ssPageName=ADME:SS:SS:US:3160 >> >> >> LOT 1130 >> Seller's Estimate: USD 600.0 - 800.0 >> DIPLEIDOSCOPE - England, 19th century, brass and bronze. Brass and glass prism mechanism inset into a shaped bronze case with scrolled sides. Engraved "Dent's Patent Meridian Instrument" and "67 Strand, London". 3"h. 2.25"w. 3"d. Pricey, you say?

The newer counters (I would toss the CNT-90 into the batch) have various tricks in them to improve frequency estimation. The older stuff simply did not have the horsepower to do some of this. Time wise some of the older counters did pretty well. So, is a 53132 worth more than a 5335? Sure it is. Is a 53230 worth more than a 53132? Yes.

They all work and all have tolerance estimates on them. On a global basis you need to trace back to UTC and BIH. It’s the same idea only one level higher. Bob > On Feb 10, 2017, at 3:47 PM, Burt I.

Actually you can do better given the excess computer power you have: You can output a frequency estimate after the first send and then each second you can output a more accurate value until finally after 4,000 seconds out have 0.001 Hz.

Of those, the majority 3,721 resulted in the 10811 being tossed in the garbage as “another junker”……(yes, those are estimates, but I’d bet they are close based on the number of 10811’s made and how flakey those fuses are). Bob > On May 11, 2017, at 7:04 PM, Donald E.

It lets you better estimate cycle slips and other odd occurrences. Bob > On Jun 17, 2017, at 1:55 AM, Lifespeed wrote: > > Not too surprising to read locking two crystal oscillators together without using a physical cable is difficult to impossible.

My guess is that it's because I'm in Australia and CSRS don't have as much data as they do in North America for estimating ionosphere. There is a dense local CORS network but access is not free. The other thing I tried was using the receivers in base-rover configuration with various CORS stations out to 100 km and this worked very well.

In theory (though I can in no way prove it yet) you should be able to reduce the timing errors associated with the broadcast clock and orbit estimates by about an order of magnitude. It is *abundantly* unclear what that translates into in nanoseconds due to a whole lot of layers everything goes through…..

If we estimate that section as 2 minutes, one cycle over 120s is 0.8 ppb and is about the most extreme excursion experienced on this GPSDO, and typical of other observations using higher frequencies.

The 5371A and 5372A actually can do linear regression processing for frequency estimation, a historic note that predates this capability of the Philips/Fluke/Pendulum counters to the best of my knowledge. PS. I also have a 5370C, which is a flat-bed scanner from HP. Cheers, Magnus On 2020-10-22 15:33, Tom Van Baak wrote: > Avoid the 53181A; too limited.