Deck 11: Images From Space

Question 1

A sensor that will be measuring only one wide band of wavelengths is which type of sensor?

A)Panchromatic sensor
B)Multispectral sensor
C)Hyperspectral sensor
D)Radiometric sensor

Answer 1

A

Question 2

A typical Landsat TM scene measures about

A)170 * 183 km.
B)16 * 16 km.
C)181 * 197 km.
D)7.5 km * 7.5 km.

Answer 2

170 * 183 km.

Question 3

Pan-sharpening is used to

A)sense multiple small bands simultaneously in the panchromatic portion of the EM spectrum.
B)fuse panchromatic imagery with multispectral imagery to get a finer image.
C)take the pixels of an existing image and transform them into finer resolution pixels.
D)narrow down the sensor's swath width and obtain finer spatial resolution for a sensor.

Answer 3

B

Question 4

An 11-bit sensor can measure how many levels?

A)11
B)121
C)256
D)2048

Question 5

Which of the following satellites' panchromatic sensors has the coarsest spatial resolution sensor?

A)IKONOS
B)Quickbird
C)WorldView-1
D)WorldView-2

Question 6

Landsat 7 carries which of the following sensors?

A)HRG
B)MSS
C)TM
D)ETM+

Question 7

Satellites in near-polar orbit

A)follow a north-to-south orbital path.
B)follow an east-to-west orbital path.
C)are "locked" into a constant orbital fixed position near either the north or south pole.
D)use the equator as the orbital path being followed.

Question 8

A sensor's ability to determine fine differences in a band of energy measurements is a sensor's

A)spectral resolution.
B)spatial resolution.
C)radiometric resolution.
D)temporal resolution.

Question 9

What is the status of Landsat 7?

A)It was decommissioned and replaced in orbit by Landsat 8 in 2011.
B)Its scan-line corrector failed in 2003.
C)It did not achieve orbit and was replaced with the LDCM program.
D)It continues its mission unabated (alongside Landsat 5).

Question 10

Off-nadir viewing allows a sensor

A)to obtain imagery with a half-meter or finer resolution.
B)to sense beyond the usual 8-bit range of values.
C)to image locations not directly under the sensor.
D)to image more than 100 bands simultaneously.

Question 11

An early satellite remote sensing program that used film for taking images was

A)Pleiades.
B)Spot.
C)Earlybird.
D)Corona.

Question 12

A sun-synchronous orbit indicates that

A)the satellite continually images the same sun-illuminated location on the ground .
B)the orbit is set up so that an area on the ground is imaged at the same time of day.
C)the satellite orbits the Sun in the same orbital path as the Moon.
D)the orbit is set up so that the sun-side of the Earth is imaged exactly twice in one day.

Question 13

Landsat 7's sensor has the capability to see the same area on the ground every

A)2 days.
B)8 days.
C)16 days.
D)26 days.

Question 14

A whiskbroom sensor is a(n)

A)hyperspectral sensor.
B)linear-array sensor.
C)along-track sensor.
D)across-track sensor.

Question 15

A geostationary satellite

A)rotates at the same speed as the Earth.
B)completes an orbit around the Earth every 12 hours.
C)takes 16 days to complete its orbital path.
D)takes exactly two days to complete a single orbit.

Question 16

The ground size of one pixel's worth of imagery is a measure of

A)radiometric resolution.
B)spectral resolution.
C)temporal resolution.
D)spatial resolution.

Question 17

How often a satellite can return to image the same area on the ground is a measure of that sensor's

A)temporal resolution.
B)spectral resolution.
C)spatial resolution.
D)radiometric resolution.

Question 18

Which of the following satellites' multispectral sensors has the finest spectral resolution?

A)IKONOS
B)Quickbird
C)GeoEye-1
D)WorldView-2

Question 19

The specific bands and wavelengths that a sensor can measure defines its

A)temporal resolution.
B)radiometric resolution.
C)spatial resolution.
D)spectral resolution.

Question 20

Which of the following satellites' carries the finest spatial resolution sensor?

A)WorldView-2
B)IKONOS
C)GeoEye-1
D)Quickbird