Download presentation
Presentation is loading. Please wait.
Published byJuliana Cross Modified over 9 years ago
1
Fundamentals of Remote Sensing Gathering information without physical contact
2
Can you sense things remotely?
3
Remote sensing may be accomplished in any of several ways A LOT further away Further away Close up Caroline Wicks
4
Organic content of soil
5
LIGHT COLORWHITE BACKGROUND (WB) SOIL 1% SOIL 1 (SOIL 1/WB)*100 SOIL 2% SOIL 2 (SOIL 2/WB)*100 RED DEEP RED IR 1 IR 2 IR 3 IR 4 1.Take a set of readings on the white background 2.Take a set of readings of Soil Sample 1 3.Divide Soil readings by white readings and multiply by 100 4.Repeat with Soil Sample 2 5.Graph your percentages vs. wavelength
6
1. Graph percent reflectance of soil 1 vs. wavelength. 2. Connect points with a solid line. 3. Graph percent reflectance of soil 2 vs. wavelength. 4. Connect points with a dotted line. 5. Make a legend.
7
Soils rich in organics have lower reflectances
8
So, why can’t we just use our eyes? Oil or Algae? How do you know?
9
They don’t tell the whole story! Oil Spill Red Tide (Algal Bloom)
11
Polar Orbiting Earth Satellite POES
12
Geostationary Orbiting Earth Satellites (GOES)
13
POES
14
GOES Photo: ESA
15
Electromagnetic Energy
17
SeaWiFS Instrument Package Sea-viewing Wide Field of view Satellite Carried on the satellite “Seastar” Senses visible and NIR (near infra-red) Ocean Color
19
TOPEX/Poseidon
20
Jason
21
RADAR = RAdio Detection And Ranging
22
Satellite Altimetry TOPEX/POSEIDON
23
AVHRR AdVanced High Resolution Radiometer
24
True-Color Imagery Land Water Clouds
25
Chesapeake Bay Stream Sediments
26
Brazil Rainforest Ex-Rainforest
27
Try interpreting some satellite images
29
Temperature A BB A 4 3 2 5 6 7 8 2021 20 22 27 28 26 1 2832 3028
30
2021 2022 27 28 26 2832 3028
31
1 2 3 4 8 7 6 5 9 1314 15 16 1211 10 Mapping Grid 20 – 24 o = Blue 25 – 28 o = Orange 29 – 32 o = Red
32
Using the IR Thermometer DO NOT point the thermometer at another person. Point at target and pull trigger. Release and record the temperature in the appropriate spot on the recording grid. Record about 4 temperatures per grid area. Return to your seat and “color” mapping grid. Be sure to include a legend of colors.
34
Transpiration cools leaves
35
RADARSAT uses microwaves
36
Passive or Active?
38
Remote Sensing Techniques Continuing to Evolve
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.