The Museum of HP Calculators

HP Forum Archive 14

[ Return to Index | Top of Index ]

(deleted post)
Message #1 Posted by deleted on 11 Sept 2004, 2:47 p.m.

This Message was deleted. This empty message preserves the threading when a post with followup(s) is deleted.

      
Re: Plotting Hurricane Ivan
Message #2 Posted by Karl Schneider on 11 Sept 2004, 3:12 p.m.,
in response to message #1 by deleted

Jim --

Plotting Ivan's lat/lon coordinates again(st) time? Sure -- download and print a map of the region, and annotate each plotted location of the eye or center with the date-time-group (DTG).

Seriously, the trajectory of a hurricane over time would be more accurately forecasted using numerical prognostications of the state of the atmosphere, not mathematical extrapolations of past course.

The HP-41C Navigation Pac has some routines that might be useful for your purposes -- dead reckoning, great circle, rhumb line, etc.

-- KS

      
Re: Plotting Hurricane Ivan
Message #3 Posted by Dave Shaffer on 11 Sept 2004, 4:52 p.m.,
in response to message #1 by deleted

Jim,

Plot the lat/lon coordinates for each time point that you have. The result will be the trajectory of the hurricane as a function of time. If you start with a map having lat/lon on it, you can actually see what islands are getting the brunt of Ivan.

Or, you can look at what these guys have:

http://www.intellicast.com/Local/USNationalWide.asp?loc=usa&seg=StormCenter&prodgrp=TrackingCharts&product=HurTrack2&prodnav=none&pid=none

I hope the URL isn't too long for your viewer. If so, then just go to www.intellicast.com (their home page), and the hurricane track is on the right-hand side. If you click that image, you will be taken to the address above.

As Karl points out, the ultimate track of Ivan depends not on mathematical calculations, but on the driving forces that make the weather happen (only somewhat predictable!).

            
(deleted post)
Message #4 Posted by deleted on 11 Sept 2004, 8:53 p.m.,
in response to message #3 by Dave Shaffer

This Message was deleted. This empty message preserves the threading when a post with followup(s) is deleted.

                  
Re: Plotting Hurricane Ivan
Message #5 Posted by Chris W on 12 Sept 2004, 1:15 a.m.,
in response to message #4 by deleted

If nothing else, it should make a good random number generator ;)

Chris W

[ Return to Index | Top of Index ]

Go back to the main exhibit hall