IOAA 2017, Наблюдения, дневен тур — Задача 4. Exposure time from a Photograph

Observational Examination (Day)

Указания
  1. Do not open the exam envelop yourself.
  2. This part of the exam consists of 7* problems located in separate exam stations.
  3. You have 5 minutes to complete each problem.
  4. After “out of time” is signaled, stop all actions and remain at the same station.
  5. After “next station” is signaled, proceed to the next exam station and hand the exam envelope to the station’s proctor.
  6. Use only blue pen to mark into the answer sheets provided. Any answers written in the answer sheet at the end of timer is considered final and will be graded towards the final score.

* Number of problems will be reduced to 5 if night observation was successful

Условие

Instruction: Estimate an exposure time of a given “Star Trails” image.

Included:

  • A “Star Trails” image that was taken by a still camera capturing image over a period of time.
  • Ruler

Exposure time:

Решение

Внимание: Непълно решение

В архива няма официално решение на тази задача.

Оригинал в Архива: Observation_Day.pdf