Please consider the following:
I am looking to build a device that will be placed in a vehicle as it drives through heavy wooded areas, potentially far away from any mobile reception towers.
The hope is for this device to be able to get its GPS location in near real time, and upload said information to either, another device, or best case: the internet, but the key point would for this to be as uninterrupted as possible.
The device must not require any modification to the vehicle (attaching antenna to the roof etc) other than being powered/charged from a 12V cigarette lighter.
Is my best option here to build an app and use a high quality mobile phone, or would it be to build a custom device with some kind of satellite internet, and high quality GPS module.
If the custom device I would consider using a Raspberry Pi as the controller for it, can anyone suggest equipment that could be used in this?
I would also love to see any examples of similar projects for some brainfood.