18 Questions
What is the main purpose of SBAS (Satellite-based augmentation systems)?
To support regional augmentation through additional satellite-broadcast messages
How many orbital planes does the GPS constellation have?
3
Which satellite positioning system was launched first?
GPS
What is the purpose of using multiple frequencies in GPS positioning?
To improve accuracy and mitigate signal distortion
How many satellites make up the nominal GPS constellation?
24
What is the significance of GPS satellites having antipodal distribution?
It helps in minimizing signal interference between satellites
What is the primary purpose of land surveying?
To measure the positions of natural and man-made features on the Earth's surface
Which technique provides map-like coverage of very large areas?
Aerial photogrammetry
What is a key feature of aerial photogrammetry?
Use of stereo pairs for a 3D view
Which satellite series is known for its global remote sensing capabilities?
Sentinel Series (ESA)
What is the main function of Global Navigation Satellite Systems (GNSS)?
Measuring positions on the Earth's surface using satellite technology
In geospatial data collection, what is LIDAR primarily used for?
Measuring accurate planimetric and elevation data
What does the acronym LIDAR stand for?
Light Detection and Ranging
In the context of attribute data collection, what is the characteristic of data measured on a Ratio Scale?
Data have a true zero point and can be compared using ratios
Which type of measurement scale assigns discrete categories that have a specific order but the exact differences between the categories are not known?
Ordinal Scale
What is the purpose of Aerial LIDAR Range Scan in land surveying?
Measuring distances from an aircraft to the ground using laser beams
What does GAGAN stand for in the context of satellite remote sensing?
Global Positioning System Aided Geo Augmented Navigation
What is the main function of Inertial Navigation System in conjunction with LIDAR during aerial photogrammetry?
Determining the aircraft's position and orientation without external references
Explore the different sources of geospatial data and attribute data used in land surveying, aerial photogrammetry, satellite remote sensing, LIDAR, field investigation, and more. Learn about spatial data collection methods for topographic and thematic mapping.
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