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GPS satellite elevation angle calculation

 
 
Antonio
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      07-25-2003, 12:27 AM
Hello all,

Your assistance will be very acknowledged.

Suppose the coordinates of two points in 3D-space are given as:

P1 (xs, ys, zs) (GPS satellite, for instance)
P2 (xu, yu, zu) (GPS user, for instance)

Is there any available formula for calculation the elevation angle of
the GPS satellite as observed on user location? Any suggestion with
the calculation error not larger than 5% will be very appreciated.
Reference is not required, but will be very useful.

Regards,

Antonio
 
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Sam Wormley
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      07-25-2003, 04:07 AM
Antonio wrote:
>
> Hello all,
>
> Your assistance will be very acknowledged.
>
> Suppose the coordinates of two points in 3D-space are given as:
>
> P1 (xs, ys, zs) (GPS satellite, for instance)
> P2 (xu, yu, zu) (GPS user, for instance)
>
> Is there any available formula for calculation the elevation angle of
> the GPS satellite as observed on user location? Any suggestion with
> the calculation error not larger than 5% will be very appreciated.
> Reference is not required, but will be very useful.
>



Many GPS receivers report Azimuth and Elevation angle for each satellite
currently being tracked to an accuracy of about one degree. There is online
software for similar calculations.

-Sam Wormley
http://edu-observatory.org/gps/tracking.html
 
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Sam Wormley
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      07-25-2003, 04:11 AM
Antonio wrote:
>
> Hello all,
>
> Your assistance will be very acknowledged.
>
> Suppose the coordinates of two points in 3D-space are given as:
>
> P1 (xs, ys, zs) (GPS satellite, for instance)
> P2 (xu, yu, zu) (GPS user, for instance)
>
> Is there any available formula for calculation the elevation angle of
> the GPS satellite as observed on user location? Any suggestion with
> the calculation error not larger than 5% will be very appreciated.
> Reference is not required, but will be very useful.
>



Many GPS receivers report Azimuth and Elevation angle for each satellite
currently being tracked to an accuracy of about one degree. There is online
software for similar calculations.

-Sam Wormley
http://edu-observatory.org/gps/tracking.html
 
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Sam Storm van Leeuwen
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Posts: n/a
 
      07-25-2003, 09:49 AM
(E-Mail Removed) (Antonio) wrote in
news:(E-Mail Removed) om:

> Hello all,
>
> Your assistance will be very acknowledged.
>
> Suppose the coordinates of two points in 3D-space are given as:
>
> P1 (xs, ys, zs) (GPS satellite, for instance)
> P2 (xu, yu, zu) (GPS user, for instance)
>
> Is there any available formula for calculation the elevation angle of
> the GPS satellite as observed on user location? Any suggestion with
> the calculation error not larger than 5% will be very appreciated.
> Reference is not required, but will be very useful.
>
> Regards,
>
> Antonio


Hi Antonio,

Try http://home-2.worldonline.nl/~samsvl/calcazel.htm

Sam (the other)

 
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Antonio
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      07-25-2003, 01:26 PM
Sam Wormley <(E-Mail Removed)> wrote in message news:<(E-Mail Removed)>...
> Antonio wrote:
> >
> > Hello all,
> >
> > Your assistance will be very acknowledged.
> >
> > Suppose the coordinates of two points in 3D-space are given as:
> >
> > P1 (xs, ys, zs) (GPS satellite, for instance)
> > P2 (xu, yu, zu) (GPS user, for instance)
> >
> > Is there any available formula for calculation the elevation angle of
> > the GPS satellite as observed on user location? Any suggestion with
> > the calculation error not larger than 5% will be very appreciated.
> > Reference is not required, but will be very useful.
> >

>
>
> Many GPS receivers report Azimuth and Elevation angle for each satellite
> currently being tracked to an accuracy of about one degree. There is online
> software for similar calculations.
>
> -Sam Wormley
> http://edu-observatory.org/gps/tracking.html


Sam,

Thank you very much for a very useful list!

Antonio
 
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