Brooke Clarke skrev:
Hi Magnus:
The improvement is probably due to a noise figure reduction from use of
the LNA if it's near the antenna rather than at the receiver end of the
cable run.
A number of assumptions is wrong there...
I have an active antenna (Novatel GPS 502), followed by about
Brooke Clarke skrev:
Hi Magnus:
The improvement is probably due to a noise figure reduction from use of
the LNA if it's near the antenna rather than at the receiver end of the
cable run.
So I am pretty sure that the improved S/N is mainly from gain and
secondary from improved noise
b...@lysator.liu.se skrev:
Brooke Clarke skrev:
Hi Magnus:
The improvement is probably due to a noise figure reduction from use of
the LNA if it's near the antenna rather than at the receiver end of the
cable run.
So I am pretty sure that the improved S/N is mainly from gain and
secondary
Magnus Danielson skrev:
b...@lysator.liu.se skrev:
If you are in Scandinavia, the GPS birds will not spend much time (if
any?) to the north of you. Slide 12 of
http://web.ics.purdue.edu/~ecalais/teaching/geodesy/Satellite_orbits.pdf
suggests that the most northerly orbital point is at the
Hi Magnus:
The improvement is probably due to a noise figure reduction from use of the LNA
if it's near the antenna rather than at the receiver end of the cable run.
Have Fun,
Brooke Clarke
http://www.prc68.com
Magnus Danielson wrote:
Magnus Danielson skrev:
b...@lysator.liu.se skrev:
If
In message 49e57132.3000...@rubidium.dyndns.org, Magnus Danielson writes:
b...@lysator.liu.se skrev:
If you are in Scandinavia, the GPS birds will not spend much time (if
any?) to the north of you. Slide 12 of
http://web.ics.purdue.edu/~ecalais/teaching/geodesy/Satellite_orbits.pdf
suggests
I had a look at it again... and I'd say it is more like 3 meters up from
the chimney, but it is still 4 m up from the roof at the chimney so it is
a bit hard to get to.
If you are in Scandinavia, the GPS birds will not spend much time (if
any?) to the north of you. Slide 12 of
If you are in Scandinavia, the GPS birds will not spend much time (if
any?) to the north of you. Slide 12 of
http://web.ics.purdue.edu/~ecalais/teaching/geodesy/Satellite_orbits.pdf
suggests that the most northerly orbital point is at the latitude of
Denmark.
With a decent antenna siting
b...@lysator.liu.se skrev:
If you are in Scandinavia, the GPS birds will not spend much time (if
any?) to the north of you. Slide 12 of
http://web.ics.purdue.edu/~ecalais/teaching/geodesy/Satellite_orbits.pdf
suggests that the most northerly orbital point is at the latitude of
Denmark.
Fellow timenuts,
You know you are a time-nut when your spring cleanup dutines involves
getting onto the rooftop and clean your GPS antennas. In my case my dual
frequency antenna (really a survey antenna, a Novatel GPS 502 L1/L2) was
due to lack of patience temporarily put up there in a not so
Hi Magnus:
Why not just put the GPS antenna at the top of the existing TV mast?
http://www.prc68.com/I/Ant.shtml#SBant
Have Fun,
Brooke Clarke
http://www.PRC68.com
Fellow timenuts,
You know you are a time-nut when your spring cleanup dutines involves
getting onto the rooftop and clean
bro...@pacific.net skrev:
Hi Magnus:
Why not just put the GPS antenna at the top of the existing TV mast?
http://www.prc68.com/I/Ant.shtml#SBant
It would be a little bit of a challenge... I think I have some 4-5 meter
of additional heigth, the tiling is slippery and then antenna rig is
Hi Magnus:
Safety is the # 1 concern. It may be that if you can minimize the
multipath problems having the GPS antenna near the roof is not a problem?
I'm starting to do some antenna related tests using the Polaris Guide
(DAGR) GPS receiver, see:
http://www.prc68.com/I/DAGR.shtml#GLS
and scroll
Joseph M Gwinn skrev:
time-nuts-boun...@febo.com wrote on 04/13/2009 11:32:48 AM:
bro...@pacific.net skrev:
Hi Magnus:
Why not just put the GPS antenna at the top of the existing TV mast?
http://www.prc68.com/I/Ant.shtml#SBant
It would be a little bit of a challenge... I think I have some
Magnus,
If you replace your RG-58 with RG-6 TV coax, your loss issues will
disappear. The difference in impedance (75 ohms instead of 50) is not
enough to cause problems. Adapters to the pre-fitted F connectors are
readily available. And it's not expensive.
Regards,
Peter
time-nuts-boun...@febo.com wrote on 04/13/2009 11:32:48 AM:
bro...@pacific.net skrev:
Hi Magnus:
Why not just put the GPS antenna at the top of the existing TV mast?
http://www.prc68.com/I/Ant.shtml#SBant
It would be a little bit of a challenge... I think I have some 4-5 meter
of
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