Declination
Altitude
Zenith distance
Co-latitude
A. Declination
f/H sec θ
f sec θ/H
f/H
f/H cos ½θ
The angle between the plane of the negative and the horizontal plane containing perspective axis is the tilt of the photograph
The direction of maximum tilt is defined by the photo principal line
The principal plane is truly vertical plane which contains perspective centre as well as principal point and plumb point
All the above
Refraction correction is zero when the celestial body is in the zenith
Refraction correction is 33' when the celestial body is on the horizon
Refraction correction of celestial bodies depends upon their altitudes
All the above
Mean sun
First point of Aries
First point of Libra
The polar star
Standard meridian
Greenwich meridian
Equator
180° longitude
The measured stereoscopic base of photographs is obtained by dividing the air base in metres by the mean scale of the photograph
The difference between the absolute parallax of two points depends upon the difference in their elevations
The line joining the principal point of a photograph and the transferred principal point of the adjoining photograph, is called stereoscopic base
All the above
1 minute of latitude
1 minute of longitude
1 degree of latitude
1 degree of longitude
The vertical plane containing the zenith, the station of observation and the celestial pole is the observer's meridian plane
The angle between the direction of star in vertical plane and the direction of the star in horizontal plane is called the altitude of the star
The complement of the altitude of star is called the zenith distance of the star
All the above
Rotate round the North Pole
Rotate round the celestial pole
Remain always above the horizon
Are seldom seen near the pole star
At east elongation
At upper culmination
At west elongation
At lower culmination
The plane passing through the perspective centre of a stereo pair and a ground point, is known as basal plane
Each pair of image points on stereo pair have their own basal plane
Relative orientation means reconstructing the basal plane
All the above
Rational horizon
True horizon
Celestial horizon
All the above
f sin θ
f cos θ
f tan θ
f sec θ
Sidereal time
Apparent solar time
Mean solar time
All the above
Positive for points above datum
Negative for points below datum
Zero for points vertically below the air station
All the above
B = bH/f
B =f/bH
B = b/fH
B = H/bf
Swing
Tilt
Tip
None of these
52 m
62 m
72 m
82 m
0.50 sq km
0.56 sq km
0.60 sq km
0.64 sq km
The standard meridian
The international date line
That of Greenwich
Both (a) and (c) of above
Is a good property
Is a function of tilt
Is not affected by the change of flying height between photographs
Is minimum when θ is 3°
Equator
Celestial equator
Ecliptic
None of these
Greenwich to the place
Equator to the poles
Equator to the nearer pole
None of these
h tan α/S
h tan β/S
h (tan α + tan β)/S
h (tan α - tan β)/S
One less than mean solar days
One more than mean solar days
Equal to mean solar days
None of these
1°
2°
3°
4°
Equator
Horizon
Pole
None of these
Always follow some definite mathematical law
Can be removed by applying corrections to the observed values
Are also known as cumulative errors
All the above
58 cot α
58 tan α
58 sin α
58 cos α
θ = z + δ
θ = δ - z
θ = 180° - (z + δ)
θ = (z + δ) - 180°