GPS Antennas and the effect on Tracker power consumption

For some time I have wondered if you could improve the battery life of PICO High Altitude balloons tracker if you used the GPS’s hot fix capability.

The common GPS for PICO HABing is the UBLOX MAX8 and if that is given a battery backup supply the GPS will save the down loaded satellite data in battery backed up memory when the GPS is powered off. It should then quickly acquire a new fix when its powered back on. The potential for power saving is clear, if you only want a new GPS fix every minute or so, why have the GPS powered up and running all the time, even if its in power save mode ?

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