Table of Contents

IASI Level 2 Products 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. IASI Level 2 Products Configuration History

  4. IASI Level 2 Products Overview
    4.1 The IASI instrument
      4.1.1 IASI Level 2 processing and data usage
      4.1.2 Sampling characteristics of IASI and collocation with ATOVS
    4.2 Overview of the Level 2 processing
      4.2.1 IASI Level 2 pre-processing
      4.2.2 IASI Level 2 cloud detection and retrieval selection
        4.2.2.1 Choice for pure IASI or combined IASI/ATOVS/AVHRR retrieval
        4.2.2.2 Cloud detection
        4.2.2.3 Determination of cloud top height and fractional cloud cover
        4.2.2.4 Selection of clear, cloud or cloud-clearing retrieval
     4.2.3 IASI Level 2 product retrieval
        4.2.3.1 Determination of climatology profiles and surface parameters
        4.2.3.2 IASI channel or super channel selection
        4.2.3.3 IASI first retrieval
        4.2.3.4 IASI iterative retrieval
    4.3 IASI Level 2 products characteristics
      4.3.1 General
      4.3.2 Vertical resolution of the temperature and humidity profiles
      4.3.3 Instrument mode and navigation information
      4.3.4 Quality and processing information in the product
    4.4 Summary of IASI Level 2 product applications

  5. The EPSView Tool as an Introduction to IASI Level 2 Products

  6. IASI Level 2 Product Formats and Dissemination
    6.1 EPS products available dissemination means
      6.1.1 EUMETCast
      6.1.2 GTS/RMDCN
      6.1.3 UMARF
    6.2 IASI products dissemination
      6.2.1 Near-real-time dissemination
      6.2.2 Archive retrieval
    6.3 IASI 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 IASI Level 2 product formats
    6.4 The HDF format
    6.5 The WMO formats
    6.6 Product readers

  7. IASI Level 2 Products Processing Algorithms

  8. IASI Level 2 Products Validation

  9. IASI Level 2 Products Routine Monitoring

  Acronyms and Abbreviations

Annexes

  Annex 1: Summary of all EPS Products

  Annex 2: Metop Operational Orbit
    A2.1: Metop orbit basic parameters
    A2.2: Metop attitude law
      A2.2.1: Metop yaw steering law
    A2.3: Metop orbit and attitude propagation
      A2.3.1: Orbit propagation
      A2.3.2: Metop attitude propagation

  Annex 4: Data Types Used by the Generic EPS Format
    A4.1: Basic data types
    A4.2: Compound data types

  Annex 5: Format and Contents of the GRH and IPR
    A5.1: Generic Record Header
      A5.1.1 RECORD_CLASS enumerated values
      A5.1.2 INSTRUMENT_GROUP enumerated values
      A5.1.3 RECORD_SUBCLASS values
      A5.1.4 RECORD_SUBCLASS_VERSION values
      A5.1.5 RECORD_SIZE values
      A5.1.6 Definitions of RECORD_START_TIME and RECORD_STOP_TIME values
    A5.2: Generic Internal Pointer Record

  Annex 6: Record Description of the IASI Level 2 Products

  Annex 7: BUFR Descriptor Sequences for the IASI Level 2 Product
    A7.1: Descriptor sequences of the reduced IASI Level 2 product on the GTS
    A7.2: Descriptor sequences of the IASI Level 2 product on EUMETCast