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Purpose

 

Standard orbits, which are provided with ENVISAT products, can be updated using DORIS ones: Verified (VOR) and Precise (POR).

 

Technical Note

 

DORIS (Doppler Orbitography and Radiopositioning Integrated by Satellite) data provide precise orbital information for ENVISAT ASAR. Two versions of DORIS data are available:

 

-The VOR (Verified ORbits) are the most precise ones, but they are made available not earlier than one month after the actual satellite acquisition.

-The POR (Precise ORbits) are slightly less precise than the VOR, but they are made available together with the ASAR data.

Access to DORIS data is provided by the ESA Earth Observation Help Desk.

 

If the relevant DORIS files are already stored in an existing folder, which has been defined as DORIS Directory, they do not have to be inputted in the import processing panel since they are automatically retrieved by the program.

 

 

Input Files

 

Input Orbit File

Unzipped orbital data. This file is mandatory in case do repository directory is set in the SARscape preferences.

 

File to Update

Input file name of the SAR data (e.g. _slc) to update. This file is mandatory. The data must have been previously imported.

 

Output Files

 

_OLD...        

Copy of the header files (.sml, .hdr) containing the old - not updated - orbital parameters.

 

Details specific to the Units of Measure and Nomenclature of the output products can be found in the Data Format section.

 

General Functions

 

Exec

The processing step is executed.

 

Store Batch        

The processing step is stored in the batch list. The Batch Browser button allows to load the batch processing list.

 

Close        

The window will be closed.

 

Help

Specific help document section.

 

 

Specific Function(s)

 

None.

 

See Also

 

Task, SARscapeBatch object, SARscapeBatch script example

 

References

 

None.