1
Q
Which methods of EO are quite complementary?
A
- SAR and Optical are complimentary means of info extraction
- Data fusion techniques and fused information produces is growing area of research
- Fusion gives structure and colour information
2
Q
How are SAR Missions defined?
A
- According to Frequency band and Polarization
- Single frequency, exception are shuttle missions
3
Q
Why do SAR’s only have one frequency?
A
- Multi-freq would require multiple antennas
- Antennas would be very a large (not practical) and interfere
4
Q
Sentinel-1 Data provision
A
- Free and open access
- European Space Agency (ESA)
5
Q
Applications
A
- Wind speed (but not direction)
- Oil spill detection
6
Q
Oil Spill Detection
A
- Simplest methods based on detection of zones where ocean surface waves are damped by viscous oil slick
- Wind-waves = high BS
- Oil slick = low BS
7
Q
Deep Water Horizon Oil Spill
A
- SAR useful for oil slick detection b/c smoke from fire doesn’t interfere with BS like w/ optical
- Gulf is also often cloudy, not an issue for SAR
8
Q
Oil Spill Detection Limitations
A
- Sheltered harbours and waters in wind shadows are also smooth
- Anthropogenic and biogenic oil slicks cannot be discriminated
