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GPS Status App - Altitude and Time issues

 
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Numbat
Occasional Visitor


Joined: Mar 17, 2012
Posts: 1

PostPosted: Sat Mar 17, 2012 8:40 am    Post subject: GPS Status App - Altitude and Time issues Reply with quote

Some feedback on this app:

1. It would be useful if the app displayed the current altitude. It displays the Vertical Accuracy, which is of little use without the current altitude.

2. It appears that the time displayed is the current IOS system time, NOT the time derived from the GPS signals. I tried to use the app as a time reference to set my iPhone and watch after a plane journey across time zones, but later discovered my times were over 3 min out. The GPS time signals should provide an accurate time reference but the app does not display the actual GPS time. I found another app (different author) called GPS Time but it also displays the IOS system time. I discovered how much out my time was using an app called just Time which uses several NTP servers. The advantage of using the GPS time reference is that is does not depend on phone/data network access.

I have found the app very useful for its intended purpose of confirming the accuracy or otherwise of GPS location.
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MaFt
Pocket GPS Staff
Pocket GPS Staff


Joined: Aug 31, 2005
Posts: 15125
Location: Bradford, West Yorkshire

PostPosted: Sat Mar 17, 2012 3:51 pm    Post subject: Reply with quote

The main issue with those is that iOS does not provide a standard GPS data stream via NMEA. Instead it gather all teh information it has (gps, wifi, cell) and feeds these to any apps that require 'location'.

MaFt
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M8TJT
The Other Tired Old Man
The Other Tired Old Man


Joined: Apr 04, 2006
Posts: 10118
Location: Bexhill, South Sussex, UK

PostPosted: Sat Mar 17, 2012 5:51 pm    Post subject: Reply with quote

And gets it wrong by the sounds of it Rolling Eyes . There is no excuse to get the time wrong on anything better than an egg timer these days Very Happy
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