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IOTA-VTI

IOTA-VTI. A video time inserter for the times. Occultation timings in the 1600’s. Accurate clocks not available Times recorded by measuring the altitude of a known star at the time of an event Accuracy – several minutes. Occultation timings in the 1700’s & 1800’s.

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IOTA-VTI

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  1. IOTA-VTI A video time inserter for the times

  2. Occultation timings in the 1600’s • Accurate clocks not available • Times recorded by measuring the altitude of a known star at the time of an event • Accuracy – several minutes

  3. Occultation timings in the 1700’s & 1800’s • Accurate pendulum clocks and chronometers in observatories • Clocks set by transit observations • Visual recording of events • Accuracy – around 1 second

  4. Occultation timings in the early 1900’s • Accurate pendulum clocks and chronometers in observatories • Radio transmission of time • Visual recording of events • Accuracy – around 0.1 second, but affected by Personal Equation.

  5. Occultation timings in the mid 1900’s • Atomic clocks • Radio transmission of time – eg WWV • Visual, and some photoelectric, recording of events • Accuracy – around 0.1 second, but affected by Personal Equation.

  6. Occultation timings in the late 1990’s • Atomic clocks • Radio transmission of time – eg WWV • Video recording, but with audio time signal • Accuracy – around 0.1 second, but no Personal Equation.

  7. Occultation timings in the early 2000’s • Atomic clocks • Time from GPS system • Video recording • KIWI system developed to insert the time into the video • Accuracy – around 0.03 second, and no Personal Equation

  8. Occultation timings from 2008 • KIWI system withdrawn • No readily-available commercial alternative • Repairs of existing KIWI’s not always possible.

  9. Occultation timings from 26 May 2011 • IOTA-VTI system becomes available

  10. IOTA-VTI • Developed by Tony Barry of Western Sydney Amateur Astronomy Group (WSAAG), with the assistance of Dave Gault (also of WSAAG) • Manufactured in the US by Walt Morgan (VideoTimers) with the assistance of Sandy Bumgarner.

  11. IOTA-VTI To ensure continued availability at minimal cost: • Exclusive perpetual royalty-free licence to IOTA (US) • IOTA (US) has granted a 5-year exclusive sub-licence to VideoTimers for the manufacture and sale

  12. On behalf of Tony Barry, Dave Gault, Walt Morgan, and Sandy Bumgarner, we proudly ‘launch’ the IOTA-VTI : the next generation of video time inserter for occultation observations.

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