up" (e.g. at a Declination that is the same at Waterloo's latitude to object is directly overhead at Elevation of 90 degrees, but at all or any Azimuth... Azimuth is poorly defined for such objects at that time). Use this plot to answer the following questions: (a) On June 21 the Sun is at a Declination of 23.5 degrees. Estimate the time of sunrise in Waterloo (e.g. how many hours before noon the Sun at Elevation = 0. (b) How long is the day in Waterloo on June 21? (c) What is the time of sunrise on September 21 when the Declination of the sun is 0? (d) On Dec 21 the Sun is at a Declination of -23.5 degrees. Estimate the time of sunrise on that date and the length of the day. 2) The figure below shows the positions of objects in the sky as seen from Waterloo in "natural" coordinates of Azimuth (0 degrees is to the North, 90 degrees is East, 180 degrees is South) and Elevation (0 degrees is the horizon and 90 degrees is directly overhead). This is just half of the sky but the other half (from Azimuth of 180 to 360 is a perfect mirror reflection of this). Note that Elevation of 0 is the position where an object rises above the horizon (the Elevation of 0 on the reflected figure shows the position at setting). Azimuth and Elevation from UWaterloo 50 deg 80 60 deg 60 60 Elevation 8 70 deg 20 1 -1 hr -2 hr 1 -3 hr 1 -4 hr -5 hr 1 1 -6 hr -7 hr -8 hr -9 hr 50 100 Azimuth 40 deg 30 deg 20 deg 、 . 10 deg IC 0 deg 10 deg -20 deg 150 The blue lines show the Declinations of the objects and the red lines mark the time in hours, where 0 hours is "noon" for object, or the time (in Sidereal Time) where the object is at its highest Elevation - note that 0 hours is not marked as the plot "blows

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up" (e.g. at a Declination that is the same at Waterloo's latitude to object is directly
overhead at Elevation of 90 degrees, but at all or any Azimuth... Azimuth is poorly
defined for such objects at that time). Use this plot to answer the following
questions:
(a) On June 21 the Sun is at a Declination of 23.5 degrees. Estimate the time of
sunrise in Waterloo (e.g. how many hours before noon the Sun at Elevation = 0. (b)
How long is the day in Waterloo on June 21?
(c) What is the time of sunrise on September 21 when the Declination of the sun is
0?
(d) On Dec 21 the Sun is at a Declination of -23.5 degrees. Estimate the time of
sunrise on that date and the length of the day.
Transcribed Image Text:up" (e.g. at a Declination that is the same at Waterloo's latitude to object is directly overhead at Elevation of 90 degrees, but at all or any Azimuth... Azimuth is poorly defined for such objects at that time). Use this plot to answer the following questions: (a) On June 21 the Sun is at a Declination of 23.5 degrees. Estimate the time of sunrise in Waterloo (e.g. how many hours before noon the Sun at Elevation = 0. (b) How long is the day in Waterloo on June 21? (c) What is the time of sunrise on September 21 when the Declination of the sun is 0? (d) On Dec 21 the Sun is at a Declination of -23.5 degrees. Estimate the time of sunrise on that date and the length of the day.
2) The figure below shows the positions of objects in the sky as seen from Waterloo
in "natural" coordinates of Azimuth (0 degrees is to the North, 90 degrees is East, 180
degrees is South) and Elevation (0 degrees is the horizon and 90 degrees is directly
overhead). This is just half of the sky but the other half (from Azimuth of 180 to 360
is a perfect mirror reflection of this). Note that Elevation of 0 is the position where an
object rises above the horizon (the Elevation of 0 on the reflected figure shows the
position at setting).
Azimuth and Elevation from UWaterloo
50 deg
80
60 deg
60
60
Elevation
8
70 deg
20
1
-1 hr
-2 hr
1
-3 hr
1
-4 hr
-5 hr
1
1
-6 hr
-7 hr
-8 hr
-9 hr
50
100
Azimuth
40 deg
30 deg
20 deg
、
.
10 deg
IC
0 deg
10 deg
-20 deg
150
The blue lines show the Declinations of the objects and the red lines mark the time
in hours, where 0 hours is "noon" for object, or the time (in Sidereal Time) where the
object is at its highest Elevation - note that 0 hours is not marked as the plot "blows
Transcribed Image Text:2) The figure below shows the positions of objects in the sky as seen from Waterloo in "natural" coordinates of Azimuth (0 degrees is to the North, 90 degrees is East, 180 degrees is South) and Elevation (0 degrees is the horizon and 90 degrees is directly overhead). This is just half of the sky but the other half (from Azimuth of 180 to 360 is a perfect mirror reflection of this). Note that Elevation of 0 is the position where an object rises above the horizon (the Elevation of 0 on the reflected figure shows the position at setting). Azimuth and Elevation from UWaterloo 50 deg 80 60 deg 60 60 Elevation 8 70 deg 20 1 -1 hr -2 hr 1 -3 hr 1 -4 hr -5 hr 1 1 -6 hr -7 hr -8 hr -9 hr 50 100 Azimuth 40 deg 30 deg 20 deg 、 . 10 deg IC 0 deg 10 deg -20 deg 150 The blue lines show the Declinations of the objects and the red lines mark the time in hours, where 0 hours is "noon" for object, or the time (in Sidereal Time) where the object is at its highest Elevation - note that 0 hours is not marked as the plot "blows
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