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Re: [Discuss-gnuradio] Waiting too much time for the GPS to be synchroni

From: Marcus D. Leech
Subject: Re: [Discuss-gnuradio] Waiting too much time for the GPS to be synchronized
Date: Mon, 24 Sep 2012 07:26:11 -0400
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv: Gecko/20111108 Fedora/3.1.16-1.fc14 Thunderbird/3.1.16

I think you need to put the antenna outside.

In my situation, I put the antenna on the balcony.

It usually takes me only several minutes to get an accurate time (diff<0.000001).




From: address@hidden [mailto:address@hidden] On Behalf Of Alex Zhang
Sent: Monday, September 24, 2012 2:51 PM
To: gnuradio mailing list; usrp-users
Cc: Tom Rondeau; address@hidden
Subject: [Discuss-gnuradio] Waiting too much time for the GPS to be synchronized




I have two USRPs with GPS equipped. I found it always took too much for the two GPS to be sychronized to the same time (diff < 0.00001s). 

Previously, I wait about 1 or 2 hours, but today 10 hours later, they still have time difference of 5s.


I am using GPS indoor  environment. 




Dreams can come true – just believe.


_______________________________________________ Discuss-gnuradio mailing list address@hidden https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
If you're in a situation (indoors) where you can't get GPS on your SmartPhone, you're not going to get it on the GPSDO.  The GPS L1 signal
  isn't very strong, and doesn't propagate very well through concrete walls and low-E windows.  You really want an outdoor antenna.

Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium

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