Minimize SCIAMACH Handbook version 2

FrontPage



  CHAPTER 1  
1 Introduction 1-01
1.1 The Road to SCIAMACHY 1-02
1.2 The Initial Phases of SCIAMACHY 1-03
1.3 SCIAMACHY´s Goals 1-04
1.3.1 The Atmospheric Layers 1-05
1.3.2 Anthropogenic Impact on the Earth-Atmosphere System 1-06
1.3.3 Tropospheric Chemistry 1-07
1.3.4 The Tropopause Region 1-08
1.3.5 Stratospheric Chemistry and Dynamics 1-09
1.3.6 Mesospheric Chemistry and Dynamics 1-10
1.3.7 Global Warming and Climate Change

1-10

 

 

CHAPTER 2

 
2 SCIAMACHY: The Instrument onboard ENVISAT 2-01
2.1 Measurement Goals 2-01
2.2 SCIAMACHY on ENVISAT 2-02
2.2.1 Orbit and Attitude 2-03
2.2.2 ENVISAT On-board Resources 2-04
2.2.3 ENVISAT Ground Segment 2-05
2.3 Instrument Description 2-06
2.3.1 Science Requirements and Instrument Concept 2-06
2.3.2 Optical Assembly 2-07
2.3.2.1 Scanner Mechanisms and Baffles 2-08
2.3.2.2 Telescope and Spectrometer 2-09
2.3.2.3 Detector Modules 2-10
2.3.2.4 Calibration Unit 2-11
2.3.2.5 Polarization Measurement Device 2-11
2.3.3 Thermal Subsystems 2-12
2.3.3.1 Radiator A and Active Thermal Control 2-12
2.3.3.2 Thermal Bus and Radiant Cooler Assembly 2-12
2.4 Instrument Operations 2-13
2.4.1 Sun and Moon Observation 2-14
2.4.1.1 Sun Occultation 2-14
2.4.1.2 Sub-solar Observations 2-14
2.4.1.3 Moon Occultation 2-15
2.4.2 Routine Measurement Orbit 2-16
2.4.3 Parameter Tables 2-17
2.4.4 Measurement States 2-17
2.4.4.1 Nadir States 2-17
2.4.4.2 Limb States 2-17
2.4.4.3 Occultation States 2-17
2.4.4.4 Calibration & Monitoring States 2-17
2.4.5 Timelines 2-18
2.4.5.1 Concept 2-18
2.4.5.2 Definition 2-18
2.4.6 SCIAMACHY Operations Setup

2-19

2.5 In-Orbit Operations and Performance 2002-2012 2-20
2.5.1 Mission Operations Phases 2-20
2.5.2 Instrument Configurations 2-20
2.5.3 ENVISAT Mission Extension with Orbit Change 2-21
2.5.4 Mission Planning and Subsolar Calibration Opportunities (SSCO) 2-21
2.5.5 Instrument Unavailabilities 2-22
2.5.6 Instrument Performance Evolution 2-23
2.5.6.1 Optical Performance 2-23
2.5.6.2 Detector Performance 2-23
2.5.6.3 Thermal Performance – Platform Operations 2-24
2.5.6.4 Thermal Performance – Active Thermal Control (ATC) 2-24
2.5.6.5 Thermal Control – TC 2-25
2.5.6.6 Ice in channels 7 and 8 and Decontaminations 2-25
2.5.6.7 Line-of-Sight (LoS) Pointing Performance 2-26
2.5.6.8 Life Limited Items – LLI 2-26
 

 

CHAPTER 3

 
3 SCIAMACHY's View of the Earth's Atmosphere 3-01
3.1 Tropospheric Composition - Greenhouse Gases 3-01
3.1.1 Carbon Dioxide – CO2 3-01
3.1.2 Methane – CH4 3-02
3.1.3 Water Vapour – H2O 3-03
3.1.4 Heavy Water – HDO 3-04
3.1.5 Absorbing Aerosol Index and Precipitation 3-04
3.2 Tropospheric Composition – Reactive Gases 3-05
3.2.1 Nitrogen Dioxide – NO2 3-05
3.2.2 Sulphur Dioxide – SO2 3-06
3.2.3 Formaldehyde (HCHO) and Glyoxal (CHOCHO) 3-07
3.2.4 Carbon Monoxide – CO 3-08
3.2.5 Tropospheric Halogen Oxides – BrO and IO 3-09
3.3 The Stratospheric Ozone Layer 3-10
3.3.1 Ozone – O3 3-11
3.3.2 Chlorine Dioxide – OClO 3-12
3.3.3 Bromine Oxide – BrO 3-13
3.3.4 Polar Stratospheric Clouds – PSC 3-13
3.4 The Upper Atmosphere and Solar Activity 3-14
3.4.1 Noctilucent Clouds – NLC 3-14
3.4.2 Mesospheric Ozone and the October/November 2003 Solar Storm 3-15
3.4.3 Mesopause Temperatures 3-16
3.4.4 Observing the Active Sun - The Mg II Index 3-17
3.5 The Earth Surface and Beneath 3-18
3.5.1 Land Vegetation Characteristics 3-18
3.5.2 Oceanic Light Field 3-18
3.5.3 Oceanic Phytoplankton Characteristics

3-18

3.5.4 Surface reflectivity climatology

3-18

 

 

CHAPTER 4

 
4 Calibration & Monitoring 4-01
4.1 Calibration 4-01
4.1.1 The General Calibration Equation 4-01
4.1.2 The scanner model approach 4-01
4.2 Detector Corrections 4-02
4.2.1 Channels 1-5 (UV-VIS-NIR) 4-02
4.2.2 Channels 6-8 (SWIR) 4-03
4.3 Wavelength Calibration 4-04
4.4 Stray Light 4-05
4.4.1 Spectral Stray Light 4-05
4.4.2 Spatial Stray Light 4-05
4.5 Polarisation 4-06
4.6 Radiometric Calibration 4-07
4.7 Optical Throughput Monitoring

4-08

 

 

CHAPTER 5

 
5 From Radiation Fields to Atmospheric Concentrations
– Introduction into the Retrieval of Geophysical Parameters
5-01
5.1 Radiative Transfer in the Earth’s Atmosphere 5-02
5.2 Total Column: Nadir Retrieval Schemes of DOAS-type 5-03
5.3 Cloud and Aerosol Parameter Retrieval 5-04
5.3.1 Cloud Parameters 5-05
5.3.1.1 Cloud Fraction 5-05
5.3.1.2 Cloud Top Height 5-05
5.3.1.3 Cloud Geometrical Thickness 5-05
5.3.1.4 Cloud Optical Thickness 5-05
5.3.1.5 Cloud Phase Index 5-05
5.3.2 Tropospheric Aerosol Parameters 5-06
5.3.2.1 Absorbing Aerosols 5-06
5.4 Profile Retrieval 5-07
5.4.1 Inversion Theory 5-07
5.4.2 Application of Inversion Theory to Limb Retrieval 5-08
5.5 Derivation of Tropospheric Information 5-09
5.5.1 Reference Sector Method 5-10
5.5.2 Limb/Nadir Matching 5-10
5.5.3 Convective cloud differential (CCD) approach 5-10
5.6 Data Assimilation and Value Added Products 5-10
5.6.1 Tropospheric Trace Gases – the NO2 Example 5-10
5.6.2 Stratospheric O3

5-11

 

 

CHAPTER 6

 
6 SCIAMACHY Operational Data Products and Algorithms 6-01
6.1 Level 0 Products 6-01
6.2 Operational Level 1b Products and Algorithms 6-01
6.2.1 Level 1b Processor 6-01
6.2.2 Relevant calibration parameters 6-02
6.2.2.1 Memory Effect and Non-Linearity correction 6-02
6.2.2.2 Dead and Bad Pixel Mask 6-02
6.2.2.3 Dark correction 6-03
6.2.2.4 Stray Light Correction 6-03
6.2.2.5 Wavelength Calibration 6-03
6.2.2.6 PPG/Etalon Correction 6-03
6.2.2.7 Polarization Correction 6-04
6.2.2.8 Radiometric Correction 6-04
6.2.2.9 Sun Mean Reference 6-04
6.2.2.10 Degradation Correction 6-04
6.2.3 Relevant Auxiliary Data 6-05
6.2.4 Degradation Correction: m-factors 6-05
6.2.5 Algorithm Baseline Documentation 6-06
6.2.6 Data Format Description 6-06
6.2.7 Product Quality Information 6-06
6.3 Operational Level 2 Products and Algorithms 6-06
6.3.1 Cloud and Aerosol Parameters 6-07
6.3.2 Nadir Trace Gas Retrievals 6-07
6.3.2.1 Content and filling of the background database 6-07
6.3.2.2 Application of the background values 6-07
6.3.2.3 The background database for tropospheric NO2 6-07
6.3.2.4 Ozone Total Column 6-08
6.3.2.5 NO2 Total Column 6-08
6.3.2.6 SO2 Total Column 6-09
6.3.2.7 OClO Slant Column Retrieval 6-10
6.3.2.8 HCHO Total Column Retrieval 6-10
6.3.2.9 CHOCHO Total Column Retrieval 6-10
6.3.2.10 H2O Total Column 6-11
6.3.2.11 Tropospheric NO2 6-11
6.3.2.12 Total and Tropospheric BrO 6-11
6.3.2.13 CO Total Column 6-11
6.3.2.14 CH4 Total Column 6-11
6.3.3 Limb 6-12
6.3.3.1 Ozone Profile 6-12
6.3.3.2 NO2 Profile 6-13
6.3.3.3 BrO Profile 6-13
6.3.3.4 Cloud flagging and top height 6-13
6.3.4 Algorithm Baseline Documentation 6-14
6.3.5 Data Format Description 6-14
6.3.6 Product Quality Information 6-14
6.3.7 Software Tools 6-15
6.3.7.1 Basic ERS & Envisat Atmospheric Toolbox (BEAT) 6-15
6.3.7.2 CFI Software 6-15
6.3.7.3 SciaL1c Tool 6-15
 

 

ANNEX

 
Annex 1 References Chapter 1 annex-1-01
  References Chapter 2 annex-1-02
  References Chapter 3 annex-1-03
  References Chapter 4 annex-1-04
  References Chapter 5 annex-1-05
  References Chapter 6 annex-1-06
Annex 2 Atmospheric Gases annex-2
Annex 3 Abbreviations and Acronyms annex-3
Annex 4 Frequently Asked Questions and typical EOHelp replies annex-4
Annex 5 List of Figures annex-5
Annex 6 List of Tables annex-6

 

0 Attachments
2940 Views
Average (0 Votes)
The average rating is 0.0 stars out of 5.
Comments