Use PiCan GPS with an external antenna
the PiCan GPS uses this chip:https://cdn-shop.adafruit.com/datasheets/GlobalTop-FGPMMOPA6H-Datasheet-V0A.pdfit has a Built-in 15X15X2.5mm ceramic patch antenna on the top of moduleandAutomatic antenna switching functionAn external antenna can be attached to the PiCan 2 GPS. Page 17 of the Datasheet has recommended specs for this external antenna. The antenna should be switched to automatically, if I understand it correctly [...]