
- •6.1 Introduction 0
- •1.Introduction
- •2.Simultaneous operation
- •3.Flip-flop mode
- •3.1Principle
- •3.2Hci setup for flip-flop operations
- •4.Slip-sweep
- •4.1Overview
- •4.2General description
- •4.2.1Principle
- •4.2.2Correlation
- •4.2.3Cycle time
- •4.3Operation with sn388 and ve432
- •4.3.1Connections
- •4.3.2Hardware management
- •Example with two sources
- •4.3.3Hci operation environment
- •4.4More about slip-sweep
- •5.High-line noise
- •5.1General
- •Sum of filter networks
- •5.2Implementing high-line noise elimination on the hci
- •6.Harmonic line elimination
- •6.1Introduction
- •6.2Review of physical relationships on sine waves
- •2Nd harmonic phase
- •6.3General law
- •6.4Example of practical implementation
- •Combinations of 8 successive sweeps in pairs, resulting in the removal of harmonics through the stacking process.
- •6.5Applying the principle
- •7.Dpg master slave operation
- •8.Navigation
- •8.1Implementation
- •8.2One fleet or Flip-Flop navigation setup
- •8.3Slip sweep navigation setup
8.2One fleet or Flip-Flop navigation setup
When the navigation option is chosen, one aux. line process descriptor will correspond to each fleet.
There is no modification in the acquisition table only one process type is needed.
In it, a stack of one must be used. In the Aux. Corr. Descr., the button by fleet needs to be selected.
Then the auxiliary description has to be entered for each source. In the example below, the description is done for flip-flop operation; therefore two fleets are described, using the same DPG and the same pilot.
Process description for flip-flop operation with the navigation
option.
8.3Slip sweep navigation setup
The setup is similar to the one of single fleet and flip-flop one.
When the navigation option is chosen, one aux. line process descriptor will correspond to each fleet; there is no modification in the acquisition table except only one process type is needed.
In the Aux. Corr. Descr., the button by fleet needs to be selected. Then the auxiliary description has to be entered for each fleet.
Using this feature, an acquisition is started as soon as any fleet is ready at any VP.
Process description for slip sweep operation with the navigation
option for 4 fleets.
(*) Technique developed by PDO.
(*) SN388 software version 8.4 or higher
VIBROSEIS METHODS Issue : June 1999