Fundamentals of remote sensing

Which of the following would NOT normally be considered as a form of remote sensing?

Electromagnetic radiation can be described completely using wavelength, wave velocity, frequency and amplitude?

Label all the key points in this diagram of the temperature profile through the atmosphere. You need to name the zones defined by the temperature changes, the boundaries between them and also label the altitude axis (approximately)

Label the different regions of the electromagnetic spectrum.

Label this EM Spectrum with the typical processes that emits radiation of that approximate wavelength.

Electromagnetic radiation can be created when... (note: there may be more than one answer)

Which of the following best describes why a "blackbody" is black?

Which of the following statements is NOT true?

The albedo of Earth is the fraction of incident sunlight...

If a represents Earth’s albedo and P is the total power of sunlight incident on Earth, then the power radiated by Earth to space is approximately...

An object will appear red to the naked eye if...

An object will appear white to the naked eye if... (Note: more than one answer may be correct).

Approximately what proportion of the mass of the Earth's atmosphere lies within the Troposphere?

Which of the following in NOT an advantages of satellite measurements?

Satellite observations always have to deal with [blank_start]trade-offs[blank_end]. One particular example is [blank_start]temporal[blank_end] coverage (frequency of measurements) versus level of [blank_start]detail[blank_end]. Typically, a single satellite that provides very [blank_start]frequent[blank_end] measurements will provide a [blank_start]low[blank_end] level of spatial detail.

In the context of atmospheric measurements, the abbreviation "ppmv" means...

Which of the following cannot (yet) be measured from satellite?

The sky appears blue because atmospheric molecules are [blank_start]Rayleigh[blank_end] scatterers in the [blank_start]visible[blank_end] part of the spectrum. Light at the [blank_start]blue[blank_end] end of the spectrum is therefore [blank_start]scattered[blank_end] significantly more than at the [blank_start]red[blank_end] end, where the light mostly passes through atmosphere.

Which of the following exhibit signs of "optical scattering" in the visible part of the spectrum? (There may be more than one correct answer -- click all that apply).

Why are long term (decadal) measurements from satellites difficult, and how is this problem overcome?

Which of the following might a "passive" remote sensing system measure? (Select all that apply).

The five different resolutions are: [blank_start]spatial[blank_end] (based on angular resolution of the instrument), [blank_start]range[blank_end] (based on pulse size for active instruments), [blank_start]spectral[blank_end] (ability to distinguish in wavelength), [blank_start]radiometric[blank_end] (ability to distinguish different brightness levels), [blank_start]temporal[blank_end] (ability to distinguish events in time).

Which of the following best describes the general term "resolution"?

When a blackbody warms up, it will emit radiation with [blank_start]more[blank_end] total energy and with a [blank_start]peak[blank_end] that will go from [blank_start]longer[blank_end] wavelengths to [blank_start]shorter[blank_end] wavelengths.

The Earth's greenhouse effect is mostly driven by which gas?

1) What frequency of EM radiation corresponds to a wavelength of a) 600nm, and b) 3cm?

Domestic electricity supply is at a frequency of 50Hz. What wavelength of electromagnetic radiation would you expect as a result of this oscillating electric field?

Use Wein’s Law for this question (find this on the NLN tutorials or a source of your choice). If you heat an iron bar in a furnace, at what temperature would the rod be at to have a peak in its radiance curve in the middle of the visible range (about 550nm)?

Use Wein’s Law for this question (find this on the NLN tutorials or a source of your choice). If you have an iron bar at the ambient room temperature (say about 20°C) what frequency and wavelength would the maximum be? In what region of the EM spectrum is this?

If a satellite has an inclination angle of 98° it will pass the equator on the ascending pass with a bearing of [blank_start]352˚[blank_end]. At its closest pass to the poles, its bearing will be [blank_start]270˚[blank_end]? (Note, bearings are relative to North).

An EO satellite has an inclination angle of 98° and is orbiting at an altitude of 800km. The orbital period is [blank_start]101mins[blank_end]. If the swath width is 100km, the shortest time this satellite could conceivably provide global coverage is approximately [blank_start]28 days[blank_end]. The instrument measurements [blank_start]do not[blank_end] cover the polar regions.