Hello,
Have a serious issue with Calibration the Barometer with GPS it's altitude is fluctuating and it's not ok...proof here:
Barometer(not stable..it has big deviation more then 70m) I did test the barometer in the service menu all ok...maybe it;s software 5.33 with bugs
Do you have the same issues with Venu 2 barometer ?
wow guys, you take that really serious.
Come on - this is just a recreational sports watch to help people get some motivation and some orientation about their workouts...
It is no professional gear to…
The information you provided GPS is accurate to +/-400 feet is not valid
https://support.garmin.com/en-US/?faq=WlvNrOungC28xGtwB7hLY5
Of course, my information is valid
. Please refer…
Today's GPS receivers are extremely accurate, thanks to their parallel multi-channel design. Certain atmospheric factors and other sources (tall buildings, densely populated areas, etc…
Today's GPS receivers are extremely accurate
Where did you get this info ?
Garmin
GPS receivers are accurate to within 15 meters (49 feet) 95% of the time. Generally, users will see accuracy within 5 to 10 meters (16 to 33 feet) under normal conditions.
https://support.garmin.com/en-US/?faq=aZc8RezeAb9LjCDpJplTY7
The article you linked is about GPS (outdoor/handheld etc..). These devices are much larger and equipped with better receivers.
Furthermore, the article you linked does NOT refer to elevation, but to POSITION ACCURACY.
altitude measurement via GPS can naturally deviate by up to 120 meters. This is also described in Garmin support articles.
„GPS - This mode determines your altitude by GPS triangulation. The altitude calibrated by GPS is accurate to +/-120 m.“
Where did you get this info ?
https://support.garmin.com/en-US/?faq=En8Ve2Q5VX7nbFL0Tkuub9
GPS elevation readings from your Garmin device are a good tool for approximating elevation when you are unsure of the actual current elevation.
Elevation calibrated by GPS is accurate to +/-400 feet with a strong GPS signal.
The information you provided GPS is accurate to +/-400 feet is not valid
https://support.garmin.com/en-US/?faq=WlvNrOungC28xGtwB7hLY5
Of course, my information is valid
. Please refer to footnote (1) also in the support article you linked.
Thanks for your link.
With it you confirm my statement. The article even contains my statement twice :
Today's GPS receivers are extremely accurate, thanks to their parallel multi-channel design. Certain atmospheric factors and other sources (tall buildings, densely populated areas, etc.) of error can affect the accuracy of GPS receivers.
Garmin
https://support.garmin.com/en-US/?faq=aZc8RezeAb9LjCDpJplTY7
This article linked by you does not fit here at all, because
1) the watches do not have "parallel multi-channel design".
2) the statements in this article do NOT refer to elevation, but to POSITION.
You are confusing elevation with positional accuracy.
Also that is not normal having unstable altitude and fluctuation...
Further, the article you linked also says at the very beginning :
" With proper calibration".
What you show here in the video, however, is the calibration process ITSELF :
https://support.garmin.com/en-US/?faq=LdBgVGQf0b9dILeDnsP189&productID=707538&tab=topics
The moment you get the green GPS tick, it does not mean that the GPS reception is good.
The green tick only means that you have GPS reception at all.
For a position measurement without altitude information (2D) 3 satellites are required. If you also want to have the altitude (3D), at least 4 satellites are required.
If you ever have the opportunity to look at a GPS device with info page, you will notice on EVERY GPS device that it takes a while until enough satellites are available to provide accurate data.
In your video it takes about 30 seconds before you even have a green GPS icon. THEN the watch needs another 30 seconds (and this depends on the environment) until the elevation is calibrated.
This also writes Garmin itself.
In these 30 seconds AFTER the green tick, it is perfectly normal that the elevation must first settle.
That's what your video shows.
If you have seen other devices where this is not so, it may be because on these devices only recently a calibration was made, the altitude has not changed much since the last calibration, or the reception conditions were significantly better.
I have already described the error tolerance in GPS elevation measurement, and you have confirmed this statement again with your link.
If you still have problems with the calibration, I recommend you the DEM method via Connect Mobile, which performs the calibration according to topo data.
If that is also not enough for you, I recommend you to acquire a higher product. With these devices you also have the possibility of a completely manual calibration by manual input of both elevation and QNH (pressure).
