1. (Quiz) Spectral Resolution Spectral resolution: land set> spot (band less)
2. transparency透明性：microwave > visible > NIR
3. Landsat MSS bands
Wherein the band 4 to be blue, weak signal
4. amplitude^2=intensity
Square of the amplitude intensity
c = frequency * wavelength (in vacuo, c = 3 * 10 ^ 8m / s)
5. (quiz) polarisation偏振: circular, random, plane, elliptical
circular and random are hard to tell the difference
6. rader twice Doppler Effect
Vertical structure 7. Vertical structure of the atmosphere of the atmosphere
Troposphere对流层：from the ground surface to 10 - 17 km
Stratosphere stratosphere: from 10 - 17 km to about 50 km
Mesosphere中间层：from about 50 km to about 90 km
Thermosphere热层：from about 90 km to 500 km
8. the interaction of electromagnetic radiation with the atmosphere
a. scattering scattering
Rayleigh scattering: When particles and very small compared to the wavelength of radiation, such as dust or small dots nitroxide molecule (blue sky, sunset)
Mie scattering: the size of the wavelength of the radiation is almost the same particle, such as dust, pollen, smoke, and water vapor
Nonselective scattering (water drops> wavelength): particles larger than a wavelength of radiation, such as large water droplets and dust (fog and clouds appear white to red light [blue + green +] = white)
. B absorption Absorption:
Molecular atmosphere absorb different wavelengths of energy, ozone, water vapor and carbon dioxide are absorbed EMR> atmospheric three main components of the atmospheric windows (Ozone, carbon dioxide, and water vapour)
atmospheric windows: the relative (but not completely) free of scattering and absorption effects spectral region, compared to the radiation of other wavelengths of electromagnetic radiation by a change in the atmosphere of these regions is small
9. Scattering factors
a. wavelength of the radiation wavelength of the radiation
b. abundance of particles or gases or gas particles abundance
c. distance the radiation travels through the atmosphere from the radiation through the atmosphere
10. Reflection（R）+Absorption（A）+Transmission（T）= Incident (I)
11. Specular Reflection mirror reflection
If mirror reflection refers to a relatively smooth reflective surface, when the incident parallel light rays incident on the reflective surface, reflected still in parallel to a direction
12.
13. spatial resolution = IFOU linear = GSD
GSD is not the same with CGI, CGI is pixed sive which no not have physical meaning, but GSD can be converted to any pixed size
14. rader wavelength < light
15. SLR: Satellite Laser Ranging Satellite Laser Ranging
VLBI: Very Long Baseline
Insar: Interferometry Synthetic Aperture Rader干涉测量合成孔径雷达
16. soil before flooding is medium brightness, after flooding is low brightness
17. NDVI= (NIR-R)/(NIR+R)
18. Diffuse Reflection漫反射
从相对粗糙的表面（根据电磁辐射的波长）获得的反射类型，其中反射的光线在各个方向上散射
通常由许多具有彼此相对随机相位的个体反射组成，例如来自天然森林冠层或农业领域，漫反射的反面是镜面反射或相干
19. Roughness vs. wavelength粗糙度与波长
一个特定的目标是反射、漫反射，或者介于两者之间取决于入射辐射的波长与表面的粗糙度相比
如果波长远小于表面变化或构成表面的颗粒大小，漫反射将占主导地位
20. The Rayleigh criteri
h = λ/( 8cosθ )
If h > λ, the surface acts as a diffuse reflector漫反射镜
If h < λ, the surface is specular镜面的
h是s surface irregularity height表面不规则高度
λ is the wavelength
θ是入射角（从垂直于表面的法向[垂直]测量）
21. image是指任何图形表示，无论使用什么波长或遥感设备来检测和记录电磁能
photograph是指被检测到并记录在胶片上的图像
All photographs are images, but not all images are photographs
22. 将图像细分为大小相等且形状相同的小区域，称为picture elements or pixels
用数值或数字（计数值）表示每个区域的亮度
23. channel：收集和存储信息的窄波长范围
Data storage: CCT (computer compatible tape), CD, and DVD
来自每个通道的数据被表示为原色（蓝色、绿色和红色）之一，并且根据每个通道中每个像素的相对亮度（即数字值），原色以不同的比例组合以表示不同的颜色