lecture 4

Question 1

whats a satelite

Answer 1

celestial body orbiting the earth or another planet

Question 2

what is a satelite science

Answer 2

artificial body placed in orbit around the earth or moon or sanither planet to collect information or communication

Question 3

what are the types of orbit

Answer 3

geostationary, low earth orbit, medium earth orbit, high earth orbit

Question 4

where does geostationary orbit

Answer 4

just above the equator

Question 5

what does geostationary orbiting satellite do

Answer 5

communication and weather

Question 6

what is low earth orbiting used for

Answer 6

(leo) remote sensing

Question 7

how many sent to leo and how many still works

Answer 7

3000 sent, 1200 still works

Question 8

how high does leo orbit

Answer 8

2000km

Question 9

how fast does leo orbit

Answer 9

90~130 minute

Question 10

what is meo used for

Answer 10

navigation and communication such as GPS, glonass and galileo

Question 11

where does MEO orbit

Answer 11

20,000km

Question 12

what is high earth orbiting satelite do

Answer 12

study stuff beyond earth
sometimes earth weather

Question 13

wheree does high earth orbit

Answer 13

36,000km

Question 14

how many of satelute in irbit actually work

Answer 14

25%

Question 15

what are the 5 different satellite systems

Answer 15

weather, communication, earth observation, astronomical, minarures

Question 16

weather satellites use

Answer 16

measure amount of heat energy how much water in clouds

Question 17

communication example for satellite

Answer 17

internet tv etc.

Question 18

earth observation eg satelite

Answer 18

vegetation change flooding temperature changes

Question 19

astronomical satellites used for

Answer 19

potential meteor

Question 20

gps abbreviation

Answer 20

global positioning system

Question 21

whats triangulation

Answer 21

tells location depending the amount of satellites you are connected to
the intersection determines your location

Question 22

how many satellites do you need for a god guess off location

Answer 22

4

Question 23

what are the two types of sensors

Answer 23

passive active

Question 24

what are passive sensors

Answer 24

collecting data using natural resources

Question 25

use of passive sensors

Answer 25

satellite photo, vegetation changes, fire hazard

Question 26

what is an active sensors

Answer 26

send something and take days collecting days you have sent out

Question 27

three examples of active sensors

Answer 27

LiDAR
RANAR
SONAR

Question 28

what is lidar abbreviation

Answer 28

light detection and ranging

Question 29

what is radar abbreviation

Answer 29

radio detection and ranging

Question 30

what is sonar abbreviation

Answer 30

sound detection and ranging

Question 31

what ours ratio detection used in

Answer 31

radio waves to determine the range angle or velocity on objects

Question 32

SRTM abbreviation

Answer 32

shuttle radar topography mission

Question 33

what is srtm used for

Answer 33

accurate digital elevation mission

Question 34

example of aerial images

Answer 34

orthophoto, stereoscopic photo SFT (structure from motion)

Question 35

what is orthophoto

Answer 35

aerial photographer image geometrically corrected

Question 36

what is stereoscopic photo

Answer 36

strip pair image containing two views is a scene side by side

Question 37

example of primary data collection using raster

Answer 37

remote sensing image aerial photography

Question 38

example of primary data connection using vector

Answer 38

GNSS data collection survey

Question 39

what is GNSS

Answer 39

global navigation satellite system

Question 40

example of secondary data collection using raster

Answer 40

scanning maps DEMs from maps

Question 41

DEM abbreviation

Answer 41

digital elevation model

Question 42

example of secondary data collection using vector

Answer 42

digitisation vectorising object from maps