Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Unit 6 Digby Quiz
Earth From Space Unit 6 Digby Fall 2011
| Question | Answer |
|---|---|
| Reason why Radar and Lidar are called active sensors | They emit energy |
| Development during WWII | Detection of aircraft, all weather day and night imaging, detection of different types of features from those detected by visible light, used to produce DEMs digital elevation models |
| Advantages to using radar | all weather day and night imaging, detection of different types of features from those detected by visible light, used to produce DEMs digital elevation models |
| Backscatter determined by surface roughness | rougher = more backscatter |
| Double bounce effect, surfaces that create this type of energy reflections | Vegetation, buildings |
| Common radar bands | X C L |
| Differences in surface penetration with wavelength | Longer wavelengths penetration is greater |
| Seasat as first civilian satellite | First civilian satellite, operated for 100 days in 1978, great excitement eg strait of georgia image |
| Radarsat as an operational satelllite, meaning of the word operational | |
| Use of radar to distinguish ice types (First year from multi year) | Ridges Ice from open water icebergs ships oil slicks ocean current |
| remote sensing experiments | obtaining insitu data and linking it to data collected from various instruments on platforms at a range of altitudes |
| Surprise findings | Seal breathing holes that create patterns similar to multiyear floes |
| Iceberg detection and difficulties with iceberg detection | |
| Purpose of egg code | gauge ice thickness for navigation |
| Penetration of dry materials by radar | |
| Experiment from the space shuttle | |
| Radar is blocked by water | |
| Ground penetrating radar which is operated at the surface of the ground | uses archaeology, pipes |
| Lake Vostok | A lake suspected but only confirmed by radar data. Possibility of interesting life forms that may give us insight into Europa |
| Radar data | possibility of interesting life froms that may give us insight into Europa |
| Radar interferometery | measurements of change of elevation over time uses... used in volcanic movement, subsidence, surface rupture |
| LIDAR: | Light detection and ranging (laser) like radar time and strength of the returning beam are recorded. |
| Bob Pusey | Lasers combined with cameras can provide measurements of features such as telephone poles and the inside of pipes From the air, LIDAR used to produce 'bald earth images' shown features indicate a post-glaciation fault ruptures the surface in this area. |
Created by:
521040346
Popular Physical Science sets