Does anyone know how many satellites are required for a good GPS lock. I keep losing lock which is causing me to lose the system. K0JSC
For a 2D fix you need a minimum of 3 satellites For a 3D fix you need a minimum of 4 satellites Beyond this "more is better". HTH Mike G8TIC On 01/05/2015 20:41, Jeff Carrier wrote:
Does anyone know how many satellites are required for a good GPS lock. I keep losing lock which is causing me to lose the system.
K0JSC
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Ok i've had pretty wide variation of replies. When I see GPS drop and restore on the console it always indicates 10 satellites in view. I'm assuming the RTCM is looking for 10. On Fri, May 1, 2015 at 3:06 PM, Mike Tubby <mike@tubby.org> wrote:
For a 2D fix you need a minimum of 3 satellites For a 3D fix you need a minimum of 4 satellites
Beyond this "more is better".
HTH
Mike G8TIC
On 01/05/2015 20:41, Jeff Carrier wrote:
Does anyone know how many satellites are required for a good GPS lock. I keep losing lock which is causing me to lose the system.
K0JSC
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the rtcm is not 'looking' per se, for 10 satellites, but has detected that there are x-number of satellites in view at the present time. I don't believe that the rtcm has the ephemeres in its' limited memory in the box, but mat be caching those it has seen on a FIFO basis. someone with more insight may be able to clarify. -- Bryan Sent from my iPhone 5...No electrons were harmed in the sending of this message.
On May 1, 2015, at 18:39, Jeff Carrier <k0jsc.jeff@gmail.com> wrote:
Ok i've had pretty wide variation of replies. When I see GPS drop and restore on the console it always indicates 10 satellites in view. I'm assuming the RTCM is looking for 10.
On Fri, May 1, 2015 at 3:06 PM, Mike Tubby <mike@tubby.org> wrote:
For a 2D fix you need a minimum of 3 satellites For a 3D fix you need a minimum of 4 satellites
Beyond this "more is better".
HTH
Mike G8TIC
On 01/05/2015 20:41, Jeff Carrier wrote: Does anyone know how many satellites are required for a good GPS lock. I keep losing lock which is causing me to lose the system.
K0JSC
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I don't think that you said, but I will assume that you are using the Garmin GPS and that you have it located where it has a clear view of the sky and that you have it cabled correctly and with the correct settings, up to date firmware in the RTCM, etc... Most likely IMHO, you have a network problem on your Ethernet or your network between your RTCM and your computer. I have found that if there are lots of errors, collisions, re-transmissions and the such on the network, the RTCM just looses track of the GPS. Fix the network problem and the GPS will mysteriously start working great. Chuck Henderson, CCIE2285, WB9UUS On Fri, May 1, 2015 at 5:39 PM, Jeff Carrier <k0jsc.jeff@gmail.com> wrote:
Ok i've had pretty wide variation of replies. When I see GPS drop and restore on the console it always indicates 10 satellites in view. I'm assuming the RTCM is looking for 10.
On Fri, May 1, 2015 at 3:06 PM, Mike Tubby <mike@tubby.org> wrote:
For a 2D fix you need a minimum of 3 satellites For a 3D fix you need a minimum of 4 satellites
Beyond this "more is better".
HTH
Mike G8TIC
On 01/05/2015 20:41, Jeff Carrier wrote:
Does anyone know how many satellites are required for a good GPS lock. I keep losing lock which is causing me to lose the system.
K0JSC
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Hi Chuck, The network is solid from what I can tell. See the smokeping graph attached. This is the uW shot between the 2 sites. On Fri, May 1, 2015 at 5:18 PM, Chuck Henderson < rpt2@chuck.midlandsnetworking.com> wrote:
I don't think that you said, but I will assume that you are using the Garmin GPS and that you have it located where it has a clear view of the sky and that you have it cabled correctly and with the correct settings, up to date firmware in the RTCM, etc... Most likely IMHO, you have a network problem on your Ethernet or your network between your RTCM and your computer. I have found that if there are lots of errors, collisions, re-transmissions and the such on the network, the RTCM just looses track of the GPS. Fix the network problem and the GPS will mysteriously start working great. Chuck Henderson, CCIE2285, WB9UUS
On Fri, May 1, 2015 at 5:39 PM, Jeff Carrier <k0jsc.jeff@gmail.com> wrote:
Ok i've had pretty wide variation of replies. When I see GPS drop and restore on the console it always indicates 10 satellites in view. I'm assuming the RTCM is looking for 10.
On Fri, May 1, 2015 at 3:06 PM, Mike Tubby <mike@tubby.org> wrote:
For a 2D fix you need a minimum of 3 satellites For a 3D fix you need a minimum of 4 satellites
Beyond this "more is better".
HTH
Mike G8TIC
On 01/05/2015 20:41, Jeff Carrier wrote:
Does anyone know how many satellites are required for a good GPS lock. I keep losing lock which is causing me to lose the system.
K0JSC
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participants (4)
-
Bryan D. Boyle -
Chuck Henderson -
Jeff Carrier -
Mike Tubby