final exam review Flashcards
Spectralon demonstrates the highest ______ reflectance of any known substance
diffuse
2 absorption bands in nanometers
1400 nm and 1850 nm (1.4um and 1.85 nm)
the spectrum of florescent light is characterized by _____ which are not seen in the quartz-halogen lamp
spikes
Can white light be created by mixing colored light?
yes
This person was the first to use a prism to disperse colored light
newton
three types of platforms used to take arial photos before airplanes
pigeon, hot air ballon, kite
First satellite to be launched into space
sputnik
The first photograph , invented by Niepce had to be exposed for how many hours to record an image?
8 hours
Daguerre improved on Niepce’s design. Thus photographs developed using his method were known as …
Daguerreotypes
the first photos recorded positive or negative images?
positive
what type of aerial platform was used during the civil war
balloons
type of aerial platform used by the US to try to spy on Russia and China before the U2 aircraft
high altitude balloons
what type of platform was Corona
satellite
UAV stands for
unmanned aerial vehicle
Landsat 4 and 5 have ______ quantization levels
8 bit
type of orbit of landsat
sun-synchronous
T or F: The GOES satellite is useful for weather monitoring
True
Remotely sensed multispectral bad data is stored in a matrix of
rows and columns
DPI
dots per inch
swath width of landsat platforms 1,2,3,4,5
185 km
year the first version of landsat was launched
1972
both sound and light exhibit properties of
waves
sound cannot travel through a
vacuum
sound is faster in air or water?
water
reflection that occurs in a smooth mirror-like surface is
regular
electromagnetic radiation is generated when an electric charge is…
accelerated
sound is transmitted via
compression waves
reflection that occurs from a rough irregular surface is referred to as
diffuse
what is the SI unit of power?
watt, which is one joule per second
speed of light in a vacuum
300,000,000 m/s
in regular reflection the angle of reflection is equal to the angle of
incidence
visible spectrum
0.4 - 0.7 um
units of W m^-2 are used to express
exitance and irradiance
fraction of incident radiant energy absorbed by a surface is given the quantity termed
absorptance
considering the scattering of light in the atmosphere, which color is scattered the most?
blue
true or false: differences in wavelength among different types of EMR result from differences in manner of production
true
radiant flux per unit solid angle leaving an extended source in a given direction per unit projected source area in that directionsd (W m^-2 sr^-1 is called the _____ of the source
radiance
the direction in which scattered light travels is unpredictable, whereas the direction is ______
predicable
type of scattering when the diameter of the matter (usually air molecules) is many times smaller than the wavelength of the incident electromagnetic radiation
rayleigh
type of scattering when there are essentially spherical particles present with diameters approximately equal to the wavelength of radiation being considered
mie
type of scattering produced when there are particles in the atmosphere several times the diameter of the radiation being transmitted
non-selective
range of wavelengths (or frequencies) int he electromagnetic spectrum within which radiant energy is absorbed by substances such as water carbon dioxide, oxygen, ozone, and nitrous oxide
absorption band
RADAR pulse length measured in
micro seconds
planimetrically-uncorrrected RADAR imagery displayed in
slant-range geometry
planimetrically-corrected RADAR imagery displayed in
ground-range geometry
thermal _____ measure of tendency of material to transfer energy to another substance
conductivity
thermal ____is a measure of tendency of a material to store energy
capacity
thermal ______is a measure of the tendancy of a material to remain at the same temp as external temp is changed
inertia
______ period of the day after sunrise and near sunset when the radiant temp of many materials is the same
crossover
most thermal investigations tryu to achieve a high spatial res by flying the sensor at a ______
low alt.
thermal infrared spectrum
3 um to 14 um
infrared discovered by
herschel
correlation of object’s kinetic temp and ____ is basis of thermal infr. remote sensing
radiant
emissivity is the ratio between the radiant flux exiting a real-world object and the radiant flux that would exit a blackbody at the same _____
wavelength
we can det. the dominate wavelength of emission from a blackbody using Wein’s Displ. Law if we know the ______ of the blackbody
temp
true or false: the emmisivities of polished metal tend to be much less than the emissivityof pure liquid water
true
the Russ. physicist Kirchoff found that in the infra. port. of the spect. , the spectral emmissivity of an object generally equals its spectral ___
aborptivity
LIDAR systems utilize wavelengths in the ____ spectral region for topographic mapping
1040-1060 nm
LIDAR systems utilize wavelengths in the ____ spectral region for bathymetric mapping
532 nm
when using a 1064nm laser in LIDAR remote sensing, would you be able to measure signal from bottom of a clear pond
no
instantaneous laser _____
footprint
uses roll, pitch, and yaw gyroscopes and accelerometers to measure the orien. of the LIDAR antenna at the exact moment every pulse is transmitted and received
inertial measurement unit
