This Folder:  line\
This File:    read_3rd.txt


Report Title:     Aeromagnetic Surveying in Wisconsin 1998-99:
                     Digital Data Files
Report Authors:   Robert E. Bracken and Suzanne W. Nicholson
Report Document:  U.S. Geological Survey Open-File Report 99-527



Description of This Folder and Its Content:


This folder is the entry point for all of the basic flight-line
data associated with this report.  It is designated by the
following path:

\data\line\


In this folder, you will find the following sub-folders and
files:


cmpressd\  Contains all of the basic line data at the original
           1/10-second sampling interval.  The files are in a
           compressed format and extraction software is included.
           Once uncompressed, they are in the basic ASCII format
           originally supplied by the contractor.

info\      Contains important information describing the
           line-data files (ASCII-data files).

winnowed\  Contains all of the basic line data winnowed to a
           1-second sampling interval.  The files are not
           compressed and are already in the basic ASCII format
           originally supplied by the contractor.  The winnowing
           was performed by the USGS using an appropriate
           low-pass filter on altitude and magnetic data channels
           to prevent aliasing of high-frequency data.

read_3rd.  (This file.)  Contains information describing this
           folder and its contents.