[time-nuts] Improving the stability of crystal oscillators

[Bruce Griffiths]

Brooke Clarke wrote:
> Hi Bruce:
>
> Details on your experiment please.
> Hole/pipe diameter, material?
> Depth?
> Delta T at different depths vs surface ambient?
> Soil type?
>
>
> Have Fun,
>
> Brooke Clarke
>   
Brooke

Unable as yet to find my data, it was published in some very obscure
publication if I remember correctly.
However there was extensive series of records kept in England from the
time of Lord Kelvin.

More recent data is available from the US forest service among others:
http://ncrs.fs.fed.us/pubs/rn/rn_nc032.pdf
Above is for Wisconsin, not directly applicable to California.
http://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?letter=.&classic=YES&bibcode=1952AuSRA...5..303W&page=&type=SCREEN_VIEW&data_type=PDF_HIGH&send=GET&filetype=.pdf
<http://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?letter=.&classic=YES&bibcode=1952AuSRA...5..303W&page=&type=SCREEN_VIEW&data_type=PDF_HIGH&send=GET&filetype=.pdf>
Above paper by CSIRO is for an Australian site.
Analysis is fairly comprehensive.

http://www.mmm.ucar.edu/mm5/lsm/soil.pdf

http://www.ias.ac.in/epsci/mar2002/Esb1439.pdf

Bruce