Originally posted by Lowell Goudge Simco. A specific to camera gps for geotaggong does not serve a lot of other uses compared to a general purpose gps. I dont see why you have to be rude about your response. If I am "ignorant" enlighten me not insult me
Entropy. I believe the issue with the gps hanging from your belt is that it is shaded by your body which is not transparent to the gps radio signal
I have a small pocket at the top of my camera pack that my gos resides in and have nonproblem. The "noise" as you put it is the difference in position as a function of which satellites are used and which are not. As you move about and turn, and as the gps swings on your belt it is constantly switching satellites.
It's a combination of body shielding and improper antenna orientation. Multipath increases when the antenna is not pointed upwards, SNR decreases, and there is now a bias towards picking up satellites in a specific direction. The first and third can cause significant bias in the position, the second doesn't help. Oh yeah, and a sideways-pointed antenna with body shielding is probably going to lose its WAAS lock too.
In your case you're using a pretty optimal configuration, if that pouch can keep the logger from turning upside down. Fabric is usually pretty transparent to RF, so your solution is going to be very close to mine (Logger velcroed to top of backpack on the outside) in performance.
That's why I am against the idea of cameras with built-in GPS or a port to connect to a GPS. The convenience gained (30 seconds to a minute per batch of photos is my average time to pull a track and geotag photos with it.) is completely offset by:
a) Having a non-optimal antenna orientation most of the time (hotshoe-mounted)
or b) Having my camera tied to a cable going to the top of my backpack (cable connection with GPS in optimal position)