ROSETTA ROMAP DATA CALIBRATION DESCRIPTION                                    
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Revisions                                                                     
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2009-04-20   first issue, xxx                                                 
                                                                              
Purpose                                                                       
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This document describes the  calibration of the ROMAP-MAG and ROAMP-SPM data  
delivered in the ROMAP level 3 data set.                                      
                                                                              
ROMAP-MAG calibration                                                         
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Introduction                                                                  
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There are 2 kinds of calibrations applied to the ROMAP-MAG raw data:          
                                                                              
1) Preliminary calibrated magnetometer data  (draft aligned and very          
draft offset corrected).                                                      
                                                                              
2) Final calibration (cleaned from offset and spacecraft disturbances,        
done by TU-BS using RPC data). Only some selected data intervals are          
provided to PSA during cruise.                                                
                                                                              
The cleaning procedure consists of the following steps:                       
