What is the spatial resolution of the panchromatic image data produced by IKONOS?

What is a spectral response pattern?
A) The range of wavelengths that a sensing system is able to detect.

B) The magnitudes of energy that an object reflects or emits across a range of wavelengths.

C) The ability of a sensor to detect small differences in wavelength.

D) The ability of a sensor to detect small differences in energy magnitude.

2.
What is a panchromatic image?
A) An image that is made up of all the colors of the spectrum.

B) A black and white image.

C) An image produced from film (or from digital data produced by a sensor) which is sensitive to a broad range of wavelengths, including the entire visible band.

D) An image produced from film (or from digital data produced by a sensor) which is sensitive to a narrow range of wavelengths, such as the gray band.

3.
What is the spatial resolution of the panchromatic image data produced by IKONOS?
A) 1 millimeter

B) 1 centimeter

C) 1 meter

D) 1 kilometer

4.
Which kind of resolution refers to the minimum difference in wavelength that a sensor can detect?
Spatial resolutionSpectral resolutionRadiometric resolutionNew Year’s resolution

spatial resolution
spectral resolution
radiometric resolution
new year’s resolution
5.
Which statement correctly compares supervised and unsupervised classification procedures?
A) Supervised classification involves defining classes by selecting parts of an image that are known to be representative of each class. After classes are defined, every other pixel in the image is assigned to the class with the most similar multispectral reflectance values.Unsupervised classification involves clustering similar pixels automatically, without considering the real-world entities that the clusters represent.

B) Supervised classification involves clustering similar pixels automatically, without considering the real-world entities that the clusters represent. Unsupervised classification involves defining classes by selecting parts of an image that are known to be representative of each class. After classes are defined, every other pixel in the image is assigned to the class with the most similar multispectral reflectance values.

6.
What is the difference between an active sensor and a passive sensor?
A) Passive sensors follow geostationary orbits in which they are positioned over the same ground locations at all times. Active sensors follow near-polar orbits that pass over every point on the Earth every 16 days.

B) Active sensors both transmit and measure electromagnetic energy. Passive sensors only measure it.

C) Passive sensors have no defense against enemy attack. Active sensors self-destruct during hijack attempts.

D) Active sensors actively transmit measurements to ground stations, whether the personnel on duty want the data or not. Passive sensors wait patiently until data are requested.

7.

What does the red signify in the “false color” image above, which is featured at the USGS EarthShots site?
A) Red represents areas engulfed in an extensive brush fire.

B) Red represents reflectance values in the visible green band, which vegetation reflects strongly.

C) Red represents reflectance values in the visible red band, which vegetation absorbs strongly.

D) Red represents reflectance values in the near-infrared band, which vegetation reflects strongly

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