NNORSY Ozone Profile Retrieval Suite (NNORSY-SUITE)

A contribution to ACCENT-TROPOSAT-2, Task Group 1

Anton K. Kaifel

Center for Solar Energy and Hydrogen Research (ZSW), Baden-Württemberg
Industriestr. 6 , 70565 Stuttgart, Germany
 Tel.:  +49-(0)711-7870 238, Fax: +49-(0)711-7870 200
 

The Neural Network Ozone Retrieval SYstem (NNORSY) was developed in recent years and was successfully applied to long term GOME-1 data for retrieval of total ozone and ozone profiles (NNORSY-GOME). It was be shown, that NNORSY-GOME is able to retrieve ozone profiles with good quality not only in the stratosphere but also in the troposphere differentiating up to 3 different ozone profile layers in the troposphere. Furthermore NNORSY-GOME is able to compensate degradation effect of the GOME instrument during training. This yield to ozone profile products independent of degradation effects which can be used for studying GOME degradation properties. NNORSY-GOME was also implemented in near-real-time (http://wdc.dlr.de/data_products/SERVICES/GOMENRT/index.html).

Within this project it is envisaged to further develop NNORSY for application to various current and upcoming satellite instruments; namely GOME-1 on ERS2, SCIAMCHY on ENVISAT, OMI on AURA, GOME-2 and IASI on MetOp.

The first 18 month of the project comprise the following tasks.

·        Update and improvements for NNORSY-GOME-1 with special emphasis to the troposphere.

·        Reprocessing of the whole GOME-1 time range from July 1995 to end of 2003 providing long term global ozone profile data for the troposphere.

·        Set up of a new ozone profile climatology for the troposphere based on a new neural network approach.

·        Development of NNORSY-SCIA system enabling the combined use of limb and nadir UV/VIS/IR spectra in one retrieval step for ozone profile retrieval. This shall yield to improved ozone profile retrievals over the full height range of the stratosphere and especially for the troposphere compared to the use of nadir or limb data only. An other advantage of NNORSY is the independence of retrieval accuracy from calibration uncertainties  which are still effecting SCIAMACHY Level 0 to 1 processing and ozone profile retrieval.

Next steps after the first phase of 18 months are:

·   NNORSY-SCIA: Implementation NNORSY ozone profile retrieval for SCIAMACHY data in near-real-time (NRT) at DLR.

·   NNORSY-OMI: Implementation of NNORSY ozone profile retrieval for OMI instrument on AURA satellite.

·   NNORSY-GOME-2:´Development of NNORSY ozone profile retrieval system for GOME-2 MetOp  and  NRT implementation at DLR

·   NNORSY-IASI: Development of NNORSY ozone profile retrieval system for ISAI IR measurements.

Time schedule

Tasks

2004

2005

2006

2007

2008

2009

NNORSY-GOME-1

*

*

 

 

 

 

Ozone profile climatology for troposphere

 

*

 

 

 

 

NNORSY- SCIA

 

*

**

 

 

 

NNORSY- SCIA NRT

 

 

**

 

 

 

NNORSY-OMI

 

 

*

**

 

 

NNORSY-MetOp

 

 

 

**

**

 

NNORSY-IASI

 

 

 

*

**

*

Approximate manpower and cost

 

2004

2005

2006

2007

2008

2009

Personnel / man-years

0.5

1.0

1.0

1.0

1.0

1.0

Yearly cost (kECU)

50

100

100

100

100

100

Likely funding agencies

German National Bodies (e.g. BMBF), ESA, EUMETSAT

Co-workers

Jasmine Kaptur

Center for Solar Energy and Hydrogen Research, Baden-Württemberg
Industriestr. 6 , 70565 Stuttgart, Germany

Diego Loyola

Deutsches Zentrum für Luft- und Raumfahrt
Remote Sensing Technology Institute (IMF)
Postfach 1116, 82230 Weßling, Germany

 

 

 


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