Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
10/01/1995 | 0000 | 05/08/1996 | 1755 | Suspect |
Subject: | SGP/EBBR/E20 - Temperature/RH Probes Malfunction and Replacement |
DataStreams: | sgp15ebbrE20.b1, sgp5ebbrE20.00, sgp5ebbrE20.b1, sgp30ebbrE20.b1 |
Description: | Beginning on approximately October 1, 1996 the calibration of the temperature sensor in one or both T/RH probes began to drift; temperatures started to drift higher than the thermocouple probes. This drift caused the upper and lower temperatures measured by the T/RH probe to be 2 to 10 degrees C greater than the thermocouple probes. Comparison with adjacent EBBR sites shows that the thermocouples were measuring properly. The problem affected the vapor pressure outputs primarily, making them as much as 1 kPa greater than they should be (vapor pressure is calculated from probe temperature and relative humidity). The effect on sensible and latent heat fluxes was negligible, although latent heat flux may be overestimated by about 5% presently and sensible heat flux underestimated by approximately the same percentage. Site operations replaced the T/RH probes on 8 May 1996; the new probes are performing well. The serial numbers of replaced probes are: Left 632415, Right 632356. New probe serial numbers are: Left 460428, Right 460412. |
Suggestions: | |
Measurements: | sgp30ebbrE20.b1: more
sgp15ebbrE20.b1: more sgp5ebbrE20.00: more sgp5ebbrE20.b1: more |