Vol. 34, issue 10, article # 9

Abstract:

A review of methods for calibrating optical raingauges is carried out. The disadvantages of the existing calibration methods of the optoelectronic raingauge OPTIOS are analyzed and the ways to eliminate them are proposed. The original patented method for calibrating the optical raingauge is described in detail, which makes it possible to increase the accuracy of determining the dimensions of hydrometeors by taking into account the effective size of each photosensitive element of the linear sensor. A conclusion is made about the reliability of the proposed calibration method, which makes it possible to use the method to improve the accuracy of any optical meters of linear dimensions of various objects using a linear array of photosensitive elements as a measuring transducer.

Keywords:

optical precipitation gauge, calibration, drop size, optical meter of linear dimensions

References:

1. Kruger A., Krajewski W.F. Two-dimensional video disdrometer: A description // J. Atmos. Ocean. Technol. 2002. V. 19, N 5. P. 602–617.
2. Mocholí Belenguer F., Martínez-Millana A., Mocholí Salcedo A., Milián Sánchez V., Josefa Palomo Anaya M. Disdrometer performance optimization for use in urban settings based on the parameters that affect the measurements // Symmetry. 2020. V. 12, N 2. P. 303. DOI: 10.3390/sym12020303.
3. Loffler-Mang M., Joss J. An optical disdrometer for measuring size and velocity of hydrometeors // J. Atmos. Ocean. Technol. 2000. V. 17, N 2. P. 130–139.
4. Barthazy E., Goke S., Schefold R., Hogl D. An optical array instrument for shape and fall velocity measurements of hydrometeors // J. Atmos. Ocean. Technol. 2004. V. 21, N 9. P. 1400–1416.
5. Kal’chikhin V.V., Kobzev A.A., Korol’kov V.A., Tikhomirov A.A. Determination of the rate of fall of rain drops in measurements of their parameters by an optical rain gauge // Meas. Tech. 2017. V. 59, N 11. P. 1175–1180.
6. Newman A.J., Kucera P.A., Bliven L.F. Presenting the Snowflake Video Imager (SVI) // J. Atmos. Ocean. Technol. 2009. V. 26, N 2. P. 167–179. DOI: 10.1175/ 2008JTECHA1148.1.
7. Garrett T.J., Fallgatter C., Shkurko K., Howlett D. Fall speed measurement and high-resolution multi-angle photography of hydrometeors in free fall // Atmos. Meas. Tech. 2012. N 5. P. 2625–2633.
8. Connolly P.J., Flynn M.J., Ulanowski Z., Choularton T.W., Gallagher M.W., Bower K.N. Calibration of the cloud particle imager probes using calibration beads and ice crystal analogs: the depth of field // J. Atmos. Ocean. Technol. 2007. V. 24, N 11. P. 1860–1879. DOI: 10.1175/JTECH2096.1.
9. Lanzinger E., Theel M., Windolph H. Rainfall amount and intensity measured by the Thies Laser Precipitation Monitor. Research gate, January 2006 [Electronic recourse]. URL: https://researchgate.net/publication/ 229048951 (last access: 21.07.2021).
10. Azbukin A.A., Kalchikhin V.V., Kobzev A.A., Korolkov V.A., Tikhomirov A.A. Opredelenie kalibrovochnyh harakteristik optiko-elektronnogo izmeritelya atmosfernyh osadkov // Optika atmosf. i okeana. 2014. V. 27, N 5. P. 449–455; Azbukin A.A., Kalchikhin V.V., Kobzev A.A., Korolkov V.A., Tikhomirov A.A. Determination of calibration parameters of an optoelectronic precipitation gage // Atmos. Ocean. Opt. 2014. V. 27, N 4. P. 432–437.
11. Litvinov I.V. Struktura atmosfernyh osadkov. L.: Gidrometeoizdat, 1974. 154 p.
12. Kal'chihin V.V., Kobzev A.A., Tihomirov A.A., Filatov D.E. Optimizatsiya protsedury kalibrovki optiko-elektronnogo izmeritelya atmosfernyh osadkov // Optika atmosf. i okeana. 2021. V. 34, N 7. P. 535–538.
13. Sposob kalibrovki opticheskogo izmeritelya osadkov. Pat. 2617033 RF. MPK G 01 W 1/14. Azbukin A.A., Kal'chihin V.V., Kobzev A.A., Korol'kov V.A., Tihomirov A.A.; In-t monitoringa klimaticheskih i ekologicheskih sistem; Sibanalitpribor. N 2016108180; Zayavl. 09.03.2016; Opubl. 19.04.2017. Byul. N 8.
14. Sposob poelementnoj kalibrovki opticheskogo izmeritelya linejnyh razmerov. Pat. 269874 РФ. MPK G 01 W 1/14. Kal'chihin V.V., Kobzev A.A.; In-t monitoringa klimaticheskih i ekologicheskih sistem. N 2018145140; Zayavl. 18.12.2018; Opubl. 29.08.2019. Byul. N 25.