1-49.
The correction for parallax, which
must be made for precise computa-
tions, accounts for the
1.
refraction of the rays
of the sun
2.
gravitational differential
created by the direction
of the plumb line
3.
displacement of the horizon
plane
4.
elliptical variation of the
surface of the earth
1-50.
The side of the astronomical
triangle between the pole and
the star is known as the
1.
colatitude
2.
coaltitude
3.
parallactic
4.
codeclination
Learning Objective: Determine the
celestial coordinate when given
meridian altitude observation.
IN ANSWERING QUESTIONS 1-51 AND 1-52,
REFER TO TABLES 15-1 AND 15-2 IN YOUR
TEXTBOOK.
1-51.
What was the GHA of the sun at zone
1-52
1-53
1-54
time 09h22m14s on 16 May 1986 in
longitude 79°37’12"W?
1.
293°51.9´
2.
97°47.6´
3.
94°51.2´
4.
36°28.7´
What was the declination of the sun
at the time and place in question
1-51?
1.
S 8°59.2’
2.
N 19°07.1’
3.
N 19°07.9’
4.
N 19°08.1’
What is the polar distance,
measured from the elevated north
pole of the celestial body whose
declination is 20°S?
1.
20°
2.
70°
3.
110°
4.
200°
In a time diagram, the observer
is located at what point?
1.
Over the north celestial pole
2.
On the celestial equator
3.
On the Greenwich meridian
4.
Over the south celestial pole
1-55.
The GHA of a star is measured in
what manner?
1.
Counterclockwise from Greenwich
to the star only
2.
Clockwise from Greenwich to the
star only
3.
The same direction from
Greenwich to the star
4.
The same direction from the
star to Greenwich
1-56.
LHA is always measured from the
local meridian in what direction?
1.
Northward
2.
Southward
3.
Eastward
4.
Westward
1-57.
What method is used to obtain the
1-58
1-59
LHA when the GHA and longitude are
known?
1.
Always add the longitude to
the GHA
2.
Always subtract the longitude
from the GHA
3.
Subtract an eastern longitude
from the GHA and add a western
longitude to the GHA
4.
Add an eastern longitude to
the GHA and subtract a western
longitude from the GHA
What is the polar distance of a
heavenly body?
1.
The declination at that instant
2.
90° minus the declination
3.
180° minus the declination
4.
270° minus the declination
The difference between the surface-
plane altitude value and the
center-of-the-earth-plane altitude
value is what type of correction?
1.
Semidiameter
2.
Refraction
3.
Parallax
4.
Upper limb
Learning Objective: Identify
methods, procedures, and
calculations required to determine
latitude and azimuth.
5
