[time-nuts] Newby with questions

[Magnus Danielson]

On 02/28/2011 06:57 PM, bg at lysator.liu.se wrote:
>> On Mon, Feb 28, 2011 at 8:37 AM, David VanHorn
>> <D.VanHorn at elec-solutions.com>  wrote:
>>
>>> I've done the 48 hour survey, but my signal plot shows a big circular
>>> shaped mouse bite on the north side. I'm showing no signal up through 70
>>> degrees at north, 30 degrees from NE around to NW.   How badly will this
>>> impact me?
>>
>> The 24 GPS satellites are in orbits that never pass over the  poles.
>> I think they are about 60 degree inclinations.   By your description
>> you must be in the northern hemisphere.  If you can,  set up your
>> antenna so it can see to the south and don't worry if the view of the
>> north is blocked because as you found there is nothing to see there.
>> --
>> =====
>> Chris Albertson
>> Redondo Beach, California
>
> There are currently 32 GPS satellites.
>
>      http://tycho.usno.navy.mil/gpscurr.html
>
> Not caring about north visibility of satellites from the antenna is
> ignorant. The satellites on either side of the "hole" will help a lot with
> the geometry of you solution.
>
> I live in the southern part of Sweden, I still see satellites tracked
> directly north of me albeit a rather low elevation.

I agree with Björn here. The better north-view you can get, the more 
north-bound orbits can be used for improved symmetry.

I've been very surprised about the coverage that my current antenna 
position, so using the detected amplitude plot of lady heather.

Cheers,
Magnus