22,724 research outputs found
Ionospheric signatures of plasmaspheric tails
No full text[1] We make direct comparisons between GPS maps of total electron content (TEC) over the North American continent, Millstone Hill radar observations of storm enhanced density, and low and high‐altitude satellite measurements of the perturbation of the outer plasmasphere during the March 31, 2001 geomagnetic storm. We find that storm enhanced density (SED) and plumes of greatly‐elevated TEC are associated with the erosion of the outer plasmasphere by strong sub‐auroral polarization electric fields. The SED/TEC plumes identified at low altitude map closely onto the magnetospheric determination of the boundaries of the plasmapause and plasmaspheric tail determined by EUV imaging from the IMAGE spacecraft. Characteristics of the SED/TEC plumes/tails for the March 31, 2001 event are: TEC ∼ 100 TECu; F‐region sunward velocity ∼1000 m/s; sunward flux ∼5*10[superscript 24] ions s[superscript −1]; total transport to dayside magnetopause/merging region (3‐hr event) ∼5*10[superscript 28] ions.United States. Air Force Office of Scientific Research (Contract AF19628-00-C-0002
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News bulletin from Luzon, Philippines; Upton Close; Cedric Foster; John Daly; Joseph C. Harsch
No full textRecording of multiple news programs from various networks: A news bulletin from Luzon, in the Philippines; Upton Close, World Parade (NBC, WKY); Cedric Foster (Mutual, KOCY); John Daly, The World Today (CBS, KOMA); Joseph C. Harsch, The Meaning of the News (CBS, KOMA)
Letter from J. Ross Browne to Chas. E. Mix with a testimony from Stephen C. Foster, 1858
No full textRegarding the sale of 600 head of Spanish cattle in October 1856 to Supt. Henley by L. D. Vincenhaler. Enclosed a testimony of Stephen C. Foster
Casket presented to J.J.C. Bradfield, New South Wales Minister for Public Works and Railways, by Dorman, Long & Co. Ltd., the contractors for the construction of Sydney Harbour Bridge on the occasion of laying the foundation stone, 26 March 1925 [1] [picture] /
No full textTitle devised by cataloguer from accompanying documentation.; Part of the Collection of photographs of Sydney by A.G. Foster.; Condition: Silvering.; Also available in an electronic version via the Internet at: http://nla.gov.au/nla.pic-vn3075193
Cold plasma redistribution throughout geospace
No full textThe redistribution of the electrically charged cold plasma of ionospheric origin involves the equatorial, low, mid, auroral, and polar-latitude regions in a multi-step, system-wide process linking the regions of geospace. Observations with ground and space-based instruments characterize the geospace plume-regularly occurring channels of enhanced plasma density flowing at both ionospheric and magnetospheric altitudes. Convection in the SAPS channel transports the eroded material to the noontime cusp in the ionosphere and to the dayside magnetopause at high altitudes. As the fluxes of cold plume plasma traverse the cusp and enter the polar cap, they form the polar tongue of ionization. At the cusp the plume plasma provides a rich source of heavy ions for the magnetospheric injection and acceleration via the mechanisms operative on those field lines
SAPS: A new categorization for sub-auroral electric fields
No full textSub‐auroral electric fields play critical roles in energizing and transporting ring current ions, as well as convecting thermal plasma in the inner magnetosphere and in the mid‐ to low‐latitude ionosphere. A number of terms have been employed to describe the sub‐auroral electric fields and many of these are specifically associated with processes established through their prior use in the literature. The continued use of descriptive terms such as penetration electric fields, polarization jets, and sub‐auroral ion drifts could lead to misunderstanding, especially when comparing the broad/narrow, persistent/transient regions of sub‐auroral electric field and plasma flow. An inclusive name for these phenomena is sub‐auroral polarization streams (SAPS)
Letter from Marion Foster Washburne to John Muir, 1913 Aug 25.
No full text[6]Please address me as above. After that at Tulare, Calif.c/o C. W. WashburneSincerely yours,(Mrs.) Marion Foster WashburneP.S. You may be interested to know that I have a big son named John Noble after his great-uncle.M.F.W.https://scholarlycommons.pacific.edu/jmcl/42535/thumbnail.jp
While the bowl goes round we'll all be jolly fellows [first line of chorus]
No full textstrophic with choruspiano and voice (solo and satb chorus)ads on back cover for John J. Daly stock352-3Johns Hopkins University, Levy Sheet Music Collection, Box
070, Item 053Words by George Cooper. Music by Stephen C. Foster
While the bowl goes round we'll all be jolly fellows [first line of chorus]
No full textstrophic with choruspiano and voice (solo and satb chorus)ads on back cover for John J. Daly stock352-3Johns Hopkins University, Levy Sheet Music Collection, Box
070, Item 053Words by George Cooper. Music by Stephen C. Foster
Van Allen Probes Observations of Oxygen Ions at the Geospace Plume
No full textThe geospace plume couples the ionosphere, plasmasphere, and magnetosphere from sub-auroral regions to the magnetopause, on polar field lines, and into the magnetotail. We describe Van Allen Probes observations of ionospheric O+ ions at altitudes of 3–6 R[subscript E] in the near vicinity of the geospace plume in the noon and post-noon sector. The temporal variation of warm ion fluxes observed as a function of time on a moving spacecraft is complicated by changing spacecraft position and complex ion drift paths and velocities that are highly sensitive to ion energy, pitch angle and L value. In the “notch” region of lower density plasma outside the morning-side plasmapause, bi-directionally field aligned fluxes of lower energy (&lt;5 keV) ions, following corotation-dominated drift trajectories from the midnight sector, are excluded from geospace plume field lines as they are deflected sunward in the plume flow channel. In general, O+ at ring current energies (∼10 keV) is bi-directionally field aligned on plume field lines, while lower energy O⁺( 20 keV in the dusk sector outer plasmasphere is interpreted as evidence for localized ionospheric O+ outflow at the outer edge of the geospace plume with subsequent O+ acceleration to >50 keV in <30 min during the ions’ sunward drift.NASA (Contract NAS5‐01072
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