Swisha Loop 2018

Norilsk · Feb 27, 2020

Shveet said: ↑

cracks open my civil notes for GIS and GPS systems from back in the day

YOU'RE GONNA LEARN TODAY (i'll probably break off into multiple tangents here so wikipedia all that you want to know).

Yes, you are correct. The more satellites (that is part of the GNSS-Global Navigation Satellite System and also depending on your constellation; GPS-NorthAmerica, GLONASS-Russia GALILEO-Europe, COMPASS-china, IRNSS-india i think, etc.) that your device can both visually see and can manage, the more "accurate" it will be to locate your exact position. Most GPS- NorthAmerica systems actually are fairly accurate to about 0.5m to 2 meters with 3-4 satellites like with the use of your phone. But lets say if you use a proper GPS locator, that is used by surveyors, on a nice and clear day - we're talking about being within centimeters).

HOWEVER in theory, you need at least three visible GPS satellites to be able to provide all the data you need to calculate a reasonably accurate location. In practice, signals must be received from a minimum of four GPS satellites in order to correct for errors: the more the better. Modern GNSS receivers have enough "tracking channels" to follow many satellites at once, and can typically do so across multiple GNSS providers. but generally we're connected to around 6 at any given time. elevation

ADDITIONALLY, depending on the year your phone is made, make, and model, 9 times out of 10 it will have the ability to view all of if not most of the GNSS's 'visual' bands; GPS, GLONASS, GALILEO, etc etc.
This matters because at least for GPS's constellation, which is again meant for North America, float around the world, you might be able to get a reading in EU but the reading might not be accurate. but having access to GLONASS or Galielo, the phone might automatically or you'd need to manually switch 'providers' to look for the stronger constellation and tell you where you are more accurately.

As some more info on GPS (North America) and there are only around 23-24 satellites available, something like 5 of which are flying in reserved and not in use, only if one of the other satellites go down that it will turn on and continue the work of the downed unit.

But if your phone only has GPS, it may not actually work if you head to the EU or Russia or get an inaccurate readying that's out by 20-50 meters. @Norilsk can probably confirm his USSR made GPS stopped working when he landed on Canadian soil.

Understand that when you go and "buy" a GPS unit, you are actually just buying a set of maps and some navigation tools. the more money you drop, you tend to get better maps that may include hiking, ATV, Offroading, etc trails and the land base you're given might show topographical contour maps or full 3d world TIN. But Gaia is more than enough for what we do.

I used to do A LOT of geocaching

TLDR: 9 times out of 10, your phone is good enough. no need to drop $1000 on a GPS unit unless you are planning on doing global overlanding.
Or if you don't want to read the above text

$600 Garmin GPSMAP 64st, TOPO U.S. 100K with High-Sensitivity GPS and GLONASS Receiver

just grab this for $400 CAD or get this little guy for $350 for emergencies as it is basically a GPS unit and a SAT phone.
Click to expand...

TLDR: yes to whatever he said

zuknewbie · Jun 28, 2020

Anyone here got the location of the big washout, curious as to where on the loop it is. TIA

TeecoTaco · Jun 28, 2020

zuknewbie said: ↑

Anyone here got the location of the big washout, curious as to where on the loop it is. TIA
Click to expand...

Hang tight...someone will definitely answer

zuknewbie · Jun 28, 2020

Never mind, reread thread and found Eugenes map showing it.

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