Articles | Volume 8, issue 3
Research article
28 Mar 2015
Research article |  | 28 Mar 2015

Performance of WVSS-II hygrometers on the FAAM research aircraft

A. K. Vance, S. J. Abel, R. J. Cotton, and A. M. Woolley

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Cited articles

Abel, S. J., Cotton, R. J., Barrett, P. A., and Vance, A. K.: A comparison of ice water content measurement techniques on the FAAM BAe-146 aircraft, Atmos. Meas. Tech., 7, 3007–3022,, 2014.
Baker, R., Curtis, R., Helms, D., Homans, A., and Ford, B.: Studies of the effectiveness of the water vapor sensing system, WVSS-II, in supporting airline operations and improved air traffic capacity, 91st American Meteorological Society Annual Meeting, Seattle, WA, 22–27 January 2011.
Bedka, S., Petersen, R., Feltz, W., and Olson, E.: Evaluation of the WVSS-II Sensor Using Co-located In-situ and Remotely Sensed Observations, 7th International Symposium on Tropospheric Profiling: Needs and Technologies, Boulder, CO, 11–17 June 2006, available at: (last access: 16 December 2014), 2006.
Brown, P. R. A. and Francis, P. N.: Improved measurement of the ice water content in cirrus using a total-water probe, J. Atmos. Ocean. Tech., 12, 410–414, 1995.
FAAM: Buck CR2, available at: (last access: 16 December 2014), 2014a.
Short summary
Comparisons on the FAAM BAe 146-301 aircraft show good agreement between chilled mirror hygrometers and a WVSS-II fed from a modified Rosemount inlet (wvssR) in coud-free conditions, but a WVSS-II fed from the standard flush inlet (wvssF) over-reads, except at higher humidities. Case studies in cloudy conditions show that wvssF is immune to liquid water and ice, whilst wvssR is susceptible to both. Both WVSS-II inlets respond much more rapidly than the chilled mirror devices, especially wvssF.