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Author: Robert R. O'Neil Publisher: ISBN: Category : Atmospheric radiation Languages : en Pages : 20
Book Description
Atomic and molecular emissions from 1600 angstroms to 2800 angstroms and from 1.5 to 22 microns were measured by on-board instruments at altitude range 70 to 128 km. The observed dominant emissions are N2 Wu-Bensch, C02 at 4.3 micron and N0 at 5.4 micron.
Author: Robert R. O'Neil Publisher: ISBN: Category : Atmospheric radiation Languages : en Pages : 20
Book Description
Atomic and molecular emissions from 1600 angstroms to 2800 angstroms and from 1.5 to 22 microns were measured by on-board instruments at altitude range 70 to 128 km. The observed dominant emissions are N2 Wu-Bensch, C02 at 4.3 micron and N0 at 5.4 micron.
Author: Irving L. Kofsky Publisher: ISBN: Category : Languages : en Pages : 100
Book Description
Nuclear infrared-backgrounds simulation data from excitation of the upper atmosphere by auroral particles and 3 kV electron beams from DNA/AFGL's EXCEDE: Spectral rocket are analyzed and interpreted. The delay of 2.8 - 3.1 micro radiation output from greater 1BC 11 aurora calculated by a cross-correlation method from aircraft measurements by instruments with footprint less than 1 km has an average value of 2 sec and (like the previously-measured energy conversion yields) appears to increase with the height of the maximum of the energy deposition rate profile. Fits of radiance data from moving arcs to a simple model of vibrational-bands emission from nitric oxide result in exponential predosing time constants between 1 1/2 and 2 1/2 sec, in qualitative agreement with current aerochemistry models. Volume emission rate distributions of the blue-violet air fluorescence within 20 m of EXCEDE's accelerator were unfolded from radiometric photographs taken at characteristic ejection altitudes from onboard. This emission decreases very rapidly away from the rocket, and transverse to the beam axis fits gaussian whose width first increases and then decreases. The measured excitation patterns, which cannot be fully attributed to outgassing from the vehicle, are interpreted in terms of a recent theoretical treatment of discharge initiation and electron heating resulting from an interaction between the charged beam and the local plasma it creates.
Author: Bjorn Grandal Publisher: Springer Science & Business Media ISBN: 1468442236 Category : Science Languages : en Pages : 688
Book Description
These proceedings are based upon the invited review papers and the research notes presented at the NATO Advanced Research Institute on "Artificial Particle Beams in Space Plasma Studies" held at Geilo, Norway April 21-26, 1981. In the last decade a number of research groups have employed artificial particle beams both from sounding rockets and satellites in order to study various ionospheric and magnetospheric phenomena. However, the artificial particle beams used in this manner have given rise to a number of puzzling effects. Thus, instead of being just a probe for studying the ambient magnetosphere, the artificial particle beams have presented a rich variety of plasma physics problems, in parti~ular various discharge phenomena, which in themselves are worthy of a careful study. The experimental studies in space using artificial particle beams have in turn given rise to both theore tical and laboratory studies. In the laboratory experi ments special attention has been paid to the problem of creating spacelike conditions in the vacuum chamber. The theoretical. work has addressed the question of beam plasma-neutral interaction with emphasis on the wave generation and the modified energy distributions of the charged particles. Numerical simulations have been used extensively. With the advent of the Space Shuttle in which several artificial particle beam experiments are planned for the 1980's, there is a growing interest in such experiments. Furthermore, there is a need for coordinating these studies, both in space and in the laboratory.
Author: Robert R. O'Neil Publisher: ISBN: Category : Atmosphere, Upper Languages : en Pages : 44
Book Description
EXCEDE is a program designed to study atmospheric infrared emissive processes induced by a rocketborne electron accelerator in the altitude range 80 to 140 km. The primary scientific interest is the investigation of the detailed production and loss processes of various excited electronic and vibrational states resulting in optical and infrared emission as energetic primary electrons and their secondary and all subsequent generation electrons are stopped in the atmosphere. The electron-induced optical and infrared emissions simulate natural auroral processes with the very significant advantage that the dosing conditions of electron energy and power, deposition volume and altitude, and dosing duration are parameters that may be controlled and monitored. To date, three payloads have been launched in the EXCEDE series of artificial auroral experiments. The program status is reviewed and a follow on experiment, EXCEDE II, is described. Both rocket-based and ground-based imaging and spectro-radiometric instruments are proposed. The feasibility of the scientific approach, the magnitude of the atmospheric emissions, the capabilities of ground-support systems, and the engineering design of the proposed experiment are extensions of the technology base established in the earlier EXCEDE launches. (Author).
Author: Publisher: ISBN: Category : Aeronautics Languages : en Pages : 456
Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Author: Robert R. O'Neil
Author: Robert R. O'Neil
Author: Irving L. Kofsky
Author: Bjorn Grandal
Author: U.S. Air Force Geophysics Laboratory
Author: Robert R. O'Neil
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Author: COSPAR. Scientific Commission D. D0.8 Symposium
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