iPhone 4s GPS Accuracy

Submitted by Anonymous on

Forums: 

From: <marv [at] lancair.net>
Subject: iPhone 4s GPS Accuracy
Date: Fri, 21 Feb 2014 07:58:10 -0500
To: <lml>

Posted for "Reinath, Michael S. (ARC-AM)"
<michael.s.reinath [at] nasa.gov>:

> Yesterday I noticed that my iPhone 4s GPS accuracy was significantly
> poorer than normal. The
Foreflight accuracy showed only 65m. Today I am
> seeing the same thing. My iPad, however, shows the normal 5m to 10m
> accuracy. I first
noticed this yesterday when I tried to use my running
> app. The GSP bar would not go green. I started Foreflight and could not
> get
better than 65m on the iPhone. The same thing happened today. I have
> been using this app since last summer five times a week and this is
the
> first time I have had this problem. I have always been able to get at
> least 10m in Foreflight on the iPhone. I did a quick Google
search and
> found 2 different forums where postings have been made about the same
> issue in the past two days -- poorer than normal
accuracy, starting about
> two days ago.
>
> Anyone know what¹s going on? Weaker GPS signal? Solar flares? Anyone
> notice
this on other iPhone models?
>
> Mike Reinath
> LNC2 N3602M
>


[The Air Force launched a rocket last
night with a new GPS satellite... I can't imagine that they would degrade the rest of the system to facilitate the insertion of a new satellite,
but.....  <M>   ]

iPhone 4s GPS Accuracy

Submitted by Anonymous on

From: <tednoel [at] cfl.rr.com>
Sender: <marv [at] lancaironline.net>
Subject: Re: [LML] iPhone 4s GPS Accuracy
Date: Fri, 21 Feb 2014 10:02:02 -0500
To: <lml [at] lancaironline.net>
Message Header


Undecoded Message

This would be life-threatening for golfers who want 1-meter accuracy on their smartphone based Golf GPS apps...





:-)







As for flying, is 50 meters a real problem on anything other than approach? We watch altitude on an altimeter, which is critical. Ditto for airspeed. And an iPhone isn't legal or wise for an approach, but even if it was, can anyone fly closer than 50 meters?



Ted Noel





---- marv [at] lancair.net wrote: