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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


2.5.4 The Level 0 Product

Once received on ground, the ISPs are converted into a Level 0 product. The Level 0 product contains Annotated Instrument Source Packets (AISPs). These are ISPs as received from the instrument with a header and associated quality information attached by the PDS Front End Processor (FEP). Each MDS record also contains a time stamp in MJD 2000 format (as converted from the Satellite Binary Time (SBT) counter embedded in each ISP), which gives the on-board sensing time of the ISP that it contains. ATS_NL_OP

As AATSR has only one nominal operating mode, there is only one Level 0 product (ATS_NL__0P). The structure of this product comprises a single MPH, a single SPH 5.1. and a single MDS containing the instrument source packet data, as shown in table 2.6 .

Table 2.6 AATSR L0 Product Structure
L0 Product Section Record
MPH MPH Record
SPH SPH Record
DSD for MDS #1
DSD for L0 Processor Configuration File used to create product
DSD for Orbit State Vectors File used to create product
DSD Spare
MDS #1 MDS Record #1
MDS Record #2
MDS Record #n

Each MDS record consists of a single annotated ISP with the structure shown in table 2.7 .

Table 2.7 Contents of AATSR L0 MDS Records
Field Description Units Size (bytes) Fields/record
1 ISP Sensing Time MJD 12 1
2 FEP Annotations* N/A 20 1
3 Packet ID N/A 2 1
4 Packet Sequence Count N/A 2 1
5 Packet Length N/A 2 1
6 Data Field Header Length N/A 2 1
7 Instrument Mode N/A 2 1
8 ICU on-board time N/A 4 1
9 Redundancy Vector N/A 2 1
10 Auxiliary Data N/A 2 390
11 Science (pixel) data N/A 2 5357
12 CRC Error code for packet N/A 2 1

* The FEP annotations describe the quality of the ISP reconstruction process and contain the following:

  • MJD 2000 Time Stamp - Ground Station Reference Time of reception;
  • Length of ISP;
  • Number of Virtual Channel Data Units (VCDUs) in the ISP which contain a Cyclic Redundancy Check (CRC) error -; as identified by a failed Cyclic Redundancy Code check;
  • Number of VCDUs in the ISP for which a Reed-Solomon error correction was performed.