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From: rje@cae780.UUCP (Bob Evans)
Newsgroups: net.aviation
Subject: Navigation DataBase
Message-ID: <1361@cae780.UUCP>
Date: Fri, 20-Sep-85 15:51:09 EDT
Article-I.D.: cae780.1361
Posted: Fri Sep 20 15:51:09 1985
Date-Received: Mon, 23-Sep-85 16:17:22 EDT
Distribution: na
Organization: Tektronix, Inc. (CAE Systems Division), Sunnyvale, CA
Lines: 37
Keywords: Great Circle Navigation Airports

I have finished the file containing the non-controlled airports for
California, Oregon, and Nevada. The file is posted to net.sources.

I have examined the source code for the program and have modified it
to produce waypoints that are 90 degrees from the flight path to the VOR.
This makes much better use of the VORs. Alas, the program does not yet
understand that DME is _slant_ range. In order for this to work I will
have to add VOR elevation to the VOR file, and add some more code to the
program. If I'm lucky (meaning my better half doesn't notice how much time
I'm spending at the keyboard) I could have this done in 4 or 5 days ...

I will post the new VOR file and new source to net.sources then.

I have looked at translating this to TurboPascal. Shouldn't be too
hard. If there is any interest I will also post this to net.sources when
I get it done.

BTW, in order for slant range to work, the program will also need altitude
info for each flight leg. I'm adding that to the code as well ... ....
As soon as the code is checked out (against a ProStar) I'll post the sources.

FLASH - the latest AOPA newsletter says that NOS (national ocean survey)
is considering selling
a database of navigation information in machine readable form. Proposed
formats are 5 1/4 floppy, nine track tape and paper (?). 

Maybe it will be cheap enough that we can all afford it !


Bob

FROM:   Robert J. Evans, CAE Systems Division of Tektronix, Inc.
UUCP:   tektronix!teklds!cae780!rje
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