The Oscar locator and how it works was described in much detail in "The Satellite Experimenter's Handbook". This was published by ARRL. You may be able to find a copy around some where. It still has a lot of useful information in it even if the satellites referred to are long gone. I made up several Oscar-Locators in the early 80s and used them a lot. I found them the other day when I was having a shack clean out.
To use them you require an "Equatorial Crossing time and longitude" (EQX). Bob McGwier's (N4HY) Quiktrak program gives these but I haven't checked any modern programs.
I have a set of instructions but they are based on my Southern Hemisphere version so would need to be adapted for use in the Northern Hemisphere.
It would be an interesting exercise to make one for the ISS as an educational tool versus looking up an app on a smart phone.
73, Terry Osborne ZL2BAC
-----Original Message----- From: Les Rayburn Sent: Saturday, February 23, 2019 12:42 PM To: AMSAT BB Subject: [amsat-bb] OSCAR-Locator & Amateur Satellite Report Number 154
Today’s mail brought me a vintage cardboard “OSCAR-Locator” purchased on QRZ.com. Also included was a back issue of the Amateur Satellite Report newsletter, Number 154 from July 27, 1987.
I love collecting items related to the history of amateur satellites. The OSCAR-Locator is really neat—I’m digging through back issues of QST now trying to learn how to actually use it. Don’t think I’ll be giving up SatPC32 anytime soon however.
Remember back even further when hams plotted satellite passes using a string and a globe? Remember watching my elmer, Ron Murray WA4IWN (SK) do that back in the day.
Les Rayburn, N1LF Maylene, AL EM63nf AMSAT #38965, ARRL Life Member, CVHS Life Member, SVHF Member
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