Latency Correction

Use the Latency Correction option (Geosoft.uxo.gxnet.dll(Geosoft.GX.UXO.UxaDynamicDataLatencyCorrection;Run)*) to correct latency errors introduced by instrument timing delays.

Expand to see the locations (menus) where this option is available.

UX-Analyze extension:

• AGC Dynamic Data
• AGC Expert User > Dynamic Data Prep and QC

Latency Correction dialog options

Survey Data
Database prefix	Select the database prefix. Script Parameter:UXANALYZE.DYN_DBPREFIX
Lines to process	Select the lines you want to process. The available options are: Selected lines, Current line, and All lines. The default is Selected lines. Script Parameter:UXANALYZE.LINES_TO_PROCESS
Reference latency channel	The database channel to which the instrument delay is associated (see below). Script Parameter:UXANALYZE.REFERENCE_LATENCY_CHAN
Delay (sec)	This would be similar to the Instrument Latency Correction tool in UXO Land; where the user enters a delay in time (seconds) to shift the data. Script Parameter:UXANALYZE.LATENCY_DELAY
Original X backup channel	Specify the name of the original X backup channel (see notes below). Script Parameter:UXANALYZE.X_BACKUP_CHAN
Original Y backup channel	Specify the name of the original Y backup channel (see notes below). Script Parameter:UXANALYZE.Y_BACKUP_CHAN

Application Notes

This GX is used to help remove effects of latency errors in data caused by instrument timing delays.

Automatic Backup of Original Locations

This GX is designed so that the original locations are preserved, and are used automatically if the process should need to be repeated (for instance, if the offset direction or distance need to be altered). The methodology is as follows:

1. The first time this GX is run, the original locations are first copied into the backup channels; by default these are "UXA_X_Array_preLatency" and "UXA_Y_Array_preLatency". These channels are protected, and should not be altered by the user.

2. The GX recovers the locations from the backup channels to use in processing. The "X" and "Y" channel values are never used, except in case #1, when they are copied once (and only once) into the backup channels.

3. The "X" and "Y" channels are overwritten with the results of the offset calculation.

To restore the "X" and "Y" channels to the original values, you can enter "0" for the delay. The GX will then copy the original data back into the "X" and "Y" channels.