Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Field Campaign Evaluation of Sensors GMX500 and WS100 in Peruvian Central Andes

Version 1 : Received: 5 February 2022 / Approved: 7 February 2022 / Online: 7 February 2022 (12:51:55 CET)

A peer-reviewed article of this Preprint also exists.

Valdivia, J.M.; Guizado, D.A.; Flores-Rojas, J.L.; Gamarra, D.P.; Silva-Vidal, Y.F.; Huamán, E.R. Field Campaign Evaluation of Sensors Lufft GMX500 and MaxiMet WS100 in Peruvian Central Andes. Sensors 2022, 22, 3219. Valdivia, J.M.; Guizado, D.A.; Flores-Rojas, J.L.; Gamarra, D.P.; Silva-Vidal, Y.F.; Huamán, E.R. Field Campaign Evaluation of Sensors Lufft GMX500 and MaxiMet WS100 in Peruvian Central Andes. Sensors 2022, 22, 3219.

Journal reference: Sensors 2022, 22, 3219
DOI: 10.3390/s22093219

Abstract

The research presents the inter-comparison of atmospheric variables measured by 9 automatic meteorological stations. This set of data was compared with the measurements of other meteorological stations in order to standardize the values that must be adjusted when taken to different areas. The data of a set of a total of 9 GMX500, which measures conventional meteorological variables, and 10 WS100 sensors, which measures precipitation parameters. The automatic stations were set up at the Huancayo Observatory (Geophysical Institute of Peru) for a period of 5 months. The data set of GMX500 were evaluated comparing with the average of the 9 sensors and the WS100 was compared with a optical disdrometer Parsivel2. The temperature, pressure, relative humidity, wind speed, rainfall rate, and drop size distribution was evaluated. A pair of GMX500 sensors presented high data dispersion, it was found found that the errors came from a bad configuration; once this problem was solved, good agreement was archived, with low RMSE and high correlation. I was found that the WS100 sensors overestimate the precipitation with a percent bias close to 100% and the differences increase with the greater intensity of rain. The DSD retrieved by WS100 have unrealistic behavior with higher concentrations in diameters of 1 mm and 5 mm, in addition to a flattened curve.

Keywords

Meteorological instruments; Drop size distribution; DSD; Huancayo Observatory; Peruvian Central Andes

Subject

EARTH SCIENCES, Atmospheric Science

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