<< Click to Display Table of Contents >> Navigation:  Help Content > Focusing Module > ENVISAT ASAR > Focusing - ENVISAT ASAR IM MultiFrame

Purpose

 

SAR RAW data (level 0 product) acquired by ENVISAT ASAR must be focused to generate Single Look Complex (SLC) data, which can be used as first input for data processing in any other module. This functionality enables to mosaic consecutive frames acquired along the same satellite orbit, before carrying on the data focusing.

 

The supported acquisition mode is:

 

Technical Note

 

ENVISAT ASAR IM (level 0) ESA standard format is required.

 

The following sequential processing steps are performed:

 

1.Data Import.

2.RAW data mosaic.

3.Data focusing.

 

 

DORIS

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.

 

 

Technical details relevant to the data focusing process and algorithm are provided in the module overview.

 

Input Files

 

Input DORIS file

File name of the DORIS data. This file is mandatory.

 

Input file list

Input file list of ASAR raw data. This file is mandatory.

 

Parameters - Principal Parameters

 

None.

 

Parameters - Global

 

It brings to the general section of the Preferences parameters. Any modified value will be used and stored for further processing sessions.

 

Parameters - Other Parameters

 

 

It brings to the general section of the Preferences parameters. Any modified value will be used and stored for further processing sessions.

 

Output Files

 

Output file

Output file name of the mosaiced and focused data. This file is mandatory.

 

_slc        

Single Look Complex data and corresponding header files (.sml, .hdr).

 

_par.sml        

Xml file containing temporary processing 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

 

Refer to the module overview.