✦ LIBER ✦

Probing tornadoes with a pulse doppler radar

✍ Scribed by D. S. Zrnic; R. J. Doviak; D. W. Burgess; Mr Rodger A. Brown

Publisher: John Wiley and Sons
Year: 1977
Tongue: English
Weight: 782 KB
Volume: 103
Category: Article
ISSN: 0035-9009
DOI: 10.1002/qj.49710343813

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Maximum tornado wind speeds and their radii are deduced by least square fitting of the vortex model velocity spectra to those measured with a pulse Doppler radar. Spectra are analysed from the Stillwater, Oklahoma, 13 June 1975, tornado. Simulated spectra are fitted to those measured for pulse volume gates nearest the vortex, and thus a tornado's position relative to those gates is estimated. Estimated maximum tangential velocity is 92ms^−1^ at an altitude of 630m and 85ms^−1^ at 1.5km; tornado diameter is 300m. the observed spectra have an asymmetry that suggests targets that are centrifuged outwards, with a velocity of 13ms^−1^. One spectrum analysed from the Union City, Oklahoma, 24 May 1974, tornado shows a bimodal shape similar to Stillwater spectra. Deduced maximum velocity is 72ms^−1^ and diameter 200 m.

📜 SIMILAR VOLUMES

Resonant propagation of coherent pulses

Resonant propagation of coherent pulses in a gas with Doppler broadening

✍ Y. Ben-Aryeh; M. Mayseless 📂 Article 📅 1975 🏛 Elsevier Science 🌐 English ⚖ 490 KB

A low-cost Doppler radar system with 24

A low-cost Doppler radar system with 24 GHz PLL for remote detection of heart beat

✍ Jian Zhang; Minghui Yang; Shuqi Zheng; Xiaowei Sun 📂 Article 📅 2008 🏛 John Wiley and Sons 🌐 English ⚖ 584 KB

## Abstract A low‐cost homodyne Doppler radar system with 24.128 GHz phase lock loop (PLL) frequency synthesizer has been designed, fabricated, and applied in remote detection of heart beat. In this direct conversion Doppler radar system, the PLL frequency synthesizer is utilized as a high‐stabilit

Using Doppler radar with a simple explic

Using Doppler radar with a simple explicit microphysics model to diagnose problems with ice sublimation depth-scales in forecast models

✍ Jonathan M. Wilkinson; Robin J. Hogan; Anthony J. Illingworth 📂 Article 📅 2010 🏛 John Wiley and Sons 🌐 English ⚖ 460 KB

## Abstract Several previous studies have attempted to assess the sublimation depth‐scales of ice particles from clouds into clear air. Upon examining the sublimation depth‐scales in the Met Office Unified Model (MetUM), it was found that the MetUM has evaporation depth‐scales 2–3 times larger than

Arterial flow waveforms from pulse oxime

Arterial flow waveforms from pulse oximetry compared with measured Doppler flow waveforms : apparatus

✍ N. A. Wisely; L. B. Cook 📂 Article 📅 2001 🏛 John Wiley and Sons 🌐 English ⚖ 291 KB

This study compared derived arterial flow waveforms, extracted from pulse oximeter waveforms, with Doppler flow waveforms. Fingertip pulse oximeter waveforms and radial artery Doppler flow waveforms were measured simultaneously in volunteers. The pulse oximeter waveforms were processed to extract th

A new 1-MHz probe for transcranial Doppl

A new 1-MHz probe for transcranial Doppler sonography in patients with inadequate temporal bone windows

✍ Christof Klötzsch; Octavian Popescu; Peter Berlit 📂 Article 📅 1998 🏛 Elsevier Science 🌐 English ⚖ 342 KB

Recent large-scale transcranial Doppler sonography (TCD) studies have revealed that, in 3%-5% of patients, the temporal bone window is insufficient for examination with 2-MHz probes. The diagnostic value of a new 1-MHz probe for TCD was compared with a standard 2-MHz probe in patients with an insuff

Postoperative monitoring of lower limb f

Postoperative monitoring of lower limb free flaps with the Cook–Swartz implantable Doppler probe: A clinical trial

✍ Warren M. Rozen; Morteza Enajat; Iain S. Whitaker; Ulrica Lindkvist; Thorir Audo 📂 Article 📅 2009 🏛 John Wiley and Sons 🌐 English ⚖ 150 KB

## Abstract __Background:__ Free flaps to the lower limb have inherently high venous pressures, potentially impairing flap viability, which may lead to limb amputation if flap failure ensues. Adequate monitoring of flap perfusion is thus essential, with timely detection of flap compromise able to p