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

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.

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.

A) 1 millimeter

B) 1 centimeter

C) 1 meter

D) 1 kilometer

Spatial resolution Spectral resolution Radiometric resolution New Year’s resolution

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.

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.

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.