Department of Geomatics Remote Sensing, Principles and Applications

1
Department of Geomatics Remote Sensing,
Principles and Applications

• SATELLITE IMAGING SYSTEMS

2
Department of Geomatics Remote Sensing,
Principles and ApplicationsSatellite Imaging
Systems

• Landsat
• NOAA-AVHRR
• SPOT
• IRS series
• Environmental satellites
• Radar Satellites
• New commercial satellites

3
Department of Geomatics Remote Sensing,
Principles and Applications

• Satellite Imaging Systems
• Landsat
• First launced in 1973
• Multi Spectral Scanner (MSS)
• 4 bands (Green, Red, NIR x2)
• 80m ground resolution
• 185Km swath
• First Series -
• Landsats 1,2 and 3

4
Department of Geomatics Remote Sensing,
Principles and Applications

• Satellite Imaging Systems
• Landsat
• Landsat 4 Launched 1983
• Upgraded instrument -
• Landsat Thematic Mapper (TM)
• Seven bands
• Blue, Green, Red, NIR,
• SWIR x 2, TIR
• 30m ground resolution
• 185Km swath
• Landsat 5 still operating

5
Department of Geomatics Remote Sensing,
Principles and ApplicationsSatellite Imaging
Systems

• NOAA-AVHRR
• A weather satellite series
• Launched in 1978
• 5 bands, 1.1Km resolution
• 2700 Km swath
• Cheap satellite for global or continental scale
  monitoring

6
Department of Geomatics Remote Sensing,
Principles and ApplicationsSatellite Imaging
Systems

• NOAA-AVHRR
• Ocean Temperature Mapping

7
Department of Geomatics Remote Sensing,
Principles and ApplicationsSatellite Imaging
Systems

• SPOT
• French satellite launched in 1986
• Two modes of operation
• Off nadir look capability
• Stereo capability

8
Department of Geomatics Remote Sensing,
Principles and ApplicationsSatellite Imaging
Systems

• SPOT
• Multi-spectral mode
• MS - 3 bands
• Green, Red, NIR
• Twenty meters resolution

9
Department of Geomatics Remote Sensing,
Principles and ApplicationsSatellite Imaging
Systems

• SPOT
• PAN - 1 band at 10m resolution

10
Department of Geomatics 451-412 Remote Sensing
PrinciplesSatellite Imaging Systems

• IRS SATELLITES
• IRS 1A
• 4 bands
• 72m resolution
• 148 Km swath
• Launched in 1988
• IRS 1B
• 36m resolution
• Launched 1991

11
Department of Geomatics Remote Sensing,
Principles and ApplicationsSatellite Imaging
Systems

• IRS SATELLITES
• IRS 1C
• 4 bands
• 25 to 70m resolution
• 141 Km swath
• Launched 1996
• Also PAN
• 5m resolution
• 70 Km swath
• WIFS -
• 1 band at 188m res.
• 774 Km swath

12
Department of Geomatics Remote Sensing,
Principles and ApplicationsSatellite Imaging
Systems

• Environmental Satellites
• RESURS
• TOPEX/Posidon
• SeaWIFS
• Envisat - not yet launched

13
Department of Geomatics Remote Sensing,
Principles and ApplicationsSatellite Imaging
Systems

• Environmental Satellites
• RESURS
• Russian satellite marketed by Sweden
• Five bands, vis-NIR
• 150m resolution
• 600Km swath

14
Department of Geomatics Remote Sensing,
Principles and ApplicationsSatellite Imaging
Systems

• Environmental Satellites
• TOPEX/Posidon
• French/USA oceanographic satellite
• Radar altimeter
• Measures wave height

15
Department of Geomatics Remote Sensing,
Principles and ApplicationsSatellite Imaging
Systems

• Environmental Satellites
• TOPEX/Posidon
• French/USA oceanographic satellite
• Radar altimeter
• Measures wave height
• Sea surface height

16
Department of Geomatics Remote Sensing,
Principles and ApplicationsSatellite Imaging
Systems

• Environmental Satellites
• SeaWIFS
• Oceanographic colour image
• History - CZCS, MOS-1
• 8 bands in vis-NIR
• Chlorophyll concentration

17
Department of Geomatics Remote Sensing,
Principles and ApplicationsSatellite Imaging
Systems

• Radar Satellites
• SEASAT
• SIR series
• ERS series
• JERS-1
• Radarsat
• Considered later

18
Department of Geomatics 451-412 Remote Sensing
PrinciplesSatellite Imaging Systems

• New Commercial Satellites
• Earth Watch
• Space Imaging
• Orbital - Died
• Resource 21 - Died

19
Department of Geomatics Remote Sensing,
Principles and ApplicationsSatellite Imaging
Systems

• New Commercial Satellites
• Earth Watch
• Launched Late 1998 - Died
• Re-launch 2000
• Multispectral
• 3 bands
• 15m resolution
• Pan
• 3m resolution

20
Department of Geomatics Remote Sensing,
Principles and ApplicationsSatellite Imaging
Systems

• New Commercial Satellites
• Space Imaging
• Due for launch 1999
• Multispectral
• 4 bands
• 4m resolution
• Panchromatic
• one meter resolution

21
Department of Geomatics Remote Sensing,
Principles and ApplicationsImaging Systems

• Airborne Systems
• Advantages
• Flexible Timetable
• Resolution determined by altitude
• Large number of bands avaliable
• Disadvantages
• Cost
• Operational complexity