Recording Gps Data (Ii) - di-GPS Eco ProFessional PF1-M User Manual

RECORDING GPS DATA (II)

Each satellite broadcasts a digital message that contains two types of information. One type is
ephemeris data, which includes the assigned serial number of the satellite, the status of the satellite
(healthy or faulty), current date and time. The second type is almanac data and includes precise
orbital position of every satellite in the system.
At the initial stage, ECO PF1-M GPS needs all these data for the position fixed. It usually takes a
minute to few minutes to receive all data. An open sky outdoor environment will enable faster
acquisition process. It will take a longer time at a weak signal environment. Once ECO PF1-M GPS
locks to the satellites, it will take a few seconds for reacquisition even at weak signal environment.
The EASY™ function is Embedded Assist System for quick positioning. ECO PF1-M GPS will calculate
and predict automatically the single emperies (Max. up to 3 days) when power on, and save the
predict information into the memory, ECO PF1-M GPS will use these information for positioning if no
enough information from satellites, this function will be helpful for positioning weak signal
environment.
Before the EASY™ function works properly, ECO PF1-M GPS needs to collect enough information from
satellites. The GPS usually needs 1-2 minutes to collect all information from satellites after the first fix.
Please let the GPS turn on for 1-2 minutes after the first fix for the first time of use.
ECO PF1-M GPS has a memory backup capacitor inside. The capacitor can provide about two minutes
power to the internal memory after disconnect from the camera of changing battery. To avoid the
lost of ephemeris data in the internal memory, ECO PF1-M GPS should be connected to the camera all
the time. The internal memory only consumes a very small amount of energy, it will not affect the
battery life of the camera. As the ephemeris data only be good for 3 days maximum, ECO PF1-M GPS
should be disconnected from the camera if the camera will not be used for a long period of time.
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