Browsing Journal of Atmospheric and Oceanic Technology by Title

Now showing items 1-20 of 5084

      • 1280-MHz Active Array Radar Wind Profiler for Lower Atmosphere: System Description and Data Validation 

        Srinivasulu, P.; Yasodha, P.; Kamaraj, P.; Rao, T. N.; Jayaraman, A.; Reddy, S. N.; Satyanarayana, S. (American Meteorological Society, 2012)
        n L-band radar wind profiler was established at National Atmospheric Research Laboratory, Gadanki, India (13.5°N, 79.2°E), to provide continuous high-resolution wind measurements in the lower atmosphere. This system utilizes ...

      • 35-GHz Dual-Polarization Propagation Link for Rain-Rate Estimation 

        Ruf, Christopher S.; Aydin, Kultegin; Mathur, Savyasachee; Bobak, Justin P. (American Meteorological Society, 1996)
        A 35-GHz dual-polarization propagation link (DPPL) is described and initial measurements are presented. The instrument is essentially a small, low-power, portable, dual linearly polarized pulsed radar that provides ...

      • 3D Convective Storm Identification, Tracking, and Forecasting—An Enhanced TITAN Algorithm 

        Han, Lei; Fu, Shengxue; Zhao, Lifeng; Zheng, Yongguang; Wang, Hongqing; Lin, Yinjing (American Meteorological Society, 2009)
        Storm identification, tracking, and forecasting make up an essential part of weather radar and severe weather surveillance operations. Existing nowcasting algorithms using radar data can be generally classified into two ...

      • 3D Sonar Measurements in Wakes of Ships of Opportunity 

        Soloviev, Alexander; Maingot, Christopher; Agor, Mike; Nash, Lou; Dixon, Keith (American Meteorological Society, 2012)
        he aim of this work is to test the potential capabilities of 3D sonar technology for studying small-scale processes in the near-surface layer of the ocean, using the centerline wake of ships of opportunity as the object ...

      • 3D Turbulence Measurements Using Three Synchronous Wind Lidars: Validation against Sonic Anemometry 

        Fuertes, Fernando Carbajo; Iungo, Giacomo Valerio; Porté-Agel, Fernando (American Meteorological Society, 2014)
        his paper presents a technique to measure the time series of the three components of the wind vector at a point in space from synchronous measurements of three scanning Doppler wind lidars. Knowing the position of each ...

      • 3D Volumetric Analysis of Wind Turbine Wake Properties in the Atmosphere Using High-Resolution Doppler Lidar 

        Banta, Robert M.; Pichugina, Yelena L.; Brewer, W. Alan; Lundquist, Julie K.; Kelley, Neil D.; Sandberg, Scott P.; Alvarez II, Raul J.; Hardesty, R. Michael; Weickmann, Ann M. (American Meteorological Society, 2015)
        ind turbine wakes in the atmosphere are three-dimensional (3D) and time dependent. An important question is how best to measure atmospheric wake properties, both for characterizing these properties observationally and for ...

      • 3D Wind Field Retrieval Applied to Snow Events Using Doppler Radar 

        Nissen, Robert; Hudak, David; Laroche, Stéphane; de Elía, Ramón; Zawadzki, Isztar; Asuma, Yoshio (American Meteorological Society, 2001)
        The variational analysis method of Laroche and Zawadzki for the retrieval of the 3D wind field from single?Doppler radar data is adapted to analyze stratiform snow events. Modifications include prefiltering of noisy radial ...

      • 95-GHz Polarimetric Radar Measurements of Orographic Cap Clouds 

        Pazmany, Andrew; Mead, James; McIntosh, Robert; Hervig, Mark; Kelly, Robert; Vali, Gabor (American Meteorological Society, 1994)
        The use of millimeter-wavelength radars for cloud microphysical research was investigated in experiments at the Elk Mountain Observatory near Laramie, Wyoming, between April 1990 and March 1992. The 95-GHz polarimetric ...

      • A 10-Year Comparison of Water Levels Measured with a Geodetic GPS Receiver versus a Conventional Tide Gauge 

        Larson, Kristine M.;Ray, Richard D.;Williams, Simon D. P. (American Meteorological Society, 2016)
        AbstractA standard geodetic GPS receiver and a conventional Aquatrak tide gauge, collocated at Friday Harbor, Washington, are used to assess the quality of 10 years of water levels estimated from GPS sea surface reflections. ...

      • A 1D Var retrieval of relative humidity using the ERA5 dataset for the assimilation of Raman lidar measurements 

        Gamage, S. Mahagammulla;Sica, R. J.;Martucci, G.;Haefele, A. (American Meteorological Society, 2020)
        We present a 1-dimensional-variational (1D Var) retrieval of fifth generation European Centre for Medium-range Weather Forecast Re-Analysis (ERA5) temperature and relative humidity profiles above Payerne, Switzerland, ...

      • A 1D-Var Approach to Retrieve Clear-Sky Wet Tropospheric Correction from Current and Future Altimetry Missions 

        Hermozo, Laura; Eymard, Laurence; Karbou, Fatima; Picard, Bruno; Pardé, Mickael (American Meteorological Society, 2019)
        AbstractStatistical methods are usually used to provide estimations of the wet tropospheric correction (WTC), necessary to correct altimetry measurements for atmospheric path delays, using brightness temperatures measured ...

      • A 3-GHz Profiler for Precipitating Cloud Studies 

        Ecklund, Warner L.; Williams, Christopher R.; Johnston, Paul E.; Gage, Kenneth S. (American Meteorological Society, 1999)
        A 3-GHz profiler has been developed by the National Oceanic and Atmospheric Administration?s Aeronomy Laboratory to observe the evolution and vertical structure of precipitating cloud systems. The profiler is very portable, ...

      • A 35-GHz Polarimetric Doppler Radar for Long-Term Observations of Cloud Parameters—Description of System and Data Processing 

        Görsdorf, Ulrich; Lehmann, Volker; Bauer-Pfundstein, Matthias; Peters, Gerhard; Vavriv, Dmytro; Vinogradov, Vladimir; Volkov, Vadim (American Meteorological Society, 2015)
        35-GHz radar has been operating at the Meteorological Observatory Lindenberg (Germany) since 2004, measuring cloud parameters continuously. The radar is equipped with a powerful magnetron transmitter and a high-gain antenna ...

      • A 35-GHz Scanning Doppler Radar for Fog Observations 

        Hamazu, Kyosuke; Hashiguchi, Hiroyuki; Wakayama, Toshio; Matsuda, Tomoya; Doviak, Richard J.; Fukao, Shoichiro (American Meteorological Society, 2003)
        To observe fog, a 35-GHz scanning Doppler radar was designed, assembled, and tested. The radar, mounted on a flatbed vehicle for portability, transmits peak powers of 100 kW in a pulse of 0.5-µs width and a beamwidth of ...

      • A 50-MHz Logarithmic Amplifier for Use in Lidar Measurements 

        Lienert, Barry; Porter, John; Ahlquist, Norman; Harris, David; Sharma, Shiv (American Meteorological Society, 2002)
        A high-speed logarithmic amplifier that has been successfully used to improve the dynamic range of a scanning lidar is described. The amplifier incorporates built-in baseline correction and calibration circuits, allowing ...

      • A 94-GHz Cloud Radar System on a NASA High-Altitude ER-2 Aircraft 

        Li, Lihua; Heymsfield, Gerald M.; Racette, Paul E.; Tian, Lin; Zenker, Ed (American Meteorological Society, 2004)
        The 94-GHz (W band) Cloud Radar System (CRS) has been developed and flown on a NASA ER-2 high-altitude (20 km) aircraft. The CRS is a fully coherent, polarimetric Doppler radar that is capable of detecting clouds and ...

      • A 94-GHz Doppler Radar for Cloud Observations 

        Lhermitte, Roger (American Meteorological Society, 1987)
        A Doppler radar operating at 3.2 mm wavelength was designed and assembled primarily for observation of clouds and precipitation. Phase detection of the radar signals which is required for Doppler operation is implemented ...

      • A Balloon Sounding Technique for Measuring SO2 Plumes 

        Morris, Gary A.; Komhyr, Walter D.; Hirokawa, Jun; Flynn, James; Lefer, Barry; Krotkov, Nicholay; Ngan, Fong (American Meteorological Society, 2010)
        This paper reports on the development of a new technique for inexpensive measurements of SO2 profiles using a modified dual-ozonesonde instrument payload. The presence of SO2 interferes with the standard electrochemical ...

      • A Balloon-Borne Continuous Cloud Particle Replicator for Measuring Vertical Profiles of Cloud Microphysical Properties: Instrument Design, Performance, and Collection Efficiency Analysis 

        Miloshevich, Larry M.; Heymsfield, Andrew J. (American Meteorological Society, 1997)
        The performance of a balloon-borne Formvar replicator that measures continuous profiles of cloud microphysical properties is investigated. The replicator measures the small particles (<100-?m diameter) that are undetectable ...

      • A Balloon-Borne Instrument for Measuring the Charge and Size of Precipitation Particles inside Thunderstorms 

        Bateman, Monte G.; Rust, W. David; Marshall, Thomas C. (American Meteorological Society, 1994)
        A new balloon-borne instrument created by the authors and referred to as the q-d instrument that measures the charge q and size d of precipitation particles is discussed. The instrument measures charge with an induction ...