Programs to support digital data acquisition using HPGdaac High Performance Graphical data acquisition and control
- clone software from github e.g., to your ~/Code/ directory
mkdir ~/Code
cd ~/Code
git clone https://github.com/hpgavin/HPGnumlib
git clone https://github.com/hpgavin/HPGdaac-xtra
- make and make install
cd ~/Code/HPGdaac-xtra
make clean
make
sudo make install
HPGdaac-xtra contains a set of sixteen command line programs written in C to support digitial data acquisition from analog sensors using HPGdaac. There are two kinds of programs:
- Programs to generate waveform data files to be converted to analog signals by HPGdaac
- Programs to process waveform data files measured and recorded by HPGdaac
- bwrand.c - Generate a vector of gaussean band-limited random noise
input: sr : sample rate (samples per second)
offset : offset from zero
ampl : ampliutde (percent full scale)
f_lo : low frequency limit of band-limited noise
f_hi : high frequency limit of band-limited noise
T : time duration of the data
Seed : seed of the random number generator
outFile : output data file
output: u : random output signal
usage
bwrand sr offset f_lo f_hi T seed outfile
- chirpq.c - Generate a file of square waveform data with changing frequency and amplitude
input: sr : sample rate (samples per second)
offset : offset from zero
ao : initial amplitude
af : final amplitude
fo : initial frequency
ff : final frequncey
T : time duration of the data
p : amplitude distribution
q : frequency distribution
outFile : output data file
output: u : square wave data
usage
chirps sr offset ao af fo ff T p q outFile
- chirps.c - Generate a file of sinusoidal waveform data with changing frequency and amplitude
input: sr : sample rate (samples per second)
offset : offset from zero
ao : initial amplitude
af : final amplitude
fo : initial frequency
ff : final frequncey
T : time duration of the data
p : amplitude distribution
q : frequency distribution
outFile : output data file
output: u : sine wave data
usage
chirps sr offset ao af fo ff T p q outFile
- chirpt.c - Generate a file of triangular waveform data with changing frequency and amplitude
input: sr : sample rate (samples per second)
offset : offset from zero
ao : initial amplitude
af : final amplitude
fo : initial frequency
ff : final frequncey
T : time duration of the data
p : amplitude distribution
q : frequency distribution
outFile : output data file
output: u : triangle wave data
usage
chirpt sr offset ao af fo ff T p q outFile
- ktrand.c - synthetic earthquake ground motion with the Kannai Tajimi spectrum
Program ktrand.c - synthetic earthquake ground motion with the Kannai Tajimi spectrum
input: sr : sample rate, samples per second
offset : static offset %FS
RMS : rms amplitude ( > 0 ) %FS
fg : natural frequency of ground motion, Hz
zg : damping ratio of ground motion
aa : envelope rise parameter
tt : envelope decay parameter
T : time duration, s
seed : seed of the random number generator
file : name of output file
output: Accel : ground acceleration
usage
ktrand sr RMS fg zg aa tt T seed datafile
- impulse.c - Generate a file with impulse-like waveform data.
input: sr : sample rate, samples per second
Tp : period of the impulse
Nc : number of cycles in the impulse
T : duration of the record
Vp : impulse amplitude ( > 0ber generator
file : name of output file
usage
impulse sr Tp Nc T impulse.dat
- ramp.c - Generate a file of ramp data with constant velocity
usage
ramp
- baseline.c - Perform baseline correction on waveform data
input: infile : input data file
output: output : output data file
usage
baseline <infile> <outfile>
- glue.c - glues data file A to data file B, column-wise.
Data files A and B are multi-column data files, which have a set of 'header' lines starting with a # or % character. Data file A can have more rows than data file B, but can not have less rows than data file B.
The 'glued' file will use the header of data file A and will place the columns of data file B after the last column of data file A. If data file A is longer than data file B, the additional rows of data will be zero's.
... currently, file B must be a one-column data file ...
usage
glue fileA fileB fileC
- limits.c - scans a data file and keeps track of max and min usage
limits <filename>
- resample.c - Re-samples a multi-column time history data file.
usage
resample in_file out_file
- scale.c - scales a time series recorded by HPGdaac and saved as integers between ADMIN and ADMAX. Divides by the sensor sensitivity and deals with channel-to-channel skew. Optionaly corrects clipped data, smoothes data, and detrends data.
Clip Correction Types:
0: none
3: cubic polynomial
5: fifth order polynomial
Detrending Types:
0: none
1: debias
2: detrend
3: baseline
4: first_pt
5: peak_peak
usage
scale 'sensor configuration file' 'raw data file' 'scaled data file' 'stats file'
Sensor configuration file format
Descriptive Title (one line only)
X label : "time, sec"
Y label : "volts"
integChnl :
diffrChnl :
Channel Label Sensitivity V/Unit DeClip Detrend Smooth
===============================================================================
0 "table accel." 0.004048 "cm/s/s" 0 3 0.1
1 "table displ." 1.312 "cm" 0 3 0.1
2 "platfm displ. 1" 1.000 "cm" 5 4 0.1
3 "platfm displ. 2" 1.000 "cm" 5 4 0.1
4 "platfm displ. 3" 1.000 "cm" 5 4 0.1
5 "platfm accel. 1" 0.004048 "cm/s/s" 3 4 0.1
6 "platfm accel. 2" 0.004048 "cm/s/s" 3 4 0.1
7 "platfm accel. 3" 0.004048 "cm/s/s" 3 4 0.1
-
skew.c - calculate the channel to channel skew of an AD device
-
xfer.c - calculates frequency response functions H1, H2, and Hv, and the associated power spectra Gu, Gy, and Guy using data sets x & y. Averaging and Windowing are Incorporated.
usage
xfer <data file>
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