Vectronic Aerospace VERTEX Lite Collar User Manual page 65

Calculate Collar Lifetime 65
Figure 51: VERTEX Lite Collar Calculate Lifetime
The output contains the collar lifetime for the main battery whereby all functions
(GPS,VHF and satellite communication) are working and the VHF Beacon battery
lifetime whereby only the VHF Beacon will be powered for collar retrieval. It will outlive
the main battery to a degree as the back up battery size which differs for the models (1C
to 13D collar).
The window shows 3 values (Best case, Average and Worst case). In a best case
scenario, the collar is assumed to receive the ephemerides very fast and is able to
calculate its position within 45 s in Average. The Average scenario assumes an
average GPS fix calculation time of 90 seconds which should be the case for most
collars. A worst case scenario calculates with an average fix time of 180s. That might
apply in a heavily forested or relieved area where the collar has difficulties to get contact
to satellites.
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