U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590

Skip to content
Facebook iconYouTube iconTwitter iconFlickr iconLinkedInInstagram

Federal Highway Administration Research and Technology
Coordinating, Developing, and Delivering Highway Transportation Innovations

This report is an archived publication and may contain dated technical, contact, and link information
Publication Number: FHWA-HRT-10-037
Date: October 2010

Step Frequency Ground Penetrating Radar Characterization and Federal Evaluation Tests

Appendix D: Data Import Procedures

The following section shows example data import procedures for SF GPR emissions characterization data.

ASCII data files are all named using the convention "TRACE###" where "###" is a three-digit number indicating the test number associated with the file. Antenna gain curves and cable loss factors are provided with the data files.

Microsoft Excel® Procedure

  1. Go to the Data menu.

  2. Import External Data.

  3. Import Data.

  4. Select Tab Delimited Data.

  5. Press "Next."

  6. Press "Finish."

MatLab Procedure

%---reading header info--------- fileID=fopen('G:\FAATestReportWork\FAANTIAtest2009\Trace381.csv','r'); for i = 1 : 15 header{i}=fgetl(fileID); end [junk,temp0]=strtok(header{11},','); Npoints=str2num(temp0); fclose(fileID); DataOffset=16; %---Example Data File----------- fileID=fopen('G:\FAATestReportWork\FAANTIAtest2009\Trace418.csv','r'); for i = 1: Npoints+DataOffset-1 traceA{i}=fgetl(fileID); end fclose(fileID); for m= DataOffset : Npoints+DataOffset-1 [junk,temp1]=strtok(traceA{m},','); freq(m)=str2num(junk); %13 RXpwr(m)=str2num(temp1(1:end)); end freqBiconic=freq(DataOffset:end); RXpwrBiconic=RXpwr(DataOffset:end);

Previous | Table of Contents | Next

Federal Highway Administration | 1200 New Jersey Avenue, SE | Washington, DC 20590 | 202-366-4000
Turner-Fairbank Highway Research Center | 6300 Georgetown Pike | McLean, VA | 22101