Global Retrieval of Cloud Information combining Oxygen A-band
and Polarization Measurements of the GOME/ERS-2
and GOME-2/METOP Instruments

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

Diego G. Loyola

German Aerospace Center (DLR), Remote Sensing Technology Institute (IMF)
Oberpfaffenhofen, D-82234, Wessling, Germany
Tel.:  +49-8153-28 1367
Fax:  +49-8153-28 1446

Accurate cloud information is required for the trace gases retrieval, especially for the determination of tropospheric contents and aerosols.

The GOME cloud retrieval algorithms developed at DLR will be used to generate global cloud products. The first algorithm OCRA is based on data fusion techniques and determines the cloud fraction using the PMD measurements. The second algorithm ROCINN is based on neural networks techniques and determines the cloud-top height and cloud-top albedo using spectral information in the Oxygen A-band in and around 760nm

The combination of the two algorithms provides a unique set of the following accurate GOME cloud parameters:
          cloud-fraction
          cloud-top height
          cloud-top albedo.

The activities envisaged within the framework of the AT-2 programme are in Phase 1 (eighteen months) the generation of a global GOME/ERS-2 cloud climatology covering the last 9 years. The activities for the second phase of the AT-2 programme concentrate mainly with the adaptation and validation of the OCRA&ROCINN algorithms using GOME-2/METOP data.

Time schedule

 

2004

2005

2006

2007

2008

Activity 1

*

*

 

 

 

Activity 2

 

*

**

*

*

Approximate manpower and cost

 

2004

2005

2006

2007

2008

Personnel / man-years

0.1

0.1

0.2

0.1

0.1

Yearly cost (kECU)

11

11

22

11

11

Likely funding agencies

DLR

Co-worker     

T. Ruppert, DLR

 


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