_AR_2P
2.7.2.3 ATS_MET_2P
2.8 Instrument Specific Topics
2.9 Auxiliary products
2.9.1 Summary of auxiliary data sets
2.9.1.1 Definition
2.9.1.2 Structure
2.9.1.3 Files Used in AATSR Processing
2.9.1.4 Information and Availability
2.9.2 Auxiliary Data Sets for Level 1B processing
2.9.3 Auxiliary Data Sets for Level 2 processing
2.9.4 Common Auxiliary data sets
2.10 Latency, Throughput and Data Volume
2.10.1 Latency
2.10.2 Throughput
2.10.3 Data Volume
2.11 Characterisation and Calibration
2.11.1 Introduction
2.11.2 Monitoring of AATSR VISCAL Parameters
2.12 Data Handling Cookbook
2.12.1 Hints and Algorithms for Data Use
2.12.1.1 Granules
2.12.1.2 Tie Points
2.12.1.3 Relationship Between Measurement Data and Annotation Data in the Gridded Products
2.12.1.3.1 ATS_TOA_1P
2.12.1.3.2 ATS_NR_2P
2.12.1.3.3 ATS_AR_2P
2.12.1.4 The Switchable Product Concept
2.12.1.5 Placeholders
2.12.1.5.1 GST Product (ATS_NR_2P)
2.12.1.5.2 AST Product (ATS_AR_2P)
2.12.1.6 Visualising Spatially Averaged Cells
2.12.1.6.1 Spatially Averaged Cell Latitude and Longitude
2.12.1.6.2 Confidence Words and Exception Values
2.12.1.6.3 Topographic Correction
2.12.1.7 Implications of true IFOV on LST measurements (based on Notes from E. Noyes, University of Leicester, August 2005)
2.12.2 Hints and Algorithms for Higher Level Processing
3 The AATSR Instrument
3.1 Instrument Description
3.1.1 Payload description, position on the platform
3.1.2 Instrument Functionality
3.1.2.1 Infrared and Visible Radiometer Assembly
3.1.2.2 Instrument Electronics Unit/Black Body Electronics Unit
3.1.2.2.1 Instrument Electronics Unit
3.1.2.2.2 Black Body Electronics Unit
3.1.2.3 Digital Electronics Unit/Power Conditioning and Switching Unit
3.1.2.4 Cooler Control Unit
3.1.2.5 Instrument Harness
3.1.3 Internal Data Flow
3.2 Instrument Characteristics and Performance
3.2.1 Pre-flight characteristics and expected performance
3.2.1.1 Spectral
3.2.1.1.1 Specifications
3.2.1.1.2 Measurements
3.2.1.2 Spatial
3.2.1.2.1 Description and Specifications
3.2.1.2.2 Measurements
3.2.1.3 Pointing
3.2.1.3.1 Alignment and platform pointing
3.2.1.3.2 Pointing performance of the scan mechanism
3.2.1.4 Radiometric
3.2.1.4.1 Specifications
3.2.1.4.2 Measurements
3.2.1.4.2.1 Polarisation
3.2.1.4.2.2 Instrument-level visible channel results
3.2.1.4.2.3 Instrument-level infra-red results
3.2.1.5 Stability
3.2.2 In-flight performance verification
3.2.2.1 Commissioning
3.2.2.2 Routine Verification
3.2.2.2.1 Outgassing
4 Frequently Asked Questions
5 Glossary
5.1 Acronyms and Abbreviations
5.2 Glossary
6 AATSR Data Formats Products
6.1 Level 2 Products
6.1.1 ATS_AR__2P: AATSR averaged geophysical product
6.1.2 ATS_MET_2P: AATSR Spatially Averaged Sea Surface Temperature for Meteo Users
6.1.3 ATS_NR__2P: AATSR geophysical product (full resolution)
6.2 Level 1 Products
6.2.1 ATS_TOA_1P: AATSR Gridded brightness temperature and reflectance
6.3 Browse Products
6.3.1 ATS_AST_BP: AATSR browse image
6.4 Level 0 Products
6.4.1 ATS_NL__0P: AATSR Level 0 product
6.5 Auxilliary Products
6.5.1 ATS_BRW_AX: Browse Product LUT data
6.5.2 ATS_CH1_AX: Level-1B Characterization data
6.5.3 ATS_CL1_AX: Cloud LUT data
6.5.4 ATS_GC1_AX: General Calibration data
6.5.5 ATS_INS_AX: AATSR Instrument data
6.5.6 ATS_PC1_AX: Level-1B Processing configuration data
6.5.7 ATS_PC2_AX: Level-2 Processor Configuration data
6.5.8 ATS_SST_AX: SST Retrieval Coeficients data
6.5.9 ATS_VC1_AX: Visible Calibration data
6.6 Records
6.6.1 Main Product Header
6.6.2 BT/TOA Land record 50 km cell MDS
6.6.3 BT/TOA Land record 17 km cell MDS
6.6.4 LST record 50 km cell MDS
6.6.5 LST record 17 km cell MDS
6.6.6 BT/TOA Sea record 50 km cell MDS
6.6.7 BT/TOA Sea record 17 km cell MDS
6.6.8 SST record 50 km cell MDS
6.6.9 SST record 17 km cell MDS
6.6.10 Level 2 SPH
6.6.11 Grid pixel latitude and longtitude topographic correction ADS
6.6.12 Browse MDS
6.6.13 Browse SPH
6.6.14 Browse Day_Time Colour LUT GADS
6.6.15 Characterisation GADS
6.6.16 11/12 Micron Nadir/Forward Test LUT GADS
6.6.17 11/3.7 Micron Nadir/Forward Test LUT GADS
6.6.18 11 Micron Spatial Coherence Test LUT GADS
6.6.19 1.6 Micron Histogram
6.6.20 Infrared Histogram Test LUT GADS
6.6.21 12 Micron Gross Cloud Test LUT GADS
6.6.22 Fog/low Stratus Test LUT GADS
6.6.23 Medium/High Level Test LUT GADS
6.6.24 Thin Cirrus Test LUT GADS
6.6.25 General Parameters GADS
6.6.26 1.6 micron Non-Linearity Correction LUT GADS
6.6.27 Radiance to Brightness Temperature LUT GADS
6.6.28 Temperature to Radiance LUT GADS
6.6.29 General Parameters GADS
6.6.30 Validation Parameters GADS
6.6.31 Conversion Parameters GADS
6.6.32 Limits GADS
6.6.33 Master Unpacking Definition Table GADS
6.6.34 Surveillance Limits GADS
6.6.35 10-arcminute mds
6.6.36 SPH
6.6.37 Summary Quality ADS
6.6.38 Level 2 SPH
6.6.39 Distributed product MDS
6.6.40 Processor configuration GADS
6.6.41 Configuration Data GADS
6.6.42 Across-track Band Mapping Look-up Table
6.6.43 Grid pixel latitude and longtitude topographic corrections ADS
6.6.44 Scan pixel x and y ADS
6.6.45 Summary Quality ADS
6.6.46 12 micron forward view MDS
6.6.47 12 micron nadir view MDS
6.6.48 1.6 micron forward view MDS
6.6.49 1.6 micron nadir view MDS
6.6.50 Level 1B SPH
6.6.51 Visible calibration coefficients GADS
6.6.52 Auxilliary Data SPH with N = 1
6.6.53 Level 0 MDSR
6.6.54 Level 0 SPH
6.6.55 Climatology Variance Data for Land Surface Temperature Retrieval GADS
6.6.56 General Parameters for Land Surface Temperature Retrieval GADS
6.6.57 Land Surface Temperature retrieval coefficients GADS
6.6.58 Topographic Variance data for Land Surface Temperature Retrieval GADS
6.6.59 Surface Vegetation class for Land Surface Temperature Retrieval GADS
6.6.60 Vegetation fraction for Land Surface Temperature Retrieval GADS
6.6.61 ATS_SST_AX_GADSR
6.6.62 ATS_TOA_1P_ADSR_pix
6.6.63 ATS_TOA_1P_MDSR_cl
6.6.64 ATS_TOA_1P_ADSR_sa
6.6.65 ATS_TOA_1P_MDSR_conf
7 Credits