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Last update: May 17, 2022, at 12:58 PM
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    HB17-211 SURVEY, JUNE 2017 -- USING CHIRP SONAR    

     Survey area: Fjærlands- and Aurlandsfjorden, Sogn, Norway

UNIVERSITY OF BERGEN
Department of Earth Science
 Allé gt. 41, N-5007 Bergen, Norway 
             
0.1 DRAFT - 25 August, 2017 OM OM -
VER. STATUS CHANGE DATE BY CKD APPD

INTRODUCTION


Click to see image source.

RV "Hans Brattström", Institute of Marine Research, Bergen, Norway. Link to image source.

Survey conducted in the period xx-yy June, 2017, using RV "Hans Brattström". Project leader GEO/UiB: Prof. Haflidason

Data collecting instrument: EDGETECH 3100-P SUB-BOTTOM PROFILER.

NAV DATA


Files


No. Folder on recording laptop1) Input file File time stamp Script Output file Map sample
1 C:\DATA\2017-JUNE\HB17-211 navtrack.dat001.nav 20.06.2017, 14:22:36 Chirp-navdata-2017-processing-no-1.py navtrack.dat001.nav.txt Link
2 C:\DATA\2017-JUNE\ navtrack.dat002.nav 22.06.2017, 07:51:30 Chirp-navdata-2017-processing-no-2.py navtrack.dat002.nav.txt Link
1) Recording laptop: Dell Inspiron 9400, S/N:

Processing of Nav track data files


Sample input file: "navtrack.dat001.nav"


0  3684.4210   405.1333 165 0.0 0 7 2 48 -70.9 10    0.00 0
0  3684.4209   405.1333 248 0.0 0 7 2 50 -70.9 11    0.00 0
0  3684.4209   405.1332 218 0.0 0 7 2 52 -70.9 12    0.00 0
0  3684.4208   405.1332 281 0.0 0 7 2 54 -70.9 13    0.00 0
0  3684.4209   405.1332 271 0.0 0 7 2 56 -70.9 14    0.00 0
0  3684.4209   405.1332 258 0.0 0 7 2 58 -70.9 15    0.00 0
0  3684.4209   405.1332 271 0.0 0 7 3 0 -70.9 16    0.00 0
0  3684.4211   405.1334 61 0.0 0 7 3 2 -70.9 17    0.00 0
0  3684.4211   405.1336 24 0.0 0 7 3 4 -70.9 18    0.00 0
0  3684.4212   405.1336 46 0.0 0 7 3 6 -70.9 19    0.00 0

Python script


f = open("navtrack.dat001.nav")
print "line_number,latitude,longitude,time"
line_number = 1
for line in f:
	s = line.split()
	lat = float(s[1]) / 60.0
	lon = float(s[2]) / 60.0
	time_stamp = "%02d:%02d:%02d"   %   ( int(s[6]), int(s[7]), int(s[8]) )
	point = "%05d,%1.7f,%1.7f,%s"   %  (line_number, lat, lon, time_stamp)
	print point
	line_number += 1
f.close()

Sample output file "navtrack.dat001.nav.txt"


line_number,latitude,longitude,time
00001,61.4070167,6.7522217,07:02:48
00002,61.4070150,6.7522217,07:02:50
00003,61.4070150,6.7522200,07:02:52
00004,61.4070133,6.7522200,07:02:54
00005,61.4070150,6.7522200,07:02:56
00006,61.4070150,6.7522200,07:02:58
00007,61.4070150,6.7522200,07:03:00
00008,61.4070183,6.7522233,07:03:02
00009,61.4070183,6.7522267,07:03:04
00010,61.4070200,6.7522267,07:03:06

On-line map plots, as QC indication


It's possible to upload nav data files and get map plots in return, from this web page: http://www.gpsvisualizer.com/

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Page last modified on August 25, 2017, at 01:28 PM
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