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*Subject*: how to convert ALAT/ALON (was Re: [amsat-bb] Squint)*From*: Franklin Antonio <antonio@xxxxxxxxxxxx>*Date*: Mon, 14 May 2001 15:18:40 -0700*In-Reply-To*: <Pine.GSO.3.95.1010514094029.10251C-100000@oso.slonet.org>

At 09:43 AM 5/14/2001, Clifford Buttschardt wrote: >The problem remains-- should we add 180 degrees to this figure and change >the signal of ALAT for Instantrack? Still not clear on this. Yes. Change the sign of ALAT, and add 180 degrees to ALON. To see this, take a globe (a model of the earth, with latitude and longitude printed on it), and look at what happens when you go from one point on the globe to the point exactly opposite. You change the sign of latitude, and add 180 degrees to longitude. On AO40, the published ALAT & ALON refer to the orientation of the motor, but the antennas (what you're likely interested in) are on the opposite side. In some email, some people have said you should subtract (rather than add) 180 degrees to ALON. Of course, adding 180 accomplishes exactly the same thing as subtracting 180, so don't let this confuse you. Feel free to subtract if that suits you. If someone gives you an ALON of 179, you can enter either -1 or +359 . IT will accept ALON in the range -359 to +359, so you might have to add or subtract 360 after you add 180 to put it back in the right range. I know you can all handle that. If someone gives you a starting ALON of 180, you know the point exactly opposite has an ALON of 0 . ---- Via the amsat-bb mailing list at AMSAT.ORG courtesy of AMSAT-NA. To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org

**Follow-Ups**:**Re: how to convert ALAT/ALON (was Re: Squint)***From:*Vince R.

**Re: how to convert ALAT/ALON (was Re: Squint)***From:*Paul Williamson

**References**:**Squint***From:*Estes Wayne-W10191

**Re: Squint***From:*Clifford Buttschardt

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