SonTek/YSI Argonaut-XR Technical Manual - HydroScientific West

SonTek/YSI
Signal strength data is reported in internal logarithmic units called counts; one count equals
0.43 dB. See the Argonaut Principles of Operation for details on using the signal strength data.
Temperature and pressure data are sampled once per second. The mean value of temperature is
reported; mean and standard deviation of pressure are reported.
The nature of the data from the compass/tilt sensor (heading, pitch and roll) depends upon the
system configuration. For the Argonaut MD, the reported values represent the mean over the
averaging period; compass/tilt sensor data are sampled with each ping (once per second). The
Argonaut MD assumes that the system may move during the course of the averaging interval, and
performs a ping-by-ping vector average of velocity data in Earth coordinates when using the
ENU coordinate system.
For the Argonaut XR (and the Argonaut SL with compass/tilt sensor), compass/tilt data are
sampled once at the beginning of the averaging period. This value is used the mean velocity from
XYZ to ENU coordinates, and is reported with the data. For the Argonaut XR and SL, the system
is assumed stationary during the course of each averaging period. See the Argonaut Operation
Manual for more information about coordinate systems.
6.3. Amplitude Data Extraction: GARGAMP / EARGAMP
GARGAMP (or EARGAMP) extracts signal strength (amplitude) data from an Argonaut data file and
writes the results of the conversion to an ASCII file in tabular format. The command format is as
follows. Note: This software is only for systems that have the Profiling Mode option.
GARGAMP
GARGAMP
GARGAMP
File names must be given without extension. The program assumes that the Argonaut data file
has the extension .ARG. If no is specified, the program uses the same name as the
binary data file. The and parameters let you extract a subset of the
sample data. If they are not specified the program extracts all samples in the file. The program
creates ASCII output files with the extensions .A1, .A2, and .A3, which correspond to signal
amplitudes for beams 1, 2, and 3.
The program generates tabular data files with one line per sample. The first value in each line is
the sample number. This is followed by the measurement at each cell in the profile, starting with
cell 1 (closest to the transducer). The range from the instrument to the center of each cell is given
in the ASCII file generated by GARGCTL. This range can also be calculated by the formula: Range
= Blanking Distance + (Cell Number * Cell Size). Note: If the Profiling Mode option is not
installed on your system, or if ProfilingMode=NO, only one cell is available.
The measurement unit for signal strength data is an internal Argonaut unit called a count. One
count equals 0.43 dB.
6.4. Velocity Data Extraction: GARGVEL / EARGVEL
GARGVEL (or EARGVEL) extracts velocity data from an Argonaut data file and writes the data to an
ASCII file in tabular format. The command syntax is as follows. Note: This software is only for
systems that have the Profiling Mode option.
GARGVEL [options]
Argonaut Software Manual (March 1, 2001) 55