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Elevation and GPS precision in wet condition - ISSUE

BriceK1990
over 2 years ago

Hi guys,

I recently bought a EDGE 1040 device. I have been using it for some times now. I live in Belgium, a really wet country.
I noticed that everytime it is raining and there is water on the screen, the elevation goes wrong (elevation gets stuck) AND the GPS sees me on another path close by, which is very annoying coz the device wants to recalculate the route all the time.
I've been using a Fenix 6X watch and I've never experienced such a trouble. 
I must add that I always make sure that the cover at the bottom of the unit is correctly closed !

I know there are already some subjects regarding this issue, but my question is :

- should I return the device and hope for a new one that will never have that issue OR they will all be the same ? (talking about the same unit of course).

Thanks for your answers.

Brice

  • 0 over 2 years ago in reply to Yves

    It is possible that rain water can migrate around the cover. The cover cannot be a complete seal as the sensor needs to read the current air pressure.

  • 0 over 2 years ago in reply to aweatherall

    So yesterday, if I had wiped the rain water regularly in front of the gps, it could have improved my altimeter?
    Finally the edge 1040 is unusable in the rain if I understand correctly

  • 0 over 2 years ago

    Hello!

    My curiosity went far today to check it all out.
    It's raining tonight in Ardeche with thunderstorms.
    I installed the FW 17.28 beta today to check if Garmin had made a fix for track recording drift.
    I would have hoped that the altimeter works perfectly, well you're right, as soon as it rains the altimeter does anything, a real *** without a name, like the Ventoux the day before yesterday, the elevation gain is good and the negative elevation is completely rotten, the altitude graph is wrong.
    The good consolation on these 25km covered in the rain, there was no drift, the 1040s followed the road well, however I did not have a route to follow, consequently the calculation of the altitude could be corrected via Garmin connect because the route is good, which was not the case at all on my previous outing.

    Tomorrow I will do a test again with a guided course if I have the courage to get back in the rain

    Here is the track, look at the correct track in relation to the road and look at the inconsistent elevation following a blocking of the altimeter in the rain, it is a hardware problem without a doubt!

    www.mygpsfiles.com/.../

    I am disappointed given the price of this material supposed to be the flagship of the range, I remain convinced of the uselessness of the barmeter on this device, it would be more precise to allow us to choose the altitude calculated either with the satellites, or with the barometer.

    In the shower now

  • 0 over 1 year ago in reply to raphnou

    GNSS are surprisingly imprecise in vertical measurements. Errors in the vertical are much bigger than in the horizontal because most measurements are with available satellites almost coplanar with the receiver. Stuff like grade and live climb rate would be completely impractical on that base.

    What they could do is offering GNSS elevation as a fallback option, but automatic detection woul be quite difficult because they already use the averaged delta between GNSS and barometric to compensate air pressure changes from the weather (by observing the average difference between barometric and satellite elevation over thousands of measurements)