Experimental Log: Roger Bland, January 7, 2002
Look at data for 10 days.
( logbook |2001 data | ifremer on RAFOS |Garfield at NPS )

17.54 Friday January 7, 2002. I have finally gotten a suite of programs working which calculates the RAFOS-detection signal, plots every 2-hour file, and assembles them onto web pages, in the data directory. There are still a lot of improvements to be made. I think that I will look at a few of the detection peaks. We need to define an algorithm for picking them out, and then estimate the time of arrival.

I will start with the run r0129903.19, which has a beautiful high signal over a minimum of noise.
Day0 = 299.1383499701, lblk = 128, npt = 57009. The peak is at 3162.37 sec of the run, or Oct. 27, or 3H19m13.44s+0H52m 42.37 s = 4:11:55.81 Zulu time. The width of the peak is about 1 sec, FWHM.

For comparison, on November 4 the same signal seemed to be arriving at about 4:11:53 . The two certainly seem consistent.

On December 27 I plotted out a nice detection signal. It looks quite a bit like today's signal. However, I did not evaluate the arrival time.

I am too beat to continue today. However, the results are encouraging. Just for fun, an increase of 3 seconds out of a total travel time of 720 sec would correspond to a cooling of about 3 degrees Celsius, over a month's time. It's probably noise.

18:45 Go Home!!!