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Air Temperature (1.5 m)
The 5-minute average air temperature at a height of 1.5 meters above
the ground.
- This sensor is quite rugged and accurate. However, power
and cost limitations dictated using an unaspirated radiation
shield. Unfortunately, such shields can create temperature
errors of several degrees Celsius when the wind is calm (less
than 1 m/sec) and radiation is strong (more than 800 Watts
per square meter). Radiation at high sun angles near 70 degrees
seem to induce the worst errors.
| Type |
Sensor Used |
Standard Units |
Accuracy |
| Standard - Primary |
Thermometrics
Fast Air Temperature
2004-Present; PDF
Vaisala HMP35C
1994-2003 |
degrees Celsius |
± 0.5 ºC when windspeed is >
6 m/s |
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± 1.0 ºC when windspeed is
3 - 6 m/s |
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± 1.5 ºC when windspeed is 2 -
3 m/s |
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± 3.0 ºC when windspeed is 1 -
2 m/s |
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