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Message |
john
Guest
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 Posted:
Fri Dec 09, 2005 6:55 pm Post subject:
GPS position or aerial position |
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Hello
A question to the group
Let's suppose I have a GPS at point A it is connected via a 5metre cable to
the external antenna at point B 5metres away.
What position does the gps report A or B?
Further A and B still 5metres apart but now connected via 20metres of
cable - what position?
What difference if cable is screened or not screened?
--
John |
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GSV Three Minds in a Can
Guest
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| Posted:
Mon Dec 12, 2005 5:08 pm Post subject:
Re: GPS position or aerial position |
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Bitstring <ogbo63-jpa.ln1@news2.homelinux.org>, from the wonderful
person john <john.davies@rocketmail.com> said
| Quote: |
Hello
A question to the group
Let's suppose I have a GPS at point A it is connected via a 5metre cable to
the external antenna at point B 5metres away.
What position does the gps report A or B?
|
B
And, by the way, if you record the signals at that point, you can
analyse them three days later in a lab on another continent, and you'll
still get the position (and time) of where they were collected.
--
GSV Three Minds in a Can
Contact recommends the use of Firefox; SC recommends it at gunpoint. |
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Guest
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| Posted:
Mon Dec 12, 2005 5:08 pm Post subject:
Re: GPS position or aerial position |
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john wrote:
| Quote: | Hello
A question to the group
Let's suppose I have a GPS at point A it is connected via a 5metre cable to
the external antenna at point B 5metres away.
What position does the gps report A or B?
Further A and B still 5metres apart but now connected via 20metres of
cable - what position?
What difference if cable is screened or not screened?
--
John
|
John,
The position will always be the antenna. The time delay contribution
from the cable will be common for all satellites, so it will go into
the receiver clock solution.
Tom |
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Sam Wormley
Guest
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| Posted:
Mon Dec 12, 2005 5:08 pm Post subject:
Re: GPS position or aerial position |
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john wrote:
| Quote: |
Let's suppose I have a GPS at point A it is connected via a 5metre cable to
the external antenna at point B 5metres away.
|
GPS receivers report the positions of their antennae. |
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