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-----Original Message-----
From: Chuck Britton [mailto:britton@NCSSM.EDU]
Sent: Monday, October 22, 2001 3:33 PM
To: PHYS-L@lists.nau.edu
Subject: Re: Tide article
Maybe there is a difference of opinion as to what is 'significant'?
If the moon's 12.4 hour effect isn't the ONLY effect, then maybe
someone considers it to be of NO effect?!?!?!?!
At 2:42 PM -0400 on 10/22/01, Robert Cohen wrote
At 12:10 10/22/01 -0400, Chuck Britton wrote:understanding
It sounds to me like someone's students need to be turned loose with
a FFT program and LOTS of this gathered experimental data!
I thought "someone's students" already have. See below.
On Sunday, October 21, 2001 7:15 PM, Jim Green wrote:
John, I will not "debate" you re this -- I have stated my
down the roadfrom study and research -- well my student's research --
fromMoon or Sun
John Denker.
[snip]
Both our results and NOAA's calculations showed no
correlation of high
water or Spring Tide to anything: Moon or Sun position,
NOAA siteperiod, etc etc. for any location (except for amphidromic points)
I quickly downloaded a year's worth of hourly data from that
and performed a SFT (slow fourier transform - I wrote itmyself) and found
a very significant peak at 12.42 h and smaller ones (butvery clear) at
12.00, 12.66 and 23.93 h. It wasn't until I did the SFTthat I compared
the results to the list below.
M2......12.42hr..Principal Lunar -- The period used by
the NewZeland
site
S2.......12.00.....Principal Solar..........
N2.......12.66.....Lunar Elliptic...........
K2........11.97....Luni-Solar Semi-Diurnal..
K1........23.93....Luni-Solar Diurnal.......
O1........25.82....Principal Lunar Diurnal -- I assume
= John's Mean
Lunar Day
P1.........24.07....Principal Solar Diurnal..
Was I *not* supposed to get these peaks?