All these measures were taken with a carrier >> frequency at 3 GHz, but if I change the fc at 1 GHz the shape is worst, >> e.g.

/rx_samples_to_file --args="fpga=usrp1_fpga_4rx.rbf, subdev=DBSRX" --freq "$FC" --rate="$SR" $FILE --nsamps "$NSAMPLES" and here is its output: Creating the usrp device with: fpga=usrp1_fpga_4rx.rbf, subdev=DBSRX... -- Loading firmware image: /usr/share/uhd/images/usrp1_fw.ihx... done -- Opening a USRP1 device... -- Loading FPGA image: /usr/share/uhd/images

. > > All oscillators had aging below 5X10-10/day. > > As you can see the short term stability of the -60111 > compares favorably with the 10811A. > > I'll be making some measurements on the -60158 variants and > some motorola units soon. > > Cheers! > Corby Dawson > > > QUARTZ 1 SEC. 10 SEC. 100 SEC. 1K SEC.

There are dozens of technical papers about all this in the PTTI, FCS, UFFC, EFTF journals. Google for words like: GPS carrier-phase dual-frequency time-transfer geodetic-receiver IGS precise point positioning PPP I don't have a link to a handy 1-page summary, but someone else on the list might.

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So anyone wishing to visit must call ahead. Leave a message if you have to. Mr. Jurmain is quite happy to have birders but please use your discretion as Mr. Jurmain works from his home during the weekdays. Mr. Jurmain suggests that the weekend is the best time to visit and there are no visits allowed if he is not home.

Let's see how we did in week 10 and let's all "Gator Done" this week to get us back towards triple digits! Each Monday we'll post a "Roll Call" where you can comment back about your results for the week, in this case Week 10 that ran from Monday 12/7 through Sunday 12/13...

Serious question. john k6iql -----Original Message----- From: time-nuts-request To: time-nuts Sent: Wed, Jan 2, 2013 9:19 pm Subject: time-nuts Digest, Vol 102, Issue 10 Send time-nuts mailing list submissions to time-nuts@febo.com To subscribe or unsubscribe via the World Wide Web, visit https://www.febo.com

Just got back from visiting to the Toronto Islands with Margaret Liubavicius and Ian Cannell and a very productive but windy visit it was and following are some of the birds we found on and over The Islands.

If anyone is planning on visiting The Islands this weekend then remember this is a holiday weekend and it will be crowded over there, especially Centre Island.