I have a use case where I want to leave an NS-RAW on the greenland ice sheet during the polar night to record to SD for as long as possible (months to half a year). I expect temperatures to drop below -50C and there is a real problem with most batteries. So I want to minimize power comsumption to an absolute minimum. My initial imperfect measurements indicate i would need in the order of 250Ah with the latest firmware.
GOAL: I would really like to be able to detect very small changes in average monthly velocities (horizontal). E.g. a speed up from 20cm/day in december to 21cm/day in january. Or something even better.
My questions are:
* Would it be feasible to reduce power consumption significantly by modifying the firmware?
* Does it make sense i have an external timer to switches off the GPS - 90% of the time. (in this case what would be the best strategy to get highest possible precision. Record continuously for 2 hours a day? 1 hour every 12 hours? 12hours once a week?)