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Re: How to send emergency numbers over email to neighbors for Android & iPhone
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Poutnik
Sep 3, 2014, 1:30:43 AM9/3/14
to
Dne 3.9.2014 v 01:56 Ninghong napsal(a):
> On Tue, 02 Sep 2014 17:09:22 -0400, nospam wrote:
>
>> you don't need to manually turn the gps on and something is wrong if it
>> takes 5 minutes to get a fix.
>>
>> usually it has a rough idea instantly and will get a complete fix within
>> a couple of seconds
>
> My friend goes backcountry hiking with me.
> It takes his phone MINUTES to get a GPS fix.
> Mine? It takes seconds.
>
> So, I think it depends on the phone since we're both standing next to
> each other. He has a different carrier, but I don't think that's a factor
> in GPS fixes.
>
It depends on if Assisted GPS ( aGPS ) is used with GPS or not.
GPS system need periodically refresh satellite orbit data,
that are obtained either from internet ( fast ),
either directly from satellites ( slow ).
The latter can be very slow in worst cases.
Many people in my country have GPS in their phone,
but their data connection in not intentionally activated.
Either they do not want to use internet in their phones,
either they do not want to pay data subscription.
The data are of 2 kinds:
"Almanach", which is information about approximate positions of
satellites, to know what satellites are visible for given time and
locations, and approximate position.
This is valid in advance of few weeks, and can take at ideal receiving
conditions up to 12 minutes to receive them, if no data.
"Ephemeris", which is exact information about satellite position for
given time, that is valid for some hours, perhaps few days.
Receiving can take probably dozens of seconds or few minutes.
--
Poutnik
> On Tue, 02 Sep 2014 17:09:22 -0400, nospam wrote:
>
>> you don't need to manually turn the gps on and something is wrong if it
>> takes 5 minutes to get a fix.
>>
>> usually it has a rough idea instantly and will get a complete fix within
>> a couple of seconds
>
> My friend goes backcountry hiking with me.
> It takes his phone MINUTES to get a GPS fix.
> Mine? It takes seconds.
>
> So, I think it depends on the phone since we're both standing next to
> each other. He has a different carrier, but I don't think that's a factor
> in GPS fixes.
>
It depends on if Assisted GPS ( aGPS ) is used with GPS or not.
GPS system need periodically refresh satellite orbit data,
that are obtained either from internet ( fast ),
either directly from satellites ( slow ).
The latter can be very slow in worst cases.
Many people in my country have GPS in their phone,
but their data connection in not intentionally activated.
Either they do not want to use internet in their phones,
either they do not want to pay data subscription.
The data are of 2 kinds:
"Almanach", which is information about approximate positions of
satellites, to know what satellites are visible for given time and
locations, and approximate position.
This is valid in advance of few weeks, and can take at ideal receiving
conditions up to 12 minutes to receive them, if no data.
"Ephemeris", which is exact information about satellite position for
given time, that is valid for some hours, perhaps few days.
Receiving can take probably dozens of seconds or few minutes.
--
Poutnik
Rod Speed
Sep 3, 2014, 2:44:24 AM9/3/14
to
Poutnik <pou...@privacy.net> wrote
> Ninghong wrote
> GPS system need periodically refresh satellite orbit data,
> that are obtained either from internet ( fast ),
> either directly from satellites ( slow ).
> The latter can be very slow in worst cases.
But the worst case isnt that common with cellphones.
> Many people in my country have GPS in their phone,
> but their data connection in not intentionally activated.
Doesn't need to be for a very fast GPS fix.
> Either they do not want to use internet in their phones,
> either they do not want to pay data subscription.
Doesn't need to be for a very fast GPS fix.
> The data are of 2 kinds:
> "Almanach", which is information about approximate positions
> of satellites, to know what satellites are visible for given time
> and locations, and approximate position.
> This is valid in advance of few weeks, and can take at ideal
> receiving conditions up to 12 minutes to receive them, if no data.
> "Ephemeris", which is exact information about satellite position
> for given time, that is valid for some hours, perhaps few days.
> Receiving can take probably dozens of seconds or few minutes.
But isnt necessary unless the phone has
been moved a long way turned off.
> Ninghong wrote
>> nospam wrote
>>> you don't need to manually turn the gps on and
>>> something is wrong if it takes 5 minutes to get a fix.
>>> usually it has a rough idea instantly and will
>>> get a complete fix within a couple of seconds
>> My friend goes backcountry hiking with me.
>> It takes his phone MINUTES to get a GPS fix.
>> Mine? It takes seconds.
>> So, I think it depends on the phone since we're both standing next to
>> each other. He has a different carrier, but I don't think that's a factor
>> in GPS fixes.
> It depends on if Assisted GPS ( aGPS ) is used with GPS or not.
It always is with cellphones.
>>> you don't need to manually turn the gps on and
>>> something is wrong if it takes 5 minutes to get a fix.
>>> usually it has a rough idea instantly and will
>>> get a complete fix within a couple of seconds
>> My friend goes backcountry hiking with me.
>> It takes his phone MINUTES to get a GPS fix.
>> Mine? It takes seconds.
>> So, I think it depends on the phone since we're both standing next to
>> each other. He has a different carrier, but I don't think that's a factor
>> in GPS fixes.
> It depends on if Assisted GPS ( aGPS ) is used with GPS or not.
> GPS system need periodically refresh satellite orbit data,
> that are obtained either from internet ( fast ),
> either directly from satellites ( slow ).
> The latter can be very slow in worst cases.
> Many people in my country have GPS in their phone,
> but their data connection in not intentionally activated.
> Either they do not want to use internet in their phones,
> either they do not want to pay data subscription.
> The data are of 2 kinds:
> "Almanach", which is information about approximate positions
> of satellites, to know what satellites are visible for given time
> and locations, and approximate position.
> This is valid in advance of few weeks, and can take at ideal
> receiving conditions up to 12 minutes to receive them, if no data.
> "Ephemeris", which is exact information about satellite position
> for given time, that is valid for some hours, perhaps few days.
> Receiving can take probably dozens of seconds or few minutes.
been moved a long way turned off.
nospam
Sep 3, 2014, 1:07:14 PM9/3/14
to
In article <lu6922$1j0$1...@dont-email.me>, Poutnik <pou...@privacy.net>
wrote:
> Many people in my country have GPS in their phone,
> but their data connection in not intentionally activated.
> Either they do not want to use internet in their phones,
> either they do not want to pay data subscription.
a data connection is not needed, nor is active service.
all that's needed is a cellular signal for assist.
wrote:
> Many people in my country have GPS in their phone,
> but their data connection in not intentionally activated.
> Either they do not want to use internet in their phones,
> either they do not want to pay data subscription.
all that's needed is a cellular signal for assist.
Poutnik
Sep 3, 2014, 1:16:23 PM9/3/14
to
Dne 3.9.2014 v 19:07 nospam napsal(a):
My phone disagrees with you.
Celullar signal itself never provided me GPS data
for quick GPS fix.
But this can be country and provider specific.
--
Poutnik
Wise man guards the words he says,
as they may say about him more,
than he says about the subject.
Celullar signal itself never provided me GPS data
for quick GPS fix.
But this can be country and provider specific.
--
Poutnik
Wise man guards the words he says,
as they may say about him more,
than he says about the subject.
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