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P
Perfect_Peter_John_
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TECHNOLOGY
Remote Sensing
Lidar
Laser pulses reveal hidden landscapes and guide driverless cars through chaos
30 hours ago
0
What is a major advantage of Lidar over traditional surveying methods?
It relies solely on visual estimations without any electronic measurements.
It uses sound waves instead of light to measure distances.
It provides rapid, highly accurate 3D spatial data by measuring laser pulse reflections.
F
FordMotor
Ford makes good cars for great people. This is the page for our new F1 team.
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EARTH SCIENCE
Remote Sensing
Shuttle Radar Topography Mission
Spaceborne radar revealed Earth's hidden elevations with unprecedented precision
37 hours ago
0
What was the primary advantage of using interferometric synthetic aperture radar (InSAR) on the Shuttle Radar Topography Mission?
It enabled the shuttle to capture color photographs of Earth's surface in high resolution.
It was used to measure atmospheric temperatures rather than surface elevations.
It allowed precise measurement of Earth's surface elevations by capturing radar data from two different angles.
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FordMotor
Ford makes good cars for great people. This is the page for our new F1 team.
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TECHNOLOGY
Remote Sensing
Satellite Imagery
Satellite images unveil hidden patterns shaping Earth's environment and human activity
3 days ago
0
What is a key advantage of satellite imagery over traditional ground-based observation methods?
It always provides higher resolution images than ground-based cameras.
It eliminates all privacy concerns related to aerial surveillance.
It can cover vast and remote areas quickly, providing comprehensive data.
N
Nellieger
I am studying psychology
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TECHNOLOGY
Remote Sensing
Satellite Imagery
Satellite images silently map Earth's changes, shaping decisions on every continent
3 days ago
0
What is a key advantage of satellite imagery over traditional ground-based observation methods?
It can cover large areas quickly and repeatedly, providing comprehensive data.
It always provides higher resolution images than ground-based cameras.
It is unaffected by atmospheric conditions like clouds or weather.
S
Steeeve
Steeeve is an IT guru
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108
SCIENCE
Remote Sensing
Advanced Spaceborne Thermal Emission and Reflection Radiometer
A spaceborne eye revealing Earth's hidden thermal and mineral secrets for over two decades
6 days ago
0
What key advantage does ASTER's broad spectral coverage provide in Earth observation?
It allows ASTER to capture images only in visible light.
It enables detection of subtle differences in surface materials and temperatures.
It limits ASTER's ability to monitor thermal emissions effectively.
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FordMotor
Ford makes good cars for great people. This is the page for our new F1 team.
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TECHNOLOGY
Remote Sensing
LiDAR Scanner
Laser pulses reveal hidden landscapes and guide self-driving cars through complexity
7 days ago
0
What is the primary advantage of LiDAR scanning compared to traditional distance measurement methods?
It provides rapid, precise 3D mapping by measuring the time light takes to reflect back.
It uses sound waves to detect objects, which is faster than light-based methods.
It relies on physical contact with objects to measure distances accurately.
1
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EARTH SCIENCE
Remote Sensing
Earth Observation
Satellite eyes reveal Earth's secrets but spark fierce debates over privacy and control
9 days ago
0
What is a major trade-off in Earth observation between satellite and ground-based sensors?
Satellites are cheaper and easier to maintain than ground sensors.
Satellites provide broad coverage but less detailed local data, while ground sensors offer detailed data but limited coverage.
Ground sensors can replace satellites entirely for global monitoring.
B
Bb115
Books and cars
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TECHNOLOGY
Remote Sensing
Satellite Imagery
0
Satellite images quietly transform global decisions from climate action to urban growth
12 days ago
Contrary to popular belief, satellite imagery is not just about pretty pictures of Earth from space; it’s a powerful tool that shapes everything from environmental policy to urban planning and disaster response. These images, captured...
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Bonbo
Me as you
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EARTH SCIENCE
Remote Sensing
Earth Observation
Satellite eyes reveal Earth's hidden changes before humans can see them
12 days ago
0
What is a major challenge in utilizing Earth observation data effectively?
Managing and analyzing the vast amounts of data collected from various sensors
The inability of satellites to capture data over oceans
Earth observation only provides data about the atmosphere, not the land or oceans
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Bb115
Books and cars
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TECHNOLOGY
Remote Sensing
Satellite Imagery
Global powers and private firms vie for dominance in satellite imaging technology
8 Feb 2026
0
What is a major consequence of the competition between governments and private companies in satellite imagery?
Governments have completely stopped using satellite imagery for security purposes
Satellite imagery is only used for military applications and not available commercially
Increased availability and resolution of Earth images for commercial and public use
S
SteveO1
Technology and cars
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SCIENCE
Remote Sensing
Microwave Radiometer
Microwave radiometers reveal hidden atmospheric secrets beyond visible light
5 Feb 2026
0
How do microwave radiometers improve weather forecasting compared to visible light sensors?
By capturing visible light reflections from clouds to predict weather patterns.
By detecting only surface temperatures without atmospheric information.
By measuring thermally emitted microwaves, they can penetrate clouds and provide atmospheric temperature and humidity data.
S
Stevek113
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TECHNOLOGY
Remote Sensing
LiDAR Technology
LiDAR uses laser light to create detailed 3D maps by measuring reflected light travel time
2 Feb 2026
0
What is the primary principle behind how LiDAR measures distances to objects?
Measuring the intensity of light absorbed by the target
Measuring the time it takes for laser light to reflect back from the target
Using sound waves to detect the distance to the target
J
JOHN_BASH
Expert in mushrooms and fungi
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SCIENCE
Earth Science
Remote Sensing
Remote sensing reveals Earth's secrets without ever touching its surface
1 Feb 2026
0
Which of the following best explains why remote sensing is advantageous over in situ observation for Earth studies?
It provides more detailed information than any other method regardless of scale or location.
It allows for large-scale data collection without physical contact, enabling observation of inaccessible or vast areas.
It requires physical samples to be collected and analyzed remotely.
S
SteveO1
Technology and cars
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EARTH SCIENCE
Remote Sensing
Moderate Resolution Imaging Spectroradiometer (MODIS)
MODIS sensors aboard Terra and Aqua satellites provide vital data for global climate and environmental monitoring
30 Jan 2026
0
What is one key difference between MODIS and VIIRS sensors despite their similar designs and orbits?
VIIRS sensors operate only in visible light, while MODIS operates only in infrared.
They have subtle differences that result in similar but not identical data products.
MODIS sensors are ground-based instruments, whereas VIIRS sensors are satellite-based.
J
JOHN_BASH
Expert in mushrooms and fungi
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EARTH SCIENCE
Remote Sensing
Moderate Resolution Imaging Spectroradiometer (MODIS)
MODIS sensors aboard Terra and Aqua satellites provide vital global climate and earth observations
28 Jan 2026
0
What is the primary advantage of having two MODIS sensors aboard different satellites like Terra and Aqua?
They capture images at much higher resolution than any other satellite sensor.
They provide more frequent and comprehensive global coverage by observing Earth at different times.
They are used exclusively for monitoring ocean temperatures and do not observe land or atmosphere.
S
Stevek113
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SCIENCE
Earth Science
Remote Sensing
0
Remote sensing reveals Earth's secrets from a distance without physical contact
10 Jan 2026
Remote sensing reveals Earth's secrets from a distance without physical contact Remote sensing is the process of acquiring information about an object or phenomenon without making physical contact with it. This technique is particularly important...
J
JAG_GUY
Jaguar Enthusiast Par Excellence who writes about car-related topics
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SCIENCE AND TECHNOLOGY
Space Exploration
Nasa
United States space program spans civil, military, intelligence, and commercial sectors
30 Dec 2025
2
Which U.S. agency is primarily responsible for military space capabilities and systems like the Global Positioning System?
National Aeronautics and Space Administration (NASA)
United States Space Force
National Reconnaissance Office (NRO)
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