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Q: GPS systems ( Answered,   0 Comments )
Subject: GPS systems
Category: Science > Technology
Asked by: wags64-ga
List Price: $2.00
Posted: 30 May 2006 12:34 PDT
Expires: 29 Jun 2006 12:34 PDT
Question ID: 733731
Does rain reduce the accuracy of satellite navigation systems?
Subject: Re: GPS systems
Answered By: denco-ga on 30 May 2006 13:09 PDT
Howdy wags64-ga,

The "World's Most Popular GPS Information Resource," in the guise of, has all sorts of information on Global Positioning
Systems (GPS) which covers satellite navigations systems.

One would imagine that such a resource would cover your question and
they do just that.

"Rain,  Snow,  Clouds and GPS Reception"

"... Does RAIN or SNOW or CLOUDS affect the reception of my GPS receiver?
Answer:  No.  Not so as the user can tell without instrumentation.
Cloud, Rain, Snow, weather in general does NOT attenuate the GPS signals
enough to effect accuracy.  As can be seen below, the total atmospheric
loss (from all causes including rain, clouds, snow, fog, etc.) is but 2db.
This is small compared with other variables."

The above page has a table of power levels that might interest you.  It
also references a technical paper on signal specifications that you might
want to read.

"GPS SPS Signal Specification, 2nd Edition (June 2, 1995)"

"GPS SPS Signal Specification - Main Document"

"GPS SPS Signal Specification - Annex A thru C"

If you need any clarification, please feel free to ask.

Search strategy:

Google search on: rain affect satellite navigation

Looking Forward, denco-ga - Google Answers Researcher

Clarification of Answer by denco-ga on 30 May 2006 13:12 PDT
Apologies, but "satellite navigations" should have read "satellite navigation."
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