GSSI 200 HS, Руководство пользователя

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Geophysical Survey Systems, Inc. GS Series
200 HS Antenna
MN27-151 Rev A 23
Appendix B: File Formats
B.1: DZT
The DZT file will usually be the largest file. This is your raw, unprocessed GPR data and the most
important to keep track of.
B.2: DZX
The DZX file contains any adjustments made to the raw file. This includes gain, filters, and user marks.
When you open a file in GSSI’s post-processing software, RADAN 7, the file will first open as just the
DZT. It will then open a second time with the DZX info applied. This gives you the option to continue
with a partially processed file or go back to the raw DZT file to start over in RADAN 7.
B.3: DZG
The GPS file collected with the tablet is identified by the extension .DZG and consists of multiple two-
sentence blocks. First sentence (line) starting with $GSSIS contains the DZT file scan (trace number)
associated with the GPS location. Second sentence (line) starting with $GPGGA contains the GPS-
NMEA coordinate information.
$GSSIS sentence structure
Name Example Description
Message ID $GSSIS Fixed text identifier
File Scan # 0 File scan (trace) number, >=0
Scan Count* -1 When Pulse Per Second (PPS) is used on the GPS unit, this number is the
scan count at the specified scan rate from when the system was
started, >=0 (missing value = -1)
*The value in field 2 is convertible into seconds by subtracting the number from the value associated with
the $GSSIS record at Scan 0, then dividing by the scans/sec in the DZT file header.
Format:
$GSSIS,x,x
$GPGGA,hhmmss.ss,llll.ll,a,yyyyy.yy,a,x,xx,x.x,x.x,M,x.x,M,x.x,xxxx*hh
Example:
$GSSIS,0,-1
$GPGGA,112921.00,4343.9993927,N,00148.7984187,E,2,12,0.8,192.470,M,49.746,M,6.0,0136*46