TDOP

[Gary E. Miller]

Yo All!

For fun.  I just ran a 24 scatter plot on an Uputronis V2 GPS HAT.

The Uputronics has a uBlox 8.  See attached.  

During that time, the Uputronics reported seeing 4 to 20 sats and a TDOP
from 0.42 to 32.6 and a mean of 0.786 and a SD of 0.668.

To bring this back to NTP, when the TDOP hit 32.6 I can see a 2 micro
Second spike in NTP jitter.  So for that small period in time my
Raspberry Pi clock was more stable than my PPS.

RGDS
GARY
---------------------------------------------------------------------------
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
-------------- next part --------------
A non-text attachment was scrubbed...
Name: upuv2.png
Type: image/png
Size: 19623 bytes
Desc: not available
URL: <https://lists.ntpsec.org/pipermail/devel/attachments/20170108/8a502e40/attachment.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 455 bytes
Desc: OpenPGP digital signature
URL: <https://lists.ntpsec.org/pipermail/devel/attachments/20170108/8a502e40/attachment.bin>