Appendix A Noggin Data File Format - Sensors & Software Noggin 100 User Manual

Noggin
Appendix A
Noggin data consists of two files, a Header file and a Data file. The files have the same name but
different extensions. The format details of these files are given below.
Header (.HD) File:
The header file, identified by the file extension .HD, is an ASCII file. An example is shown below.
The heading identifies what each piece of information represents.
1234
Data Collected with Noggin Plus
12/10/2000
NUMBER OF TRACES = 220
NUMBER OF PTS/TRC = 156
TIMEZERO AT POINT = 31
TOTAL TIME WINDOW = 62
STARTING POSITION = 0.0000
FINAL POSITION = 10.9500
STEP SIZE USED = 0.0500
POSITION UNITS = m
NOMINAL FREQUENCY = 250.00
ANTENNA SEPARATION = 0.3048
PULSER VOLTAGE (V) = 100
NUMBER OF STACKS = 4
SURVEY MODE = Reflection
This file can be read and/or printed using any Word Processor.
Data (.DT1) File:
The data file contains as many records as there are traces. Each record in turn consists of a
header section and a data section. The header section consists of an array of 25 real*4 numbers
and a string of 28 characters which is used for annotation. The 25 element real array contains the
following information:
Item #
1
2
3
4
5
6
7
8
9-10
11-12
13-14
15
Noggin Data file Format
Description
Trace number
Position
Number of points per trace
Topographic data, if available
(not used)
# bytes/point (always 2 for Rev 3 firmware)
Time Window
# of stacks
reserved for GPS X position (double*8 number)
reserved for GPS Y position (double*8 number)
reserved for GPS Z position (double*8 number)
reserved for receiver x position
Appendix A - Noggin Data file Format
A-1