CST GPS & GNSS Surveying Technologies

Question 1

What is the minimum number of satellites a GPS receiver must track simultaneously to compute a 3D position fix?

Accepted Answer

4 satellites

Answer

2 satellites

Answer

3 satellites

Answer

6 satellites

Question 2

What does the acronym GNSS stand for?

Accepted Answer

Global Navigation Satellite System

Answer

General Navigation Surveying System

Answer

Geodetic Network Satellite Service

Answer

Geographic Navigation Signal Standard

Question 3

Which reference ellipsoid does the GPS system use as its foundational datum?

Accepted Answer

WGS 84

Answer

GRS 80

Answer

NAD 83

Answer

Clarke 1866

Question 4

Which GPS survey method produces the highest accuracy for establishing control points?

Accepted Answer

Static differential GPS with post-processing

Answer

Real-Time Kinematic (RTK)

Answer

Single-point autonomous positioning

Answer

WAAS-corrected navigation GPS

Question 5

What does PDOP measure in GPS surveying?

Accepted Answer

Positional Dilution of Precision

Answer

Primary Data Output Protocol

Answer

Precision Differential Orbital Parameter

Answer

Point Determination of Position

Question 6

What is the typical horizontal accuracy achievable by a single-frequency GPS receiver using WAAS correction?

Accepted Answer

1 to 3 meter accuracy

Answer

Sub-millimeter accuracy

Answer

Sub-centimeter accuracy

Answer

10 to 20 meter accuracy

Question 7

In differential GPS surveying, what is the primary function of the GPS base station?

Accepted Answer

To provide known-position corrections that improve rover accuracy

Answer

To retransmit satellite signals to the rover receiver

Answer

To record atmospheric conditions during the observation period

Answer

To compute and broadcast updated satellite ephemeris data