Namaste 🙏🏼 Thank you very much Sir for the details about the subject. Very well explained and it was to the point too. I had been running with Garmin watch since almost 2 years now and few of my doubts about the accuracy are cleared.
Bhai garmin watch pehnke kya mobile bina saath me liye daud sakte hain. Agar ha to bhai gps bina internet ke kaam kaise karta hai kyunki isme sim to laga nahi sakte
Awesome & informative! base on my Instinct Tactical Garmin usage, setting to multiple satellites indeed has given me a lousier signal, hence I kept my watch config to GPS only.
Running Otaku sure! I would love more detail into Firstbeat’s metrics. I have read up on things (Garmin has a pretty good summary and Firstbeat has data on their site) but I like your ability to connect with an audience and your spin on things. For context I went big and got the 945. Tried the 245 music and it’s great but it’s missing some “basic” features such as the built in altimeter. 245’s is based on GPS as is the compass. Oh no, I’m rambling!
Thank you very imformative. I heard connecting to more satelites can be less accurate if the signal of those satelites is weaker than fewer stronger sattelites.
I’ve heard it too...but I don’t believe it. 🤓 It is possible that one or more of the satellite paths can get blocked from time to time because of various obstructions, but the more satellite constellations to which you connect, the less likely this situation becomes.
Good video: regarding GPS+GLONASS, there are lots of stories that adding GLONASS can worsen accuracy. I have often wondered if it's because of the positioning of the satellites. Each constellation is relatively evenly spread across the sky. That would be the ideal condition for trilateration. But let's suppose that the watch locks on to two satellites from different constellations that happen to be fairly close to each other, from the watch's point of view. Say there's a building on one side that blocks GPS. It might block a GLONASS satellite as well, so the watch ends up grabbing an additional satellite in the other direction that's coming from about the same angle as one it already got. Those two spheres would potentially overlap to the point that you lose accuracy. The watch knows which satellites are where so should theoretically look for the one that would give the best fix, but it's a pretty simple processor, so it's possible it just grabs the first 5 or 6 it finds and stays with them until one gets blocked by a tree or building or drops below the horizon. Since GLONASS satellites are clustered around the poles, this might be more of an issue in northern lattitudes, or it might be more of an issue -- period -- compared to Galileo which is more evenly spaced out. I don't know, Garmin knows a lot more about GNSS than I do, but I wonder if that's what's going on?
I've heard those stories too...but until someone publishes test results, I have to discount their validity. Regardless, after doing the tests I've come to the conclusion that GPS+GLONASS works great in wide open conditions; for everything else, Stryd will beat the satellite based systems.
Running Otaku so I have seen studies showing roughly 50% reduction in position error, but I don’t think they were done in running-watch conditions (moving, with variable obstructions as in your tests). I don’t know. I use GPS alone and it’s ok. Close enough for a cruise missile at least 😉
Are the new Garmin watches finally starting to augment their GPS data points with accelerometer systems like Apple? My friends w older Garmins always lose miles on the trails but my AW4 is dead on. I believe this is because of Apples algorithms that combine accelerometer data w GPS data. I’m wondering if Garmin is finally catching up here?
You might be right about Apple Watch; I have the same hypothesis because AW performs WORSE on open roads then it does on the trails. I don’t think Garmin is using the accelerometer to augment distance/pace reporting.
Have you tested 'gps+glonas' vs 'gps+Galileo' readings since this video? Also do you find any difference using 'smart recording' vs 'everysecond recording'
To make things easy, I’ll just cut n paste from Garmin’s website. 😊. “You can use UltraTrac mode for extended activities. UltraTrac mode is a GPS setting that periodically turns off GPS to save battery power. When GPS is off, the device uses the accelerometer to calculate speed and distance. Speed, distance, and track data accuracy are reduced in UltraTrac mode. The accuracy of the data improves after a few outdoor runs using GPS.”
