13-07-2018, 01:07 PM
Like some others about the place I have been toying with an eBay GPS receiver module and cobbling together some software to read it.
I wanted to test the behaviour of my code when the GPS lost signal.
I covered the unit with a metal bowl and connected to the unit with a terminal program (PuTTY) Surprisingly I did not lose any signal.
I then placed the unit under two metal bowls and again little loss of signal - I lost 2 of the original 11 satellites.
I then clipped the two bowls together and connected them to earth (Faraday shield style). Still nine satellites, GPS strength 1 Fix.
"Faraday Enclosure" :-
Screen capture from PuTTY. The highlighted areas are:
A = Active GPS fix.
1 = GPS fix 1 (this is a positive fix)
09 = Number of satellites
How can this be?
I disconnected the GPS unit and then restarted it thinking it may be buffering, but this made no difference. I've run it for a while now in the 'shield' but it is still reporting.
I wish my old handheld GPS unit were this sensitive
I wanted to test the behaviour of my code when the GPS lost signal.
I covered the unit with a metal bowl and connected to the unit with a terminal program (PuTTY) Surprisingly I did not lose any signal.
I then placed the unit under two metal bowls and again little loss of signal - I lost 2 of the original 11 satellites.
I then clipped the two bowls together and connected them to earth (Faraday shield style). Still nine satellites, GPS strength 1 Fix.
"Faraday Enclosure" :-
Screen capture from PuTTY. The highlighted areas are:
A = Active GPS fix.
1 = GPS fix 1 (this is a positive fix)
09 = Number of satellites
How can this be?
I disconnected the GPS unit and then restarted it thinking it may be buffering, but this made no difference. I've run it for a while now in the 'shield' but it is still reporting.
I wish my old handheld GPS unit were this sensitive