So I was comparing the built in GPS Vs the recommended https://store.diydrones.com/ProductDetails.asp?ProductCode=BR-3DRLEA-6 GPS.
Not being fluent in GPS terminology I'm not too sure what makes it better than the built in one.
-Built in is 10hz vs 5hz
-Cold start time is ~10 seconds quicker on the better version, but not an improvement I'd say warrants an extra $70 being spent
-Built in draws half the current of the other
-Tracking on the built in is slightly more sensitive (-165dBm vs -162dBm)
So can someone elaborate what makes the other unit better for me please?
Also if you choose to not scrap the built in GPS (You only save $15 by removing it) and want to put the other GPS on, how is the built in one attached?
If I do get another GPS for it I would still order the built in one and use what's essentially a $15 GPS then for some other project.
Replies
Antenna four times the area for better lock and multipath resistance. Battery for near-instant lock (cold-start only needed once; and never again). Next-gen chipset for more accurate position readings.
I never understood the difference, at least as far as the specs. From the datasheets it looks like a draw at best.
You can get the ublox a lot cheaper than that though...
http://www.sunsky-online.com/view/257610/GPS+Receiver+u-blox+NEO-6M...
IMHO 95% of the reason people rave about ublox is the antenna and/or simply being external gives them better reception. OTOH maybe it has better power filtering or out-of-band interference rejection.
In any case, my built-in MT unit gives me excellent performance and I'm very happy with it.