Investigation of the diffuse ultraviolet background using satellite data

Dynamics Explorer Guest Investigator Program : final technical report
  • 4.83 MB
  • 6974 Downloads
  • English

Dept. of Physics and Astronomy, the University of Iowa , Iowa City, IA
Ultraviolet radiation, Extraterrestrial radi
Other titlesDynamics Explorer Guest Investigator Program
Statementprincipal investigator, John D. Fix
SeriesNASA contractor report -- NASA CR-176809
ContributionsFix, John D, United States. National Aeronautics and Space Administration
The Physical Object
FormatMicroform
Pagination1 v
ID Numbers
Open LibraryOL15022177M

INVESTIGATION OF THE DIFFUSE ULTRAVIOLET. BACKGROUND USING SATELLITE DATA NAG (Dynamics Explorer Guest Investigator Program) Final Technical Report INSTITUTION: Department of Physics and Astronomy The University of Iowa Iowa City, IA PRINCIPAL INVESTIGATOR; John D.

Fix Department of Physics and Astronomy The University of Iowa Iowa. the ultraviolet background is spatially varible able on a scale of a degree or less.

General models of the galactic component of the diffuse ultraviolet radiation have been made by several investigators (e.g., Jura a, b, Anderson et al.

Details Investigation of the diffuse ultraviolet background using satellite data PDF

There have already been a number of measurements of the diffuse ultraviolet background. Get this from a library. Investigation of the diffuse ultraviolet background using satellite data: Dynamics Explorer Guest Investigator Program: final technical report.

[John D Fix; United States. National Aeronautics and Space Administration.]. Abstract. Observations of the diffuse EUV background towards different directions using the spectrometers aboard the Extreme Ultraviolet Explorer satellite (EUVE) have been combined into a spectrum from Å to Å and represent an effective exposure of 18 million by: The first useful estimates of the cosmic diffuse EUV background below Å were obtained with an EUV telescope flown on the Apollo-Soyuz mission.

These data were also obtained with a broadband filter, but they had an important advantage over previous results, in that a small field of view was employed and a very extensive data set was obtained.

Description Investigation of the diffuse ultraviolet background using satellite data FB2

We have reanalysed the UVX measurements of the surface brightness of the diffuse ultraviolet background above b = 40 using the dust-scattering model of Onaka & Kodaira (), which explicitly. Solar Ultraviolet Spectral Irradiance Table Of Contents: 1.) SOLAR Model (K. Tobiska) Feb present 2.) NOAA MgII Core-to-wing ratio data present (R.

Viereck) 3.) SORCE (Solar Radiation and Climate Experiment) satellite data present (G. Rottman) 4.) Older archival databases: 4a.) Dr. John Arvesen's Solar Spectral Irradiance data at the top of the atmosphere in the nm.

The dense cloud core, where the visual extinction is A_v >obscures the background diffuse FUV radiation, while a scattered FUV radiation is seen in. The Importance of the Diffuse Ultraviolet Background. There are two reasons why diffuse emission in this narrow band is of great importance.

The first is that a host of disparate, quite unconnected emission sources are either known to exist, or might exist, which could contribute to this diffuse background. Diffuse Infrared Background Experiment (DIRBE) was an experiment on NASA's COBE mission, to survey the diffuse infrared sky.

Measurements were made with a reflecting telescope with 19 cm diameter aperture. The goal was to obtain brightness maps of the universe at ten frequency bands ranging from the near to far infrared ( to micrometer). Also, linear polarization was measured at THE DIFFUSE ULTRAVIOLET BACKGROUND AND ITS RELATION TO NEUTRAL HYDROGEN COLUMN DENSITY by The diffuse ultraviolet background radiation, in contrast, is that ultraviolet Using data obtained with the wide-field ultraviolet spectrometer aboard.

Apollo ULTRASAT (Ultraviolet Transient Astronomy Satellite) is an astronomical mini-satellite whose unprecedentedly large field of view, square degrees, will detect and monitor transient astronomical events in the near-ultraviolet (– nm) spectral region.

ULTRASAT will observe a large patch of sky, alternating every six months between the southern and northern hemisphere. KEYWORDS: Mirrors, Spectrographs, Electronics, Imaging systems, Sensors, Scanners, Ultraviolet radiation, Remote sensing, Field programmable gate arrays, Space operations Read Abstract + SSUSI-Lite is a far-ultraviolet (nm) hyperspectral imager for monitoring space weather.

Given the number and diversity of diffuse interstellar bands (DIBs) in the optical, we might expect many similar features in the satellite UV. However. despite considerable effort over the years, analysis of data from both Copernicus ana IUE (resolutions of 12 and 25 km/s, respectively) have produced very little in the way of convincing results Author: Jason A.

Cardelli. and diffuse sky spectral irradiance as well as the spectral diffuse fraction, aerosol optical depth (AOD), and total column ozone were retrieved from these spectral measure-ments.

Diffuse fraction for the UVB wave band was defined as the mean of the,and nm wave band measurements. Diffuse fraction for the ultraviolet-A (UVA).

Download Investigation of the diffuse ultraviolet background using satellite data FB2

Search the leading research in optics and photonics applied research from SPIE journals, conference proceedings and presentations, and eBooks. Cosmic Unresolved Background Instrument using CCD's: DAISY: Data Acquisition and Interpretation System: DASI: Degree Angular Scale Interferometer/td> DAZLE: Dark Ages Z (redshift) Lyman-alpha Explorer: DEBRA: Diffuse Extragalactic Background RAdiation: DEBRIS: Disc Emission via a Bias-free Reconnaissance in the Infrared/Sub-millimetre (not bad.

NWS meteorologists often issue tornado warnings using satellite data. Satellite has a distinct advantage over radar when it comes to tornado detection.

True b. False The altitude of a GOES weather satellite is: a. 35 kilometers b. kilometers c. 3, kilometers d. 35, kilometers e. Abstract. An investigation was carried out to assess the value of ultraviolet auroral images for remote sensing of electron precipitation.

The authors compared auroral images, obtained by both cameras of the Viking Ultraviolet Imager during April and early Maywith simultaneous measurements of electron precipitation from the DMSP F7 and HiLat satellites at low altitudes above the auroral.

Extreme Ultraviolet The Sun in extreme ultraviolet, from the GOES Solar X-ray Imager courtesy of NOAA/Space Weather Prediction Center. Current Northern auroral position from the SWPC using the NOAA POES satellite.

Figure 2 – The percentage diffuse UVA radiation in the (a) morning, (b) noon and (c) afternoon. For the majority of the cases, the percentage diffuse UV ery and UVA are higher in the tree shade compared to the respective diffuse irradiance percentages in the full sun.

At noon, there is a better defined separation between the diffuse erythemal UV in the tree shade compared to the diffuse.

The potential for UV satellite observations of atmospheric aerosol, including volcanic ash, was first realized in the late s, using data from the Total Ozone Mapping Spectrometer (TOMS) instrument (Hsu et al., ; Herman et al., ; Krotkov et al., ; Seftor et al., ; Torres et al., ).

However, the obvious drawback of the UV Cited by: 4. I think science has become stuck in the rut of Big Bang thinking. There is a diffuse ultraviolet background, a diffuse X-ray background, a diffuse gamma ray.

Wiring-Ultraviolet. Dimension-Solid State Purple Peeper(R) Ultraviolet Flame Dectector. Dimension-Dynamic Self-Check Ultraviolet Flame Detector. Technical Documents. Product Data and Specifications-Product Data for CE, CF 24 Vdc Solid State Purple.

A third class of ultraviolet source is the simple plasma for which the necessary atomic or molecular data are known. For example, a high-temperature (∼20, K), wall-stabilized, hydrogen arc is a source of known spectral radiance in the air ultraviolet from to nm, given the continuum emission coefficient and the plasma length [25, 26].

DIRBE (Diffuse Infrared Background Experiment) - Infrared absolute sky brightness maps in the wavelength range to microns were obtained to carry out a search for the cosmic infrared background (CIB). The CIB was originally detected in the two longest DIRBE wavelength bands, and microns, and in the short-wavelength end of the FIRAS spectrum.

Climate modification by stratospheric SO2 injections, to form sulfate aerosols, may alter the spectral and angular distributions of the solar ultraviolet and visible radiation that reach the Earth’s surface, with potential consequences to environmental photobiology and photochemistry.

We used modeling results from the CESM1(WACCM) stratospheric aerosol geoengineering large ensemble (GLENS Cited by: 3. These relationships may be modified, however, by cloud cover and other factors. From satellite data sampled between and it has been determined that annual sunburning (or "erythemal") UV radiation levels increased by ± 3% at 60ºN and ± % at 40ºN per decade.

This data is presented by ARPANSA for the purpose of disseminating information about solar ultraviolet radiation levels, free of charge, for the benefit of the public. Nothing contained on this website, or the data presented, is intended to be used as a substitute for a health professional's advice.

of measurements to determine the reflected, direct and diffuse solar UV radiation. The UV waveband is comprised of the UVA ( - nm), UVB ( - nm) and UVC ( - nm) wavelengths.

No UVC is present at the earth’s surface as a result of efficient absorption by oxygen and ozone in the atmosphere.

The solar UV radiation at the Cited by: 2. Ultraviolet and far-ultraviolet auroral spectra ( A) were taken during a very disturbed period (K{sub p} = 7+) on June 2,by the S polar-orbiting satellite over the nightside, winter southern hemisphere polar region.

The spectra from the equatorward section ( to deg.The Use of Ultraviolet Thomson Scattering as a Versatile Diagnostic for Detailed Measurements of a Collisional Laser Produced Plasma [Tracy, M.

D., Office of Scientific and Technical Infor] on *FREE* shipping on qualifying offers. The Use of Ultraviolet Thomson Scattering as a Versatile Diagnostic for Detailed Measurements of a Collisional Laser Produced PlasmaAuthor: Mark David Tracy.In the first weather satellite dramatically opened humanity’s eyes to the beauty and complexity of Earth’s atmosphere.

Never before had anyone photographed a hurricane’s movement or cyclonic shape (see Figure ) or observed the global form of atmospheric waves on a planetary proving the usefulness of orbiting weather observations, NASA and the National Oceanic and.