GPSABC a device designed to support the visual

GPS-ABC a device designed to support the visual observer by Tony Barry and Dave Gault Presented to International Occultation Timing Association 2012 AGM Friday, 19 th October 2012 (US) Saturday, 20 th October 2012 (AU)

Remember the The-Good-Old-Days… When visual observations were King. All an observer would need were… n A simple telescope n A shortwave radio (or two) tuned to WWV, WWVH, CHU, or in Australia, VNG time broadcast n A cassette tape recorder (or two) And a loud voice to make call from the telescope when the event(s) occurred. Thousands of historical observations were made using this method… Observer Hal Povenmire

… And still are. The Great (90) Antiope Occultation 2011, July 19 th

Now video observations are King… Some blokes have huge visual scopes and don’t want to climb the video learning curve They can make valid observations if good time-base is available…

time-bases for visual observations Closed in 2002 enter… GPS-ABC

The coded beep of GPS-ABC has a clear and static free coded time-beep n n n every second beginning of the minute 10 th, 20 th, 30 th, 40 th and 50 th seconds 55 th, 56 th. 57 th and 58 th second 59 th second = normal beep = long beep = short beep = brief beep = silent (no beep) Click to hear GPS-ABC and John Vetter in action Or goto You. Tube - http: //www. youtube. com/watch? v=32 NYYs_9 AS 8

GPS-ABC built on the IOTA-VTI pedigree IOTA-VTI P#4 GPS-ABC P#5

How to procure a GPS-ABC?

GPS-ABC an open-source device

The cheapest method to procure a Hand Wired GPS-ABC is the hand-wired option Home Assembly with or without Hardware Help because you do all the purchasing and work. § § About $113 worth of components and about 6 to 8 hours work. Hardware Help… Metal Chassis $12. 50 Modified Case to suit $35. 00

GPS-ABC #8 by Chris Chad

Printed Circuit Board Home Assembly or Ready-to-Go n n Option 2 a; Home Assembly - owner purchases the three major components and a KIT-of-Parts - about an hours work with basic tools and a soldering iron… ……… Cost about $199 Option 2 B; Purchased Fully Assembled, Tested, and Ready-to-Go ……………. . Price $249

Questions…? For more info, see http: //www. kuriwaobservatory. com