Application of instrumentation recorders for data acquisition in hostile environments has for years been accomplished by means of longitudinal recorders specially designed for that application. Two recent trends have impacted the applicability of these machines: the need for record times longer than can be provided by the longitudinal machines and the trend in the instrumentation industry to utilize digital recording techniques.
Victor Leung, Victor Leung,
"A High Data Rate Airborne Rotary Digital Recorder With Long Record Time", Proc. SPIE 0979, Airborne Reconnaissance XII, (23 February 1989); doi: 10.1117/12.948614; https://doi.org/10.1117/12.948614