Galaxy XV / PRN 135 geo arrives at 133.1W, WAAS ranging back to 7.5meter UDRE

[macpacheco]

Galaxy XV / PRN 135 WAAS arrived this weekend at 133.1W
Ranging is now back to the best possible (for GEOs) 7.5 meter UDRE.
In its normal operating orbit, it shows up in very high elevation over
Hawaii.
In this position, PRN 135 provides full Alaska coverage, and with
ranging back to 7.5 meter, it helps the VPL levels on the west coast
of the US (a long time WAAS coverage weakness for LPV200 approaches).

If anybody from the NSTB or WAAS teams is listening, here goes a
trivial (and not terribly important) suggestion:
http://www.nstb.tc.faa.gov/incoming/waas_sats.png
It uses fixed (assumed) orbits from drawing GEO positions, that's fine
except that the fixed position used for PRN135 is about 30 degrees
off, the code that generates the image seems to assume W103 instead of
the correct W133 over the equator position.

Regards,

Marcelo Pacheco

[Alan Browne]

On 2011.04.03 9:01 , macpacheco wrote:
> Galaxy XV / PRN 135 WAAS arrived this weekend at 133.1W
> Ranging is now back to the best possible (for GEOs) 7.5 meter UDRE.
> In its normal operating orbit, it shows up in very high elevation over
> Hawaii.
> In this position, PRN 135 provides full Alaska coverage, and with
> ranging back to 7.5 meter, it helps the VPL levels on the west coast
> of the US (a long time WAAS coverage weakness for LPV200 approaches).
>
> If anybody from the NSTB or WAAS teams is listening, here goes a
> trivial (and not terribly important) suggestion:
> http://www.nstb.tc.faa.gov/incoming/waas_sats.png
> It uses fixed (assumed) orbits from drawing GEO positions, that's fine
> except that the fixed position used for PRN135 is about 30 degrees
> off, the code that generates the image seems to assume W103 instead of
> the correct W133 over the equator position.

I would bet there are better places to send that comment - where it
might actually be heard by your intended audience.

--
gmail originated posts filtered due to spam.

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[[email protected]]

On Apr 3, 9:43*am, Alan Browne >
wrote:
> On 2011.04.03 9:01 , macpacheco wrote:
>
> > Galaxy XV / PRN 135 WAAS arrived this weekend at 133.1W
> > Ranging is now back to the best possible (for GEOs) 7.5 meter UDRE.
> > In its normal operating orbit, it shows up in very high elevation over
> > Hawaii.
> > In this position, PRN 135 provides full Alaska coverage, and with
> > ranging back to 7.5 meter, it helps the VPL levels on the west coast
> > of the US (a long time WAAS coverage weakness for LPV200 approaches).
>
> > If anybody from the NSTB or WAAS teams is listening, here goes a
> > trivial (and not terribly important) suggestion:
> >http://www.nstb.tc.faa.gov/incoming/waas_sats.png
> > It uses fixed (assumed) orbits from drawing GEO positions, that's fine
> > except that the fixed position used for PRN135 is about 30 degrees
> > off, the code that generates the image seems to assume W103 instead of
> > the correct W133 over the equator position.
>
> I would bet there are better places to send that comment - where it
> might actually be heard by your intended audience.
>
> --
> gmail originated posts filtered due to spam.

Try http://www.nstb.tc.faa.gov/index.htm

Select Real-Time Interactive WAAS Performance Applications, 2D
Display

Use drop down Real Time menu on upper rigth corner,
select Satellites.