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
D. All the above
Sidereal time at any instant is equal to the hour angle of the first point of Aries
Local sidereal time of any place is equal to the right ascension of its meridian
Sidereal time is equal to the right ascension of a star at its upper transit
All the above
sin λ
cos λ
tan λ
cot λ
Positive for points above datum
Negative for points below datum
Zero for points vertically below the air station
All the above
Zenith
Celestial point
Nadir
Pole
4000 m
5000 m
6000 m
7000 m
In truly vertical photographs without relief angles are true at the plumb point
In tilted photographs without relief, angles are true at the iso-centre
In tilled photographs with relief, angles are true at the principal point
None of these
f/H
f/(H + h)
f/(H - h)
(H - h)/f
Parallel to the principal line
Perpendicular to the principal line
Along the bisector of the angle between the principal line and a perpendicular line through principal plane
None of these
Its altitude and azimuth
Its declination and hour angle
Its declination and right ascension
All the above
22° 30'
23° 27'
23° 30'
24° 0'
1°
2°
3°
4°
Correction for refraction is always negative
Correction for parallax is always positive
Correction for semi-diameter is always negative
Correction for dip is always negative
First point of Aeries
First point of Libra
Vernal Equinox
Both (b) and (d) of the above
Focal length of the camera
Overall size of the photo graphs
Percentage of overlap
All the above
Mean sun
True sun
Vernal equinox
All the above
Swing
Tilt
Tip
None of these
Latitudes north of the equator are taken as positive
Latitudes south of the equator are taken as negative
Longitudes east of Greenwich are taken as negative
Longitudes west of Greenwich are taken as positive
At culmination
At elongation
Neither at culmination nor at elongation
Either at culmination or at elongation
At culmination
At elongation
Neither at culmination nor at elongation
Either at culmination or at elongation
Ursa Minor's remains always north of pole star
Polar star remains always north of Polaris
Polaris remains always north of Ursa Minor's
Ursa Minor's pole star and Polaris are the names of the same star
Optical projection
Optical mechanism projection
Mechanical projection
All the above
The length of the air base is increased
The scale of the model is altered
y-parallax is not affected
All the above
θ = z + δ
θ = δ - z
θ = 180° - (z + δ)
θ = (z + δ) - 180°
1000 km
800 km
600 km
500 km
24 %
36 %
40 %
60 %
365
365.2224
365.2422
366.2422
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
By subtracting their longitudes if places are in the same hemisphere
By adding their longitudes if places are in the different hemispheres
By subtracting the sum of their longitudes exceeding 180° from 360° if places are in different hemispheres
All the above
Equator
Horizon
Pole
None of these
Tension = (P - Ps)L/AE
Sag = L3w²/24P² where w is the weight of tape/m
Slope = (h²/2L) + (h4/8L3) where h is height difference of end supports
All the above