On 17 Sep 2014 23:38, Peter Putnam n...@sbcglobal.net wrote:
Greetings,
The link below describes a homemade GPS receiver.
It is presented in a detailed and elegant manner that is certain to
appeal to this reflector's subscribers.
Peter
http://www.aholme.co.uk/GPS/Main.htm
I don't
On Fri, Sep 26, 2014 at 10:07:56AM +0100, Dr. David Kirkby (Kirkby Microwave
Ltd) wrote:
I don't understand the units of signal strength
The L1 carrier is spread over a 2 MHz bandwidth and its strength at the
Earth's surface is -130 dBm. Thermal noise power in the same bandwidth is
-111
From gpsinformation.net:
In the frequency allocation filing the L1 C/A power is listed as 25.6
Watts. The Antenna gain is listed at 13 dBi. Thus, based on the
frequency allocation filing, the power would be about 500 Watts (27
dBW).
Now, the free space path loss from 21000 km is about 182 dB.
On 26 Sep 2014 13:01, Andrea Baldoni erm1ea...@ermione.com wrote:
On Fri, Sep 26, 2014 at 10:07:56AM +0100, Dr. David Kirkby (Kirkby
Microwave Ltd) wrote:
I don't understand the units of signal strength
The L1 carrier is spread over a 2 MHz bandwidth and its strength at the
Earth's
It is because of the processing gain and I believe these to be normal
figures.
Not an expert here but when the system de-spreads the signal the
information pops up above the noise since the noise is random and the
spread carrier only appears random.
Regards
Paul
WB8TSL
On Fri, Sep 26, 2014 at
Hello,
I need to have remotely access to Trimble Thunderbolt-E to manage it.
I first sort out the physical (network) parts to get the Serial port out on the
network (unit CSE-H53N from Sollae Systems).
For management I am looking to use SNMP.
Is there any system capable to convert the serial
On Fri, Sep 26, 2014 at 8:17 AM, Luc Gaudin lgau...@naelcom.com wrote:
Hello,
I need to have remotely access to Trimble Thunderbolt-E to manage it.
I first sort out the physical (network) parts to get the Serial port out
on the network (unit CSE-H53N from Sollae Systems).
For management I
On 26 September 2014 13:52, Azelio Boriani azelio.bori...@gmail.com wrote:
From gpsinformation.net:
In the frequency allocation filing the L1 C/A power is listed as 25.6
Watts. The Antenna gain is listed at 13 dBi. Thus, based on the
frequency allocation filing, the power would be about
On Fri, Sep 26, 2014 at 4:07 AM, Dr. David Kirkby (Kirkby Microwave Ltd)
drkir...@kirkbymicrowave.co.uk wrote:
On 17 Sep 2014 23:38, Peter Putnam n...@sbcglobal.net wrote:
Greetings,
The link below describes a homemade GPS receiver.
It is presented in a detailed and elegant manner
On Fri, Sep 26, 2014 at 8:25 AM, Dr. David Kirkby (Kirkby Microwave
Ltd) drkir...@kirkbymicrowave.co.uk wrote:
As I say, without stating the properties of the receiving antenna,
absolute power levels are not a sensible unit.
Indeed, there is an implicit assumption of a ~omnidirectional
he...@pericynthion.org said:
Since the GPS signals come from all parts of the sky this is pretty much
required, unless you're using fancy beam steering techniques.
How hard is the beam steering relative to everything else?
--
These are my opinions. I hate spam.
The simple, cheap and easy what to do this is to get a cheap PC of any
kind. Perhaps a 15 year old notebook PC. Then connect the serial port on
the Thunderbolt to the serial port on the PC. (This is a good reason to
buy a way-old PC notebook because those had real serial ports. Lacking a
it is relative complicated, since you need to look multiple satellites
almost in the same time
73
Alex
On 9/26/2014 5:12 PM, Hal Murray wrote:
he...@pericynthion.org said:
Since the GPS signals come from all parts of the sky this is pretty much
required, unless you're using fancy beam
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