Where To Download Acceleration Binary Files
1. Use your browser and start here: https://gipoc.grc.nasa.gov/pims/pub/pad
2. Then, use the directory structure links to navigate to GMT day of
interest, or...
enter URL directly based on year/month/day, for example...
e.g.
https://gipoc.grc.nasa.gov/pims/pub/pad/year2022/month05/day01
3. Then, use the links there to select sensor subdirectory of interest.
4. Under the sensor subdirectory, there are data and header files listed by GMT data start time.
---------------------------------------------------------------------------------------------------------------------------------
How To Read PAD Binary Files Using MATLAB
1. Download this script:
https://gipoc.grc.nasa.gov/pims/pub/plots/user/mohan/padread.m
2. Put this script on your MATLAB path, then from MATLAB command
line, type "help padread" (without quotes)
---------------------------------------------------------------------------------------------------------------------------------
Calculate Power Spectral Density (PSD) Using MATLAB Example
1. Download this script:
https://gipoc.grc.nasa.gov/pims/pub/plots/user/mohan/psdexamplescript2.m
2. Put the script somewhere on MATLAB path, then from MATLAB command
line, type "help psdexamplescript2"
*** CAUTION: the next steps may alter your base workspace in MATLAB (so save as needed before proceeding)
3. In the MATLAB command window, highlight the lines below EXAMPLE from step #2's help command, then
press F9 to evaluate.
4. Now you can try something like >> semilogy(f, pyy) to see the PSD
for y-axis.
---------------------------------------------------------------------------------------------------------------------------------
How To Read PAD Binary Files Using Python
1. Download this script:
https://gipoc.grc.nasa.gov/pims/pub/plots/user/mohan/binaryToAscii.py
2. From a command line, change to directory where you saved the python script
3. From the command line, type ./binaryToAscii.py to see usage/example
4. The ascii output files generated have 4 columns (nominally):
column 1: time (sec)
columns 2-4: acceleration (g) for x-, y-, and
z-axis, respectively
---------------------------------------------------------------------------------------------------------------------------------
For Issues Related to Timing Within/Across Data Files
1. Download this document:
https://gipoc.grc.nasa.gov/pims/pub/plots/user/mohan/PADprimer.pdf
---------------------------------------------------------------------------------------------------------------------------------
for help, email pimsops@grc.nasa.gov