Abstract
A dealiasing algorithm for radar radial velocity observed by C-band Doppler radars is presented as an extension of an existing S-band dealiasing algorithm. This has operational significance in that many portable and many commercial broadcast radars, as well as approximately one half of the Chinese weather radar network (CINRAD), are C-band radars. With a wavelength of about 5 cm, the Nyquist interval of C-band radars is just about one half that of S-band radars (wavelength of about 10 cm) and thus has more velocity folding. The proposed algorithm includes seven modules to remove noisy data, find the starting radials, dealias velocities, and apply least squares error checking in both the radial and azimuth directions. The proposed velocity dealiasing method was applied to one widespread rain case and three strong convective cases from radars operating in China. It was found that, on average, 92.95% of the aliased radial velocity data could be correctly de-aliased by the algorithm, resulting in 96.65% of the data being valid.
Similar content being viewed by others
References
Doviak, R., S. Sirmans, D. Zrnic, and G. G. Walker, 1976: Resolution of pulse-Doppler radar band and velocity ambiguities in severe storms. Preprints, 17 Radar Meteor. Conf., Seattle, Wash., Amer. Meteor. Soc., 278–283.
Eits, M. D., and S. D. Smith, 1990: Efficient dealiasing of Doppler velocities using local environment constraints. J. At mos. Oceanic. Soc., 7, 118–128.
Hawkins, F. H., and T. Rubsam, 1968: Hurrican Hilda, II. Structure and budgets of the hurricane on October 1, 1964. Mon. Wea. Rev., 96, 617–636.
He, G., G. Li, X. Zou, and P. S. Ray, 2012a: Applications of a velocity dealiasing scheme to data from China’s new generation weather radar system (CINRAD). Wea. Forecasting, 27(1), 218–230.
He, G., G. Li, X. Zou, and P. S. Ray, 2012b: A velocity dealiasing scheme for synthetic C-band data from China’s new generation weather radar System (CINRAD). J. Atmos. Oceanic. Technol., 29 (9), 1263–1274.
Holleman, I., and H. Beekhuis, 2003: Analysis and correction of dual PRF velocity data. J. Atmos. Oceanic Technol., 30, 443–453.
James, C. N., and R. Houze, 2001: A real-time four-dimensional Doppler dealiasing scheme. J. Atmos. Oceanic Technol., 18, 1674–1683.
Mapes, B. E., and J. Lin, 2005: Doppler radar observations of mesoscale wind divergence in regions of tropical convection. Mon. Wea. Rev., 133, 1808–1824.
Oye, R., C. Mueller, and S. Smith, 1995: Software for radar translation, visualization, editing and interpolation. Preprints, 27th Conf. On Radar Meteorology, Vail, AMS, 359–363.
Ray, P. S., and C.I Ziegler, 1977: Dealiasing First-moment Doppler Estimates. J. Appl. Meteor., 16, 563–564.
Rossa, A., 2005: Use of radar observations in hydrological and NWP models: Final Report, Cost Action 717. Luxembourg, CEC, 147–149.
Zhang, J., and S. Wang, 2006: An automated 2D multi-pass Doppler radar velocity dealiasing scheme. J. Atmos. Oceanic Technol., 23, 1239–1248.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Li, G., He, G., Zou, X. et al. A velocity dealiasing scheme for C-band weather radar systems. Adv. Atmos. Sci. 31, 17–26 (2014). https://doi.org/10.1007/s00376-013-2251-8
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00376-013-2251-8