BBS: Inland Empire Archive Date: 12-18-92 (00:24) Number: 390 From: JIM VAN NULAND Refer#: NONE To: SEAN PAGE Recvd: NO Subj: Re: Mathematics Code Conf: (2) Quik_Bas

>Using the descriptions given above, calulate the >range between ships. The distance is the square root of the sum of squares of differences in each co-ordinate. That is: dist = sqr((x2-x1)^2 + (y2-y1)^2 + (z2-z1)^2) Now, for the azimuth and elevation, these are similar to the computation of the position of a planet -- the conversion from rectangular co-ordinates into (geocentric) longitude and latitude. Unhappily I'm nearly out of time and don't know them offhand enough to quickly type them in. If you find them in an astro or math book, be very careful in the arc- cosine, the one that will give you the azimuth, as it's troublesome to obtain the correct quadrant. --- ConfMail V3.3 * Origin: The PC-TIE --- San Jose, CA (1:143/11)

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