Applications of radar to meteorological operations and research

Smith, Paul L.; Hardy, Kenneth R.; Glover, Kenneth M.

doi:10.1109/proc.1974.9512

Cited by 14 publications

(4 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The agile-beam phased array system can maximize efficient use of radar resources by employing a visionary scheme proposed by Smith et al (1974). First, the PAR transmits two consecutive pulses in the same direction so that an estimate of autocorrelation and power can be obtained.…”

Section: National Weather Radar Testbedmentioning

confidence: 99%

Agile-Beam Phased Array Radar for Weather Observations

Zrnić¹,

Kimpel²,

Forsyth³

et al. 2007

Bull. Amer. Meteor. Soc.

243

111

View full text Add to dashboard Cite

show abstract

Section: National Weather Radar Testbedmentioning

confidence: 99%

Agile-Beam Phased Array Radar for Weather Observations

Zrnić¹,

Kimpel²,

Forsyth³

et al. 2007

Bull. Amer. Meteor. Soc.

243

111

View full text Add to dashboard Cite

show abstract

“…The mean water content can be written as the sum of the individual means of the terms in the expansion (20):…”

Section: Relationship Between the Magnitude Of The Echo Signalmentioning

confidence: 99%

“…An illustration of such signal might be the echo signal from a radio mast received by weather radar MRL-2 [7] when taking into account the additional distortions of the pulse envelope by the signal path in RUSSIAN the receiver. Since the measurement accuracy of the backscatter power of weather radars is 1-2 dB [20], ignoring the form of the envelope contributes 25% to 50% of the total measurement accuracy error, even for a "minimal" case. In other words, ignoring the envelope shape causes an overestimation of the number of particles actually located in the radar volume.…”

Section: Influence Of the Probing Pulse Form On The Assessment Of Thementioning

confidence: 99%

Effective droplet number and droplet spectra parameters that determine the radar backscatter from clouds and rain

Yurchak

2009

Russ. Meteorol. Hydrol.

View full text Add to dashboard Cite

Using the "slice" approach to the weather radar equation, it was found that, in general, for an imperfect rectangular probing pulse envelope and non-Poisson, small-scale fluctuations of particle concentration, the mean backscatter is governed by the effective droplet number and the first three moments of the cloud-rain particle size distribution function. We propose an approach to computing the effective spatial duration of a probing pulse used to estimate the effective number of scattering particles within a radar volume. We also assessed the difference between methods for estimating mean backscatter, first taking into account the factors listed above and then comparing the result to classical estimations attained through the sixth moment of the droplet spectra and a rectangular probing pulse.

show abstract

“…Koivunen and Kostinski (1999) developed a technique to whiten these signals to improve the power estimates through the increase in the equivalent number of independent samples. During the wait time for signals to become uncorrelated, the radar is tasked with probing other regions to maximize the usage of the radar resources, as suggested in Smith et al (1974). Further, the width of the Gaussian function is not available but is needed a priori.…”

Section: Introductionmentioning

confidence: 99%

Beam Multiplexing Using the Phased-Array Weather Radar

Orescanin

Curtis

et al. 2007

Journal of Atmospheric and Oceanic Technology

View full text Add to dashboard Cite

The recently installed S-band phased-array radar (PAR) at the National Weather Radar Testbed (NWRT) offers fast and flexible beam steering through electronic beam forming. This capability allows the implementation of a novel scanning strategy termed beam multiplexing (BMX), with the goal of providing fast updates of weather information with high statistical accuracy. For conventional weather radar the data acquisition time for a sector scan or a volume coverage pattern (VCP) can be reduced by increasing the antenna's rotation rate to the extent that the pedestal allows. However, statistical errors of the spectral moment estimates will increase due to the fewer samples that are available for the estimation. BMX is developed to exploit the idea of collecting independent samples and maximizing the usage of radar resources. An improvement factor is introduced to quantify the BMX performance, which is defined by the reduction in data acquisition time using BMX when the same data accuracy obtained by a conventional scanning strategy is maintained. It is shown theoretically that a fast update without compromising data quality can be achieved using BMX at small spectrum widths and a high signal-to-noise ratio (SNR). Applications of BMX to weather observations are demonstrated using the PAR, and the results indicate that an average improvement factor of 2-4 can be obtained for SNR higher than 10 dB.

show abstract

Applications of radar to meteorological operations and research

Cited by 14 publications

References 37 publications

Agile-Beam Phased Array Radar for Weather Observations

Agile-Beam Phased Array Radar for Weather Observations

Effective droplet number and droplet spectra parameters that determine the radar backscatter from clouds and rain

Beam Multiplexing Using the Phased-Array Weather Radar

Contact Info

Product

Resources

About