Chapter 3: Satellite and Sensors

What is the main function of a satellite?

• To focus energy from a scan-line

• To make measurements with sensors

• To record analogue signals on film

• To orbit the Earth

Which type of scanner has a linear array of sensor/detector elements along the track direction?

• Pushbroom scanner

• Whiskbroom scanner

• Side-looking scanner

• Rotating mirror scanner

What is the typical altitude range for satellites in Low Earth Orbit (LEO)?

• 2,000-35,786 km

• 2,000-35,000 km

• 35,786 km above the equator

• 160-2,000 km above the surface

Which type of satellite orbits the Earth at the same speed the Earth rotates?

• Low Earth Orbit (LEO)

• Geostationary Orbit (GEO)

• Medium Earth Orbit (MEO)

• Sun-synchronous Orbit

What is the purpose of a Geostationary Orbit (GEO) satellite?

• To capture detailed images of distant galaxies

• To provide global internet coverage

• television broadcasting

• To orbit quickly around the Earth

What does the term 'IFOV' stand for in satellite imaging?

• Infrared Field of Vision

• Instantaneous Field of View

• Intense Focus of Vision

• Internal Field of View

Which type of resolution refers to the area or size of the smallest dimension on the Earth's surface that the sensor can capture?

• Temporal resolution

• Spatial resolution

• Spectral resolution

• Radiometric resolution

Which type of resolution describes how often a remote sensing system captures an image at the same area and viewing angle?

• Spectral resolution

• Radiometric resolution

• Temporal resolution

• Spatial resolution

What is the main function of a Whiskbroom scanner?

• To transmit beams from the side of the aircraft

• To focus energy from a scan-line

• To have a linear array of sensor/detector elements

• To scan each ground-resolution cell one-by-one

Which type of resolution indicates the number of grey levels that can be measured by a sensor?

• Spatial resolution

• Spectral resolution

• Radiometric resolution

• Temporal resolution