Hi
If you go back into the papers from the early 1980's there is one where they
used a high gain antenna and no knowledge of the coding scheme to pull timing
off of GPS. I believe it was at White Sands, but that could be wrong.
Bob
On Mar 29, 2013, at 11:42 PM, Stewart Cobb
On 3/30/13 5:31 AM, Bob Camp wrote:
Hi
If you go back into the papers from the early 1980's there is one where they
used a high gain antenna and no knowledge of the coding scheme to pull timing
off of GPS. I believe it was at White Sands, but that could be wrong.
One can just run it into
Hi
A, but they did recover the code in addition to the carrier frequency.
Given enough gain (and thus directivity) they were able to capture the full
transmission from a single bird. They could not pull the almanac data off of
it, but the sat's orbital parameters are relatively easy to
FYI: Yet another use for GPS timing signals is proposed:
http://bits.blogs.nytimes.com/2013/03/28/a-marshall-mcluhan-approach-to-weather-forecasting/
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FYI: Yet another use for GPS timing signals is proposed:
http://bits.blogs.nytimes.com/2013/03/28/a-marshall-mcluhan-approach-to-weather-forecasting/
==
It's already been done! GPS occultation sensors have been fitted to Metop-A
and Metop-B satellites, which
This would work. I know it has been tested in space already using a tiny
cube-sat but for foreasting you's need a lot of these. That is not to
bad because they are cheap and you could mass produce them. The real
problem is the very short live of a low orbit satellite. You need t keep
the
On 3/29/13 9:09 AM, David J Taylor wrote:
FYI: Yet another use for GPS timing signals is proposed:
http://bits.blogs.nytimes.com/2013/03/28/a-marshall-mcluhan-approach-to-weather-forecasting/
==
It's already been done! GPS occultation sensors have been fitted
COSMIC and (coming soon) COSMIC-2 also do GPS occultation.
Yes, but COSMIC is not a constellation of 12 satellites and it is not as
cheap either. These guys want to put up 12 satellites at a total cost of
only $160M
--
Chris Albertson
Redondo Beach, California
I wonder if you cannot do this same work from the ground. Has anyone
tried
tracking single GPS satellites from the ground using very high gain
tracking antenna.
Many times. USAF does this each time they launch a new GPS satellite, to
check out all the kit in a high-res view before they switch
On 3/29/13 2:36 PM, Chris Albertson wrote:
COSMIC and (coming soon) COSMIC-2 also do GPS occultation.
Yes, but COSMIC is not a constellation of 12 satellites and it is not as
cheap either. These guys want to put up 12 satellites at a total cost of
only $160M
COSMIC-2 is a constellation of
In message 5155f30c.4080...@earthlink.net, Jim Lux writes:
COSMIC and (coming soon) COSMIC-2 also do GPS occultation.
GPS occultation as meteologic model input was first tested and
validated on the Danish Ørsted satellite:
http://en.wikipedia.org/wiki/%C3%98rsted_%28satellite%29
gps
In message 5156611d.6090...@earthlink.net, Jim Lux writes:
occultation is pretty heavily used now.. When you talk about weather
forecasting, they talk about what percentage of the variance is reduced
by adding source X, and I seem to recall that for GPS RO it's something
like 10-15%.. around
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