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Questions and Answers
What do microwave radiometers measure?
What do microwave radiometers measure?
- Wind speed
- The thermal radiation of the atmosphere (correct)
- Scatterometer design
- Microwave altimeter
What can be inferred from microwave radiometer measurements?
What can be inferred from microwave radiometer measurements?
- Scatterometer design
- Temperature profiles of the lower troposphere (correct)
- Microwave altimeter design
- Wind speed measurement
What is typically not sensitive to?
What is typically not sensitive to?
- Liquid-water content
- Thermal radiation of ice (correct)
- Water-vapor content
- Scatterometer design
What type of clouds can be investigated using microwave radiometers?
What type of clouds can be investigated using microwave radiometers?
What is measured by the microwave radiometer to provide information about the atmosphere?
What is measured by the microwave radiometer to provide information about the atmosphere?
What is required for microwave radiometers to measure the emission of microwave radiation?
What is required for microwave radiometers to measure the emission of microwave radiation?
What can be measured using microwave radiometers when appropriate detection frequencies are used?
What can be measured using microwave radiometers when appropriate detection frequencies are used?
What is not retrieved from microwave radiometer measurements?
What is not retrieved from microwave radiometer measurements?
What is the purpose of microwave radiometers in the context of cloud research?
What is the purpose of microwave radiometers in the context of cloud research?
What is the name of the organization that provides information about microwave radiometers?
What is the name of the organization that provides information about microwave radiometers?
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Study Notes
Microwave Scatterometers
- Used for monitoring sea ice and detecting land contamination.
- QuikScat scatterometer is a key example in the study of ocean and atmospheric phenomena.
Microwave Altimeters
- Altimeters, also known as altitude meters, measure an object's height above a stable reference point.
- The process of measuring altitude is termed altimetry, while bathymetry deals with depth below sea level.
- Operating principle involves transmitting microwave pulses, measuring the round-trip time to calculate distance from the sensor to the surface.
- Current and future radar altimeters are crucial for observing trends in Earth's ice masses, particularly for assessing Arctic sea ice changes linked to global warming.
- Satellite altimetry aids in mapping sea surface wind speeds and significant wave heights, which are essential for weather forecasting and climate studies.
Microwave Radiometers
- Measure thermal radiation of the atmosphere to ascertain water vapor and liquid water content.
- Provide temperature profiles of the lower troposphere, aiding in understanding atmospheric conditions.
- Limited sensitivity to thermal radiation of ice, focusing on retrieving data regarding water vapor and liquid water, important for studying mixed-phase clouds.
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