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Obtenida la altura verdadera del sol y con la misma hora civil de Greenwich= 1350, situación estimada de 23º 27,2’S - 041º 27,2'W, ángulo en el Polo = 15º 41,5’E y declinación del Sol = +00º 39,3’, calcula la altura estimada del Sol, utilizando las fórmulas que resuelven los lados y ángulos del triángulo de posición.Having obtained the Sun’s true altitude, with the same Greenwich civil time = 1350, DR position 23º 27.2′S - 041º 27.2′W, meridian angle = 15º 41.5′E and Sun’s declination = +00º 39.3′, work out the Sun’s computed altitude, using the formulas that solve the sides and angles of the position triangle.
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Correct answer: d) 61º 28.3′
Why it is correct
sin a = sin l sin d + cos l cos d cos P. South latitude and north declination: the first term subtracts. sin a = −0.00455 + 0.88310 = 0.87855, so a = 61º 28.3′.
Why the others are not
- a) The formula does not give this value.
- b) The formula does not give this value.
- c) The formula does not give this value.
How to work it out in the exam
- Latitude and declination of opposite name: opposite signs.
Where this question comes from
- Región de Murcia · 2019 · 1ª convocatoria · CY Tipo 1 · question 19 Official paper · Official answer key
Pending instructor review. Machine translation, not reviewed.