Zobrazeno 1 - 10
of 41
pro vyhledávání: '"John Hubbert"'
Improving Signal Statistics Using a Regression Ground Clutter Filter. Part 1: Theory and Simulations
Publikováno v:
Journal of Atmospheric and Oceanic Technology.
Ground clutter filtering is an important and necessary step for quality control of ground-based weather radars. In this two-part paper ground clutter mitigation is addressed using a time-domain regression filter. Clutter filtering is now widely accom
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ac0c1b36994f430d0b09f1626a2d5ac3
https://doi.org/10.1175/jtech-d-20-0026.1
https://doi.org/10.1175/jtech-d-20-0026.1
Autor:
John Hubbert, Michael Frech
Publikováno v:
Atmospheric Measurement Techniques, Vol 13, Pp 1051-1069 (2020)
It is a challenge to calibrate differential reflectivity ZDR to within 0.1–0.2 dB uncertainty for dual-polarization weather radars that operate 24∕7 throughout the year. During operations, a temperature sensitivity of ZDR larger than 0.2 dB o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::326f9e9b5fe021fe0e0e8a054c632c05
https://www.atmos-meas-tech.net/13/1051/2020/
https://www.atmos-meas-tech.net/13/1051/2020/
Publikováno v:
Bulletin of the American Meteorological Society. 99:2045-2060
The National Center for Atmospheric Research (NCAR) operates a state-of-the-art S-band dual-polarization Doppler radar (S-Pol) for the National Science Foundation (NSF). This radar has some similar and some distinguishing characteristics to the Natio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2a3ffe9553b6c3e4a525567c19721500
https://doi.org/10.1175/bams-d-17-0317.1
https://doi.org/10.1175/bams-d-17-0317.1
Autor:
John Hubbert
Publikováno v:
Journal of Atmospheric and Oceanic Technology. 34:1885-1906
Temporal differential reflectivity bias variations are investigated using the National Center for Atmospheric Research (NCAR) S-band dual-polarization Doppler radar (S-Pol). Using data from the Multi-Angle Snowflake Camera-Ready (MASCRAD) Experiment,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6111b00bf2f2fb45a87064d5a60daa33
https://doi.org/10.1175/jtech-d-16-0218.1
https://doi.org/10.1175/jtech-d-16-0218.1
Autor:
Frank D. Marks, Allen B. White, Sergey Y. Matrosov, Jothiram Vivekanandan, John Hubbert, Joseph J. Cione, Michael M. Bell, Robert A. Black, Evan A. Kalina, David E. Kingsmill
Publikováno v:
Journal of Applied Meteorology and Climatology. 56:1383-1404
Dual-polarization scanning radar measurements, air temperature soundings, and a polarimetric radar-based particle identification scheme are used to generate maps and probability density functions (PDFs) of the ice water path (IWP) in Hurricanes Arthu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e318029caf463531430138d7769e284e
https://doi.org/10.1175/jamc-d-16-0300.1
https://doi.org/10.1175/jamc-d-16-0300.1
Autor:
Michael Frech, John Hubbert
It is a challenge to calibrate differential reflectivity ZDR to within 0.1–0.2 dB uncertainty for dual-polarization weather radars that operate operationally 24/7 throughout the year. During operations, a temperature sensitivity of ZDR larger than
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::19cc7feaab300bf8bee69089315f9ec4
https://doi.org/10.5194/amt-2019-288
https://doi.org/10.5194/amt-2019-288
Publikováno v:
Journal of Applied Meteorology and Climatology. 53:1678-1695
In this paper, experimental X-band polarimetric radar data from simultaneous transmission of horizontal (H) and vertical (V) polarizations (SHV) are shown, modeled, and microphysically interpreted. Both range–height indicator data and vertical-poin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b83b5fbe04794d0e99a1db78876b147c
https://doi.org/10.1175/jamc-d-13-0360.1
https://doi.org/10.1175/jamc-d-13-0360.1
Publikováno v:
Journal of Applied Meteorology and Climatology. 53:1659-1677
Data collected by the National Center for Atmospheric Research S-band polarimetric radar (S-Pol) during the Terrain-Influenced Monsoon Rainfall Experiment (TiMREX) in Taiwan are analyzed and used to infer storm microphysics in the ice phase of convec
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::85fd002aeee2490e4d17d8bc15abd8c7
https://doi.org/10.1175/jamc-d-13-0158.1
https://doi.org/10.1175/jamc-d-13-0158.1
Publikováno v:
Journal of Atmospheric and Oceanic Technology. 27:1583-1598
In this two-part paper the biases of polarimetric variables from simultaneous horizontally and vertically transmitted (SHV) data are investigated. Here, in Part I, a radar-scattering model is developed and antenna polarization errors are investigated
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a190f77998e386608a4bd022aecaec45
https://doi.org/10.1175/2010jtecha1336.1
https://doi.org/10.1175/2010jtecha1336.1
Publikováno v:
Journal of Atmospheric and Oceanic Technology. 27:1599-1607
In this second article in a two-part work, the biases of weather radar polarimetric variables from simultaneous horizontally and vertically transmit (SHV) data are investigated. The biases are caused by cross coupling of the simultaneously transmitte
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0675f845911f56e51b6105d4bc05278f
https://doi.org/10.1175/2010jtecha1337.1
https://doi.org/10.1175/2010jtecha1337.1