PPT Slide
Aneroid Barometer
Errors of Aneroid
Hysteresis is usually unimportant for station pressures do to small changes that occur.
B. Indirect Pressure Measuring Instruments
Where: L = Heat of Vaporization of Liquid
More Indirect Pressuring Measuring Instruments
3. Piezoresistive Barometer
Strain Gauge Barometer
4. Variable Capacitance Barometer
ASOS - Automated Surface Observing System
ASOS Pressure Sensor
Every 10 seconds a measurement is made and used to compute a 1-minute average. Lowest 1-minute sensor pressure value obtained from a pair of sensors whose difference is 0.04 inch or less is the designated pressure to be reported and is used to determine other derived pressure values using various algorithms.
Email: alcorn@ariel.met.tamu.edu
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