I'm trying to find a document that originated at NRL, does anyone have a POC I can contact there?
The document is
H. D. Sivinski, Sandia Corporation "Acceleration - Time Pulse Shaping with an Air-Gun Facility, Shock Vibration and Associated Environments Bulletin No. 29, Part IV. June 1961.
I would have asked Sandia too but that library does not do research for other libraries at this time. It's not in DTIC.
Picatinny Armaments Technical Library
Knowledge Management Office, ESIC
Benet and Rock Island use https://picac2w6.pica.army.mil/patl
Picatinny, NJ 07806