GEODAS Exchange Format Headers

To retrieve and view Header information:

Headers can be viewed for any completed Search. Select Task -> Retrieve Headers from the menu bar. Headers for surveys identified by your Search will be displayed in the Header Window and also saved in a file.

Header Window:

There are two header display windows (page 1 of 2, page 2 of 2) for each survey, including commands/buttons to move through the Headers found by the Search. In Windows, hold the mouse cursor over individual fields to see a description for the fields.

Header Fields:

Each Header is made up of fields of specified length and format which describe some aspect of the survey documentation. You may examine all the individual header fields by inspecting:
MGD77 Header Field Descriptions
HYD93 Header Field Descriptions
ARO88 Header Field Descriptions

Complete Format Descriptions:

mgd77.txt: MGD77 Format (Marine Trackline Geophysical Data)
hyd93.txt: HYD93 Format (Hydrographic Surveys Data)
aro88.txt: ARO88 Format (Aeromagnetic Surveys Data)

Command Button Descriptions

Start - This command/button returns the window to the first header from your Search.
Previous - This command/button backs up to the previous header.
Next - This command/button advances one header.
End - This command/button advances to the last header.
Exit - This command/button closes both header windows.

Retrieve Headers Output File:

When you run Task Retrieve Headers, an ASCII file is saved in your working directory with the following naming convention:
Marine Trackline Geophysics Header file: [Search KEY].h77
Hydrographic Survey Header file: [Search KEY].h93
Aeromagnetic Survey Header file: [Search KEY].h88