diff --git a/handbook/computing/phone.html b/handbook/computing/phone.html index cac7f334c..f114fefd2 100644 --- a/handbook/computing/phone.html +++ b/handbook/computing/phone.html @@ -12,8 +12,8 @@

Phones

See Your Phone on Expo for stuff everyone should do to set up their phone for expo: photos, safety, etc. - -

This page is for those who really want to use their phone for much more than GPS tracks and cave photos. +

+See Locating entrances by GPS in the survey handbook section.

Your Android phone GPS apps

@@ -83,11 +83,7 @@ with the expo survey data workflow.
  • Of course you will have earlier noted down the names of all your photos and made a note of their contents (which you see using the phone's Gallery app) so that you can do the renaming intelligently. -

    The future

    -

    Location fixing: How to obtain a fixed point for a cave survey (2020) "Galileo High Accuracy Service (HAS) is due to become partly available in 2022 and fully available in 2024, which will offer RTPPP for free around the world, both via satellite and network connections. And there will be much rejoicing. " - This is an excellent article and nearly all of it is still absolutely true, e.g.: -

    Keep the device very still. If the position shown by GPSTest slowly refines then stops updating within a minute or two, or shows only the last digit changing slowly, then your device cannot be used for averaging. A device with 1 metre accuracy still shows the 6th and 7th decimal place digits of the longitude and latitude updating every second or so (that is a roughly 10 cm wobble every second). Unless your device can actually do 1 cm accuracy, you should be seeing those numbers change! In general, this makes most phones unusable for this purpose"
    -

    Unfortunately RTPPP has not actually caught on [2025] and it is still only available for experts and phones supporting L2 and L5 frequencies have been slower to appear than we hoped. +

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