Gravity on the move

Case History 1

Fixed-wing repeat lines

Survey Description

Date                                            September 5 to 8, 2001

Location                                       Vologda area, 450 kms N of Moscow

Survey vehicle                               Antonov 30

Survey description                         Line 1: E-W             Line 2: NW – SE;            

Length of lines                               Line 1: 61 kms        Line 2: 75 kms

Number of passes                          9 passes on each line

    2 passes of line 2 rejected due to poor GPS data

            Survey altitude                               1,037 +/- 4.8 m ASL

Ground speed                                87.2 +/- 2.0 m/sec

Wind speed                                   Variable: light to strong

Results

Processing                                     First order level and drift removed

Filter                                              86 sec

Spatial resolution                            3.75 km

RMS error from mean                      Line 1:  0.46 mGals

                                                     Line 2:  0.61 mGals

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