Table of Contents

ATOVS Level 1b Product Guide

Table of contents

  1. Introduction

  2. Reference Documents
    2.1 EPS programme documents
    2.2 SAF documents
    2.3 Papers, reports and other technical documentation

  3. ATOVS Level 1b Products Configuration History
    3.1 ATOVS Level 1b processing software
    3.2 AMSU-A Level 1b products
    3.3 HIRS Level 1b products
    3.4 MHS Level 1b products

  4. ATOVS Level 1b Products Overview
    4.1 The ATOVS instrument suite
      4.1.1 AMSU-A
        4.1.1.1 Technical description and spectral characteristics
        4.1.1.2 Scanning geometry
        4.1.1.3 Instrument calibration
      4.1.2 HIRS/4
        4.1.2.1 Technical description and spectral characteristics
        4.1.2.2 Scanning geometry
        4.1.2.3 Instrument calibration
      4.1.3 MHS
        4.1.3.1 Technical description and spectral characteristics
        4.1.3.2 Scanning geometry
        4.1.3.3 Instrument calibration
    4.2 Overview of the ground processing and calibration
      4.2.1 Pre-processing
        4.2.1.1 Geolocation
        4.2.1.2 Computation of calibration coefficients for AMSU-A and MHS
        4.2.1.3 Computation of calibration coefficients for HIRS/4
        4.2.1.4 Determination of cloud coverage for a HIRS/4 scene
      4.2.2 Level 1b processing
      4.2.3 Quality control
    4.3 ATOVS Level 1b product characteristics and use
      4.3.1 General characteristics
      4.3.2 Quality information in the products
    4.4 Summary of ATOVS Level 1b product current and potential applications

  5. Data Viewing and Reading

  6. ATOVS Level 1b Product Formats and Dissemination
    6.1 EPS products available dissemination means
      6.1.1 Satellite Direct Broadcast Service
      6.1.2 EUMETCast
      6.1.3 GTS/RMDCN
      6.1.4 EUMETSAT Data Centre
    6.2 ATOVS products dissemination
      6.2.1 Near-real-time dissemination
      6.2.2 Archive retrieval
    6.3 ATOVS EPS native product formats
      6.3.1 The EPS native formats
        6.3.1.1 General overview of the EPS generic product format
        6.3.1.2 Granularity of the EPS products
        6.3.1.3 Product format version control
        6.3.1.4 Product naming convention
      6.3.2 The AMSU-A Level 1b product format
      6.3.3 The HIRS/4 Level 1b product format
      6.3.4 The MHS Level 1b product format
      6.3.5 Deriving brightness temperatures
    6.4 The HDF format
    6.5 The WMO formats

  7. ATOVS Level 1 Product Processing Algorithms
    7.1 AMSU-A Level 1a processing details
      7.1.1 Radiance computation
      7.1.2 Geolocation
    7.2 MHS Level 1a processing details
      7.2.1 Radiance computation
      7.2.2 Geolocation
    7.3 HIRS Level 1a processing details
      7.3.1 Radiance calibration
      7.3.2 Cloud coverage
      7.3.3 Geolocation

  8. ATOVS Level 1b Products Validation

  9. ATOVS Level 1b Products Routine Monitoring

  10. ATOVS, IASI and AVHRR Processing Chain Inter-dependencies

  11. Record Description of the AMSU-A Level 1b Product

  12. Record Description of the HIRS/4 Level 1b Product

  13. Record Description of the MHS Level 1b Product

Common Appendices

  Appendix A: Summary of all EPS Products

  Appendix B: Metop Operational Orbit
    B.1 Metop orbit basic parameters
    B.2 Metop attitude law
      B.2.1 Metop yaw steering law
    B.3 Metop orbit and attitude propagation
      B.3.1 Orbit propagation
      B.3.2 Metop attitude propagation

  Appendix C: Data Types Used by the Generic EPS Format
    C.1 Basic data types
    C.2 Compound data types

  Appendix D: Format and Contents of the GRH and IPR
    D.1 Generic Record Header
      D.1.1 RECORD_CLASS enumerated values
      D.1.2 INSTRUMENT_GROUP enumerated values
      D.1.3 RECORD_SUBCLASS values
      D.1.4 RECORD_SUBCLASS_VERSION values
      D.1.5 RECORD_SIZE values
      D.1.6 Definitions of RECORD_START_TIME and RECORD_STOP_TIME values
    D.2 Generic Internal Pointer Record

  Appendix E: Acronyms and Abbreviations