Remote Sensing Data collected from aerial photography and satellite imagery GPS Global Positioning System System of satellites amp receivers to plot location GIS Geographic Information System System to manipulate amp display spatial data ID: 463050
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Slide1
Tools: Digital Technology
Remote Sensing – Data collected from aerial photography and satellite imagery.
GPS – Global Positioning System – System of satellites & receivers to plot location.
GIS – Geographic Information System - System to manipulate & display spatial data.Slide2
Remote Sensing
Aerial PhotographySlide3
Remote Sensing
Geostationary Satellites
GOES (Weather)Slide4
Global Positioning System
24 satellites orbit earth every 12 hours
Time of signal to receiver gives distance
Triangulation gives locationSlide5
Geographic Information Systems
System for storing, analyzing and manipulating spatially referenced data
Data consists of layers of one variable such as: vegetation, landforms, or soils
Layers can be overlaid/combined for analysis or displayApplications include: resource management, planning, hazard assessment, etc.Slide6
GEOG 1112: Weather and ClimateEarth-Sun Geometry
SeasonsSlide7
Our Place in Space
Speed of Light
299,792 km/s (186,282 m/s)
Milky Way Galaxy – 100,000 ly across
Our Solar System – 11 ly across
Moon is 1.28 light seconds away
Gravity – mutual attracting force exerted by the mass of an object on all other objectsSlide8
The Sun
About 4.6 Billion Years Old
Average Star, Nothing Special
100 times diameter of Earth
Powers most natural processes on Earth
8.3 min. for Sun’s energy to reach Earth
Strong Magnetic Fields/SunspotsSlide9
Solar Activity and Solar Wind
Solar wind = clouds of electrically charged particles
Sunspots are caused by magnetic storms. These cause changes in the solar output
Sunspots have activity cyclesSlide10
AurorasSlide11
Earth-Sun Relationship
Most Physical Processes on Earth powered by incoming radiation from Sun
Earth-Sun Relationship Complex – Depends on:
Latitude
Position of Sun in Sky
Time of Year
Earth’s Rotation/Axial TiltSlide12
Shape of the Earth
Insolation
Variation in Sun Angle by Latitude
Oblate Spheroid
Subsolar PointSlide13Slide14Slide15
Atmospheric Beam Depletion
Solar radiation is diminished relative to the amount of atmosphere the radiation passes through.
High solar angles see little reduction in intensity as the path from the top of the atmosphere to the surface is short.Slide16
Earth’s Orbit Around the Sun
Plane of the Ecliptic
One Revolution = 365.24 Days
Elliptical Orbit
Perihelion/Aphelion
Seasons not due to distance from SunSlide17Slide18Slide19
Dimensions and DistancesEarth’s orbit
Average distance from Earth to the Sun is 150,000,000 km (93,000,000 mi)
Perihelion
– closest at January 3147,255,000 km (91,500,000 mi)Aphelion – farthest at July 4
152,083,000 km (94,500,000 mi)
Takes energy 8 min 20 sec to reach Earth
Plane of Earth’s orbit is the
plane of the ecliptic