Remote sensing exam 1

True color images typically put the green band in this color

green

example of an earth surface with specular reflections

mirror-like smooth surface, (road, smooth lake, ice)

3 things that can happen to incoming solar radiation

reflected, transmitted, absorbed

regular, geometric shape and pattern is a satellite image are an indication of…

human use/ presence

abrupt changes in the frequency of tone will create the appearance of

texture

the distance in meters between successive wave crest

wavelength

wavelength smaller than ultraviolet

x-ray and gamma

the 8 elements of visual image interpretation

• shape

• size

• texture

• pattern

• tone

• shadow

• association

• site

the science of acquiring info about the earht’s surface without actually being in contact with it

remote sensing

range of visible light in micrometers or nanometers

460-750 nm ir .4-.75 mm

another name for a single-band image

grayscale

spectral resolution

the number and spectral regions the sensor records in

the 3 primary characteristics influencing how much reflected energy reaches the sensor

• geometric structs

• chemical composition

• physical condition

types of bird used to take images in WWI

pigeon

the reason Nadar is important to remote sensing

he took the first aerial photographs from hot air balloons in the 1800s

the electromagnetic spectrum in comprised of 2 perpendicular fields

electrical field and magnetic field

1st civilian satellite program that provided the operational

landsat (ERTS1)

region of the ems where water reflects highest

visual (blue)

an object appears blue, theses are the portions of visible light that have been absorbed

ROYCIV

portion of ems best used for identifying vegetation

near infared, stressed higher is short wave

band combination for a false color composite image

NIR in red, red band in green, green in blue

3 reasons visual image interpretation remains an important skill in remote sensing today

• pattern recognition

• used for 3D depth perception height

• depth measurements

• used to document historical change

the basic component of electromagnetic (light) energy is

photon

region of the ems wavelengths larger than microwaves

radio waves

a satellite designed to orbit around the entire earth is known as

sun synchronous orbit

region of the ems where vegetation has the highest absorption of light energy

red

radiometric resolution

the sensitivity of detectors to differences in electromagnetic energy (in bits)

spatial resolution

size of individual image pixels on the earths surface determined by the instantaneous field of view of the sensor

the reason water appears very dark on RS imagery

high absorption

temporal resolution

how often the sensor acquires data/repeat coverage of the same area of the earth