[time-nuts] Survey plot as art.

Gary E. Miller gem at rellim.com
Mon Jan 9 15:23:34 EST 2017

Yo Björn!

On Mon, 9 Jan 2017 07:45:00 +0100
"Björn Gabrielsson" <bg at lysator.liu.se> wrote:

> >> My gut reaction is that "coupling" between the two antennas may
> >> have some effect on some of the variation.  
> For high accuracy applications, I have been given the advice to keep
> GPS antenna separation much higher. 1 meter separation was suggested.

Clearly the Adafruit is not high accuracy.  I have played with some
short baseline DGPS (cm level data) and not found any issue with antenna

> For comparing GPS receiver behavior its a cleaner setup to use a GPS
> signal splitter (or basic RF splitter with suitable DC-blocks).

Care to recommend any that have SMA connectors?  I have found that
a 3dB difference in antenna can degrade my data quality, it would be
interesting to see how the 3dB loss of the splitter affects thins.

Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
	gem at rellim.com  Tel:+1 541 382 8588

	    Veritas liberabit vos. -- Quid est veritas?
    "If you can’t measure it, you can’t improve it." - Lord Kelvin
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