8 ms·
The fact that they can use the delay of the satellite signal to predict rainfall, is pretty impressive. It immediately links this app to more data for weather p
by nomercy400 5y ago
The fact that they can use the delay of the satellite signal to predict rainfall, is pretty impressive. It immediately links this app to more data for weather prediction, which might lead to better weather predictions.
I wonder how they would measure that on an android phone. Does android expose such low-level delays to the user? Is this not handled by a GNSS chip in hardware, or the OS driver/kernel?
- detaro 5y ago> “The combination of Galileo dual band smartphone receivers and Android’s support for raw GNSS data recording Newer Android versions have fairly low-level APIs - not supported on all phones, but some expose quite a lot of detail.
- imhoguy 5y agoHere is an example of pretty stunning amount of visual detail provided by one of popular GPS data app on Android: https://play-lh.googleusercontent.com/lT3TpHarUx89Z7HIf043aUaNDxGqadjgTaORIlGVSjGOKYhWI_UMtJL0cIFa7j82_Uwb=w2134-h1458 https://play-lh.googleusercontent.com/lT3TpHarUx89Z7HIf043aU... At least I can confirm it works will all navigation constellations on Samsung S10.
- _Microft 5y agoThis looks a lot like "GPS Status" and it used to be really good. Recent comments on the Play Store do not sound good though.
- joshvm 5y agoIt used to be, but a lot of data got pay/subscription walled I think. I would recommend GPS Test, it's open source, no ads and does just as much. https://play.google.com/store/apps/details?id=com.android.gpstest&hl=en&gl=US https://play.google.com/store/apps/details?id=com.android.gp...
- Melatonic 5y agoYea GPS Test is great!
- Aachen 5y agoLink doesn't work for me and the URL is obscured for some reason. Is my guess correct that you're linking the GPSTest app?
- piceas 5y agoSee also on F-Droid/OsmAnd https://gitlab.com/mvglasow/satstat https://gitlab.com/mvglasow/satstat
- 83 5y agoI had a lot of fun with that gps status app when I first got a smart phone - you could hold your phone up to the window while flying (to get gps signal) and see the 630mph or whatever speed you were going.
- figers 5y agoI do this with google maps even without an internet connection it shows roughly where we are in the US on a flight
- adamsmith143 5y agoI thought this was disabled above certain speeds to prevent those chips being used in Missiles?
- colechristensen 5y agoFor the limits the speed is 1200 mph and the altitude 59,000 ft. A commercial airliner won’t exceed 650 mph or 40,000 ft.
- Rebelgecko 5y agoI think those are the old COCOM limits which are no longer in effect. I believe that currently the only limit is 600 m/s (which is nice, since when there were both speed and altitude limits some manufacturers OR'd them and some manufacturers AND'd them, so it wasn't clear if altitude alone would be enough to disable a device until you found out the hard way)
- colechristensen 5y agoAh, yeah that's been updated since I've worked with GPS
- nuccy 5y agoThe idea is interesting, but there are some disadvantages of the app itself (see below). Maybe developers can read this and implement some changes. - the phone should have non-obscured view of the sky. Thus having a phone charging and logging the data while it is on the desk inside a house doesn't work that well (red or orange indicator of the measurements quality, even near a big window). - speaking of charging, there are no settings which allow to instruct the app to be dormant and automatically start recording when phone is charging. - Account and login process is needed to upload the collected data. Why is it even the case? Can't the data be uploaded anonymously with just some unique phone identifier, or without one just relying on coordinates and other GNSS related measurements. Data can be cross-checked with others nearby and outliers can be removed just from that. There is no real need to know my name, email and create a leader-board or at least have an option of anonymous upload.
- antattack 5y agoIf obstruction is static, such when one is charging the phone, it would affect absolute values but would still provide useful relative change.
- dylan604 5y agowhat if the device is charging while in a car/train/etc?
- antattack 5y agoThen software can detect it's moving.
- Fatnino 5y agoMy phone is charging from a portable battery just as often if not more often than a wall charger.
- dakr 5y agoYour phone may not be moving, but the satellites are. The obstruction is not static in that case.
- colechristensen 5y ago> Is this not handled by a GNSS chip in hardware, or the OS driver/kernel? All of the GNSS calculation is handled in hardware but that hardware often exposes quite a lot of intermediate data.