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Subject: Re: Meridional Distances
From: Vic Fraenckel (vfraenc1@XXX.XXX)
Date: Tue Sep 17 2002 - 20:30:24 EDT
Am I missing something in this discussion? (Most likely)
If you know the latitude and longitude of your departure and arrival points
why not just calculate the ellipsoidal azimuth and distance from one to the
other directly?
Vic
________________________________________________________
Victor Fraenckel - The Windman vfraenc1@XXX.XXX
KC2GUI www.windsway.com
Home of the WindReader Electronic Theodolite
Read the WIND
"Victory at all costs, victory in spite of all terror, victory however long
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-Count Oxenstierna (ca 1620)
----- Original Message -----
From: "Chuck Taylor" <ctaylor@XXX.XXX>
To: <NAVIGATION-L@XXX.XXX>
Sent: Tuesday, September 17, 2002 12:20 PM
Subject: Re: Meridional Distances
| >
| > Although I have tables accurate to 2 decimal places for the Meridional
| > Parts, the Meridional Distances come only in whole degrees, so need to
| > be interpelated for in-between values.
|
| Peter,
|
| Bowditch has tables of Meridional Parts to quite a number of decimal
places.
| The method for computing distances using Meridional Parts is called
"Mercator
| Sailing" and is also described in Bowditch.
|
| The introduction to the tables in Bowditch gives a formula for computing
| Meridional Parts. I have programmed this into a calculator. One could
also
| program it into a spreadsheet. If memory serves me correctly (I'm away
from my
| home library) there is a typo in the formula in Bowditch 95, but Bowditch
80/84
| Volume 2 has it right.
|
| Best regards,
|
| Chuck Taylor
| Everett, WA, USA
|
|