Hi Abe
With regards your broken antenna I would suspect an email to
support@pilotaware.com will be the quickest way to order a replacement.
As to your question of satellite co-ordinates I'm not sure what you are referring to, when logged into the Home screen of the PilotAware interface via 192.168.1.1 in your web browser you should see the indicator lights for the various services down the left hand side. If the GPS is Red it is usually because the software is not seeing a GPS Dongle, if it is Amber this indicates that it has not acquired enough satellites to obtain a lock. Further along the line of text it tells you how many satellites are found. it requires at least 4 in use. This can take some time to achieve if you are indoors or have moved the unit since it was last running.
If you do not have a Green light for the GPS you will not get a green light on the P3i TX/RX or the Barometer as these are dependent on achieving a satisfactory satellite lock. I'm not aware of anywhere in the software that reports the GPS co-ordinates.