Remote Sensing ' Lecture 6

1
Lecture 6 Content

• Near Polar orbiting earth
• resources satellites
• LANDSAT

2

• LANDSAT
• Background information
• The LANDSAT program formally the Earth Resource
  Technology Satellite (ERTS) program was opened by
  US NASA
• ERTS 1 launched July 23, 1972
• later renamed LANDSAT1
• retired Jan. 6, 1978

3

• LANDSAT 2 launched Jan. 22, 1975
• retired Feb. 25, 1982
• LANDSAT 3 launched March 5, 1978
• retired (terminated) Sept. 25, 1983
• Sensors
• All carry two sensors MSS and either RBV
  television cameras (on LANDSAT 1,2,3) or a TM
  scanner (on LANDSAT 4 and 5)
• RBVs on LANDSAT 1 and 2 occasionally worked

4

• On LANDSAT 3 the RBV used had two cameras
  recording in a wide waveband and operating so as
  to produce four RBV images per single MSS scene
• A MSS records continually, but for convenience
  the LANDSAT MSS data is cut into scenes

5

• Orbital parameters

6

• LANDSAT Image Characteristics
• Scene ground coverage (km) - 185 x 185
• Photographic scale - 11, 000, 000 to
• 1250,000
• Media - digital data or
• 
  photographic product
• LANDSAT 3 also records MSS data on its on-board
  tape recorder but it has had technical problems

7

• Return Beam Vidicon Camera (RBV)

8

• Multi-spectral Scanner (MSS)

9

• Main application fields of the individual MSS
  bands are
• Band 4 mapping of sediment ladened water and
  delineation of shoals and reefs in shallow water
• Band 5 identification of cultural features
  urban areas, roads, etc.
• Band 6 vegetation studies and delineating
  boundaries between landforms, land and water
• Band 7 vegetation mapping and water/land
  separation. Provides the best penetration of
  atmospheric haze

10
(No Transcript)
11
(No Transcript)
12
(No Transcript)
13
(No Transcript)
14
Landsat 7
15
Landsat 7
16
Landsat 7
17
(No Transcript)
18

• A satellite will travel along a particular track
  once every 16days
• The orbits of two satellites are eight days out
  of phase
• For either one of these satellites, the time
  interval between adjacent tracks is 7 days

19
(No Transcript)
20
(No Transcript)
21
(No Transcript)
22
(No Transcript)
23
(No Transcript)
24

• LANDSAT data is used in many fields
• Geology
• Mineral and petroleum exploration
• Forestry and agriculture
• Hydrology
• Coastal processes
• Land use and land cover
• Mapping environmental changes
• Resources inventories
• Pollution monitoring

25
TM image from Landsat (Los Angeles, CA)
26
MSS image from Landsat 1-5 (Dallas area)
27
TM image from Landsat 4,5 (Dallas area)
28

• The End