On the Use of a 77 GHz Automotive Radar as a Microwave Rain Gauge
The European Telecommunications Standards Institute (ETSI) defines the frequency band of 77 GHz (W-band) as the one dedicated to automatic cruise control long-range radars. A car can be thought as a moving integrated weather sensor since it can provide meteorological information exploiting the sensors installed on board. This work presents the preliminary analysis of how a 77 GHz mini radar can be used as a short range microwave rain gauge. After the discussion of the Mie scattering formulation applied to a microwave rain gauge working in the W-band, the proposal of a new Z-R equation to be used for correct rain estimation is given. Atmospheric attenuation and absorption are estimated taking into account the ITU-T recommendations. Functional requirements in adapting automatic cruise control long-range radar to a microwave rain gauge are analyzed. The technical specifications are determined in order to meet the functional requirements.
Keywords:radar, microwave rain gauge, 77 GHz, W-band, Mie scattering, Z-R relation, weather radar, car as sensor
W. J. Fleming, “Overview of automotive sensors”, IEEE Sensors Journal, Vol. 1, No. 4, pp. 296-308, 2001 DOI: https://doi.org/10.1109/7361.983469
U. Haberlandt, M. Sester, “Areal rainfall estimation using moving cars as rain gauges – a modelling study”, Hydrology and Earth System Sciences, Vol. 14, pp. 1139-1151, 2010 DOI: https://doi.org/10.5194/hess-14-1139-2010
C. Lucianaz, O. Rorato, M. Allegretti, M. Mamino, M. Roggero, F. Diotri, “Low cost DGPS wireless network”, IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications, pp. 792-795, 2011 DOI: https://doi.org/10.1109/APWC.2011.6046798
S. Bertoldo, L. Corgnati, A. Losso, G. Perona, “Safety in forest fire fighting action: A new radiometric model to evaluate the safety distance for firemen working with hand-operated systems”, WIT Transactions on Ecology and the Environment, Vol. 158, pp. 3-12, 2012 DOI: https://doi.org/10.2495/FIVA120011
A. A. Khamukhin, S. Bertoldo, “Spectral analysis of forest fire noise for early detection using wireless sensor networks International Siberian Conference on Control and Communications, pp 1-4, 2016 DOI: https://doi.org/10.1109/SIBCON.2016.7491654
O. Rorato, C. Lucianaz, S. Bertoldo, M. Allegretti, G. Perona, “A multipurpose node for low cost wireless sensor network”, IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications, pp. 247-250, 2012 DOI: https://doi.org/10.1109/APWC.2012.6324911
G. Greco, C. Lucianaz, S. Bertoldo, M. Allegretti, “A solution for monitoring operations in harsh environment: A RFID reader for small UAV”, International Conference on Electromagnetics in Advanced Applications, pp. 859-862, 2015 DOI: https://doi.org/10.1109/ICEAA.2015.7297235
S. Shah, R. Notarpietro, S. Bertoldo, M. Branca, C. Lucianaz, O. Rorato, M. Allegretti, “Automatic Storm(s) Identification in High Resolution, Short Range, X-Band Radar Images”, International Conference on Electromagnetics in Advanced Applications, pp. 945-948, 2013 DOI: https://doi.org/10.1109/ICEAA.2013.6632379
S. Bertoldo, M. Allegretti, G. Greco, C. Lucianaz, “Extreme rain events analysis using X-band weather radar”, International Conference on Electromagnetics in Advanced Applications, pp. 157-160, 2015 DOI: https://doi.org/10.1109/ICEAA.2015.7297094
F. Versluis, “Millimetre wave radio technology”, Microwave Engineering Europe, 2008
The ITU Radiocommunication Assembly, “Recommendation ITU-R P.676-6, Attenuation by atmospheric gases”, available at: https://www.itu.int/rec/R-REC-P.676-6-200503-S/en, 2005
The ITU Radiocommunication Assembly, “Recommendation ITU-R P.838-3, Specific attenuation model for rain for use in prediction methods”, available at https://www.itu.int/rec/R-REC-P.838-3-200503-I/en, 2005
J. Marshall, W. Palmer “The distribution of raindrops with size”, Journal of Meteorology, Vol. 5, pp. 165-166, 1948 DOI: https://doi.org/10.1175/1520-0469(1948)005<0165:TDORWS>2.0.CO;2
R. Gunn, G. D. Kinzer, “The terminal velocity of fall for waterdrops in stagnant air”, Journal of Meteorology, Vol. 6, pp. 243-248, 1949 DOI: https://doi.org/10.1175/1520-0469(1949)006<0243:TTVOFF>2.0.CO;2
L. J. Battan, Radar Observation of the atmosphere, University of Chicago Press, 1973
U. N. Rao, A. Sarkar, M. Mohan, “Theoretical Z-R relationship for precipitating systems using Mie scattering approach”, Indian Journal of Radio and Space Sciences, Vol. 34, No. 3, pp. 191-196, 2005
K. Arai, X. M. Liang, Q. Liu, “Method for estimation of rain rate with Rayleigh and Mie scattering assumptions on the Z–R relationship for different rainfall types”, Advances in Space Research, Vol. 36, No. 5, pp. 813–817, 2005 DOI: https://doi.org/10.1016/j.asr.2005.04.102
C. Matzler, “MATLAB Functions for Mie Scattering and Absorption”, Research Report No. 2002-08, June 2002, Institute of Applied Physics, University of Bern, 2002
C. Matzler, “Effects of Rain on Propagation, Absorption and Scattering of Microwave Radiation Based on the Dielectric Model of Liebe, Research Report No. 2002-10, June 2002”, Institute of Applied Physics, University of Bern, 2002
C. F. Bohren, D. R. Huffman, Absorption and scattering of light by small particles, Wiley, 1983
H. J. Liebe, G. A. Hufford, T. Manabe, “A model for the permittivity of water at frequencies below 1 THz”, International Journal of Infrared and Millimeter Waves, Vol. 12, No. 7, pp. 659–675, 1991 DOI: https://doi.org/10.1007/BF01008897
R. Wexler, D. Atlas, “Radar Reflectivity and Attenuation of Rain”. Journal of Applied Meteorology, Vol. 2, pp. 276-280, 1962 DOI: https://doi.org/10.1175/1520-0450(1963)002<0276:RRAAOR>2.0.CO;2
V. N. Bringi, V. Chandrasekar, Polarimetric Doppler Weather Radar: Principles and Applications. Cambridge University Press, 2002 DOI: https://doi.org/10.1017/CBO9780511541094
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