Can I save my warmup to my OXTS GNSS/INS and skip the warmup process next time? 

No. The warmup process is designed to measure real-time errors from the sensors and adjust the navigation engine in the GNSS/INS to compensate for them. Those errors are different every time you start up your GNSS/INS, so your warmup from one session won’t work for another. The good news is that our latest technology can warm up with just three minutes of low-dynamic driving.