Zobrazeno 1 - 10
of 28
pro vyhledávání: '"R. F. Woodman"'
Publikováno v:
History of Geo- and Space Sciences, Vol 10, Pp 245-266 (2019)
The purpose of these historical notes is to present the early history of the Jicamarca Radio Observatory (JRO), a research facility that has been conducting observations and studies of the equatorial ionosphere for more than 50 years. We have limited
Externí odkaz:
https://doaj.org/article/bd6aedc3a091477f81612be65518ff64
Publikováno v:
Annales Geophysicae, Vol 34, Pp 767-780 (2016)
The SOUSY (SOUnding SYstem) radar was relocated to the Jicamarca Radio Observatory (JRO) near Lima, Peru, in 2000, where the radar controller and acquisition system were upgraded with state-of-the-art parts to take full advantage of its potential
Externí odkaz:
https://doaj.org/article/3e37ecd9b72b47f785e99cc26c9ca11c
Autor:
R. F. Woodman
Publikováno v:
Annales Geophysicae, Vol 27, Pp 1915-1934 (2009)
One of the oldest scientific topics in Equatorial Aeronomy is related to Spread-F. It includes all our efforts to understand the physical mechanisms responsible for the existence of ionospheric F-region irregularities, the spread of the traces in
Externí odkaz:
https://doaj.org/article/901668690be64156be98b3d52df0e877
Publikováno v:
Annales Geophysicae, Vol 27, Pp 933-942 (2009)
For many years strong radar echoes coming from 140–170 km altitudes at low latitudes have been associated to the existence of field-aligned irregularities (FAIs) (the so called 150-km echoes). In this work, we present frequency spectra as well a
Externí odkaz:
https://doaj.org/article/8151285a325840deaa5c1553cefce7fb
Autor:
D. L. Hysell, M. F. Larsen, C. M. Swenson, A. Barjatya, T. F. Wheeler, T. W. Bullett, M. F. Sarango, R. F. Woodman, J. L. Chau, D. Sponseller
Publikováno v:
Annales Geophysicae, Vol 24, Pp 1387-1400 (2006)
Sounding rocket experiments were conducted during the NASA EQUIS II campaign on Kwajalein Atoll designed to elucidate the electrodynamics and layer structure of the postsunset equatorial F region ionosphere prior to the onset of equatorial spread
Externí odkaz:
https://doaj.org/article/84eb563537494abe886cdcdc72750474
Autor:
J. L. Chau, R. F. Woodman
Publikováno v:
Atmospheric Chemistry and Physics, Vol 4, Iss 2, Pp 511-521 (2004)
We present results of recent observations of meteor-head echoes obtained with the high-power large-aperture Jicamarca 50MHz radar (11.95°S, 76.87°W) in an interferometric mode. The large power-aperture of the system allows us to record more than 30
Externí odkaz:
https://doaj.org/article/fad2c47c6cf44b85a577cbba14a5347d
Publikováno v:
Annales Geophysicae, Vol 20, Pp 1203-1212 (2002)
We present a summary of the statistical characteristics of echoes from ionospheric (E- and F-region) field-aligned irregularities obtained with the Piura VHF radar. This radar is located at ~ 7.0° dip latitude, just outside the equatorial elec
Externí odkaz:
https://doaj.org/article/153adba0782e49b3bc8764c845af570c
Publikováno v:
Radio Science. 36:1209-1220
When the space shuttle orbiting maneuver subsystem (OMS) engines burn in the ionosphere, a plasma density depression, or “hole,” is produced. Charge exchange between the exhaust molecules and the ambient O+ ions yields molecular ion beams that ev
Autor:
R. F. Woodman
Publikováno v:
New Zealand Journal of Agricultural Research. 42:207-222
A field experiment was conducted at nine montane tussock grassland sites forming toposequences of soil temperature, moisture, and fertility in the southern Mackenzie Basin, South Island, to characterise the adaptational range and development dynamics
Publikováno v:
New Zealand Journal of Agricultural Research. 41:53-63
Field experiments were undertaken on two infertile and acidic soils in the semi‐arid Mackenzie Basin, South Island, New Zealand, to determine the influence of fertiliser placement and rate of N application (0, 15, or 30 kgN ha−1) on the establish