The satellite constellation uses 24 satellites PLUS how many operational spares?

Select the most correct answer

The user segment:

If 4 satellites are in view:

GNSS navigation works on the principle of:

Ephemeris Data is:

Almanac data is:

GPS satellite signals are:

The datum used for GPS and instrument approaches is:

A RAIM prediction must be performed?

Is it preferable to have a high or low PDOP?

If a receiver's clock is fast (clock error) it will make the receiver think the satellite is FURTHER away than it actually is, this clock error is minimised by:

GBAS, WAAS and DGPS all use:

An RNAV route is designated RNAV2, how far either side of track must you remain at least 95% of the time?

Global coverage for each system is generally achieved by a satellite constellation of 18–30 satellites at .........................

How many GPS Satellites are currently in orbit around the earth?

How close to your actual position can a GPS receiver measure?

The three segments of the GPS system are the space segment, the user segment, and the .............. segment.

What are the clocks called that are used by GPS satellites to very accurately keep time?

How many measurements (minimum) must be made to give us an accurate estimation trilateration of our position on the earth?

The purpose of the ................ segment is to Monitor, Predict, Calibrate and Update transmissions from satellites

How long does it take a GPS satellite to orbit the earth?

When using GNSS an aircraft on an air transport operation must have:

When nominating an alternate, the alternate aerodrome must have:

What is the definition of surveying?

_______________________ surveying the discipline of land surveying that relates to the laws of land ownership and the definition of property boundaries

__________________________ surveys are concerned with measurement and mapping of the physical features of the earth.These features are all natural and manmade features.

What are the functions of surveying ?

How many acres are in a field that measures 5280ft x 1320ft?

A closed contour line with one or more higher contour

lines inside represents

Theodilite is a measuring device which is included

under category of

A tape is standardized at 100N pull. If the load applied

is 120N the sag correction

The long and short sides of a rectangle measure

9.32 m and 4.82 m, with errors ± 5 mm. Express the

area of correct number of significant figures

An offset is laid out 3° from its true direction of the

field. If the scale of plotting is 10 m to 1 cm, find the

maximum length of offset so that the displacement of

the point on paper may not exceed 0.25mm

The combined correction of curvature and refraction

for distance of 1.29 km is

The observation ray between two triangulation stations

A and B just grazes the sea. If the heights of A and B are

6000 m and 2000 m respectively, the distance AB is

(Let radius of earth R = 6440 km)

The constant for an instrument is 750, the value of

C = 0.3 m and intercept S = 2 m. The distance from

instrument to the staff when the micrometer readings

are 4.326 and 4.283 and the line of sight is at +8° 361

when the staff was held vertical is

The volume of 130 m long road of formation width

10 m, side slopes 1 : 1, average depth of cutting along

center of line is 5m and slopes of ground in cross-section is 10 to 1 is

In a region with magnetic declination of 4°E, the magnetic

fore bearing (FB) of a line AB was measured as N

82° 501 E. There was a local attraction at A. To determine

the correct magnetic bearing of the line, a point O

was selected at which there was no local attraction. The

magnetic FB of line AO and OA were observed to be

S 42° 401 E and N 48° 201 W respectively. What is the

true FB of line AB?

The length of the tape is 30 m and the sag is 30.35 cm

at the mid span under a tension of 100 N, the weight of

the tape is

Two distances of 30 and 100 meters were accurately

measured out and the intercepts on the staff between the

outer stadia webs were 0.176 m at the former distance

and 0.892 m at the latter. The tacheometric constant K IS

A flag staff of 2 m height was erected on topic of hill

(Q) and the observations were made from two stations

P and R, 50 meters apart. The horizontal angle measured

at P between R and top of flag staff was 50° 30’

and that measured at R between the top of the flag-staff

P was 50° 18’. Angle of elevation to top of staff was

measured to be 10° 121 at P. The angle of elevation

to top of flag staff and was measured to be 10° 48’ at

R. Staff readings on B.M when the instrument was at

P = 1.826 m and that with the instrument at R = 2.285

m. The elevation of the top of hill Q if the BM was

485.065 m is

Match the following

Match the following

(i) Optical square is better than prism square.

(ii) In both optical and prism squares, the principle of

operation is same.

A Circular curve has 300 m radius and 55° deflection

angle, then the apex distance is

The length of mid ordinate in the above question is

Find the area between line AB and the stream taken at a

regular interval of 30 m along line AB, using simpson’s

rule.

The correction for collimation is

Correction for refraction is

The following observations were taken during testing

of a dumpy level s

If A and B are 100 m apart the angle of inclination of

line of collimation is

The distance between two points A and B by tachometer

fitted with anallactic lens which made a vertical angle

of +10° 46’ and staff intercept of 1.763 m. Later on the

constants of instrument were changed to 100 and 0.5.

The percentage error is computed horizontal distance is

In a quadrilateral ABCD, the coordinates of points

are as follows

the area of figure is

After surveying an area with plane table at a station it

was detected that the centering of the instrument was

not done accurately. The displacement of the plotted

point at right angles to the ray was 20 cm. The scale

used was 1 cm = 20 m. Determine the error in the plotted

position of the point (in cm)

To continue a survey line AB past an obstacle, a 400

m long line BC was set out perpendicular to AB and

from C angles BCD and BCE were set out 60° and

45° respectively. Determine the lengths which must be

chained off along CD and CE in order that ED may be

in line with AB produced.

What is the principle of surveying?

If the image formed by the objective lens is not in the same plane with cross hairs, then it is known as

The automatic check for leveling in case of height of instrument method is

Surveyor’s chain consists of 100 links along a length of