Track & find your dog with your mobile phone
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The principle: You simply call the telephone number of the GPS PRO Dog collar with your handy /mobile phone /cell phone. The GPS receiver of the collar, estimates the position of the dog and sends the coordinates immediately as SMS (Short Message service) over the Global System for Mobile Communication (GSM) directly on your mobile phone display. The accuracy of the positioning amounts to the average less than 15 meters.
The GPS PRO Dog system works if the satellite antenna on top of the collar/backpack is able to find signals from at least 4 satellites and if the area where the dog is moving is coverd by GSM network (no other phone network service works!!). Figure 1 and 2 shows the GPS PRO Dog collar.
For communication between GPS GSM collar/backpack and mobile phone you have to insert a sim card into the collar/backpack. You can use every SIM card, maybe from a second mobile phone.