The chromospheric spectrum at the 1962 eclipse.
Chromospheric spectrum at 1962 eclipse, discussing slitless spectrograms of flash spectrum, equipment, procedures and data
Dunn, R. B.↗
SEARCH · Search NASA
Results for “spectrogram”
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
A spatio-temporal analysis of velocity fields in the solar photosphere.
Velocity fields in solar photosphere, discussing series of high spatial resolution spectrograms of solar center disk
Frazier, E. N.↗
Pulsars - Observations of spectra.
Dynamic spectrograms of pulsars CP 1919 and CP 0834 over bandwidth of 3 MHz, noting instantaneous spectrum and time frequency history
Goldstein, R. M.↗
Vibrational populations of Herzberg 1 band of molecular oxygen and synthetic spectra of the Herzberg bands in the night airglow
Vibrational populations of Herzberg 1 oxygen system by computer program compared to known spectrograms
Degen, V.↗
Radar observations of Icarus.
Radar observation of Icarus at time of close approach, giving values of radius, rotation period and Doppler shift derived from spectrograms
Goldstein, R. M.↗
Mars - Water vapor in its atmosphere.
Water vapor abundance in Mars atmosphere determined from spectrograms, noting restricted existence on surface
Mason, H. P.↗
Vibrational populations of O sub 2
Herzberg bands synthetic spectra matched to various spectrograms to determine vibrational populations of molecular O state in nightglow
Degen, V.↗
Superior conjunction of Pioneer 6
Pioneer 6 radio signal spectrograms during solar occultation, noting solar event effects on bandwidth
Goldstein, R. M.↗
Isotopes of magnesium in the sun
Magnesium hydride absorption lines in sunspot spectrograms indicating heavy Mg enhancement in sun relative to earth
Branch, D.↗
Absorption measurements of earth's hydrogen atmosphere from solar hydrogen Lyman alpha rocket data
Absorption at solar H Lyman alpha line by earth hydrogen atmosphere measured as function of altitude from Aerobee flight spectrograms
Bruner, E. C., Jr.↗
Mercury - Surface features observed during radar studies
Mercury surface features from spectrograms of depolarized radar echoes
Goldstein, R. M.↗
Ultraviolet line profiles of O I in the solar spectrum
Solar spectrum O I, obtaining high resolution UV line profiles from rocket-borne spectrograms
Bruner, E. C., Jr.↗
Observations of O and Of stars
Spectroscopic properties and spectrograms of O and Of stars
Heap, S. R.↗
A study of the blue stragglers in the open cluster NGC 7789
Open cluster NGC 7789 blue stragglers data acquisition from image tube spectrograms and four color and H beta photometry, obtaining location along main sequence
Strom, K. M.↗
Mass motion in the solar chromosphere
Solar chromosphere mass motion, studying macroturbulence influences on visible spectrum lines high resolution profiles from rocket spectrograms
Jones, R. A.↗
The molecular spectrum of sunspots
Sunspot molecular lines and rotational temperatures of MgH, CaH and TiO using model umbral atmospheres and photographic spectrograms
Webber, J. C.↗
Absolute intensity calibrations of solar K line profiles
Individual K-line profiles from elements of fine structure on the surface of the sun are calibrated absolutely. The continuum calibrations of Labs and Neckel and of Houtgast and Namba are considered, and the average K-profile is scaled to that of White and Suemoto. The ranges of intensities across a high-resolution spectrogram are tabulated for various parts of the line profile. Although the spatially-averaged value for K3 of 4.2% of the continuum corresponds to a brightness temperature of 4155 deg K, minimum and maximum values were 3980 and 4360 K, respectively. Similarly, K2v ranges from 4200 to 4560 K, and K2r from 4180 to 4460 K in small elements about 1 arc sec across.
Pasachoff, J., M.↗
Observations of O and Of stars.
Evaluation of spectrograms with a dispersion of 16.2 A/mm covering the spectral range from 3300 to 4900 A obtained for three early O stars and three early Of stars. Detailed line profiles of selected hydrogen and helium lines were obtained, and equivalent widths of nearly all visible lines were measured. Comparison of the spectroscopic properties between Of stars and O stars suggests that Of stars have lower surface gravities than do O stars. Comparison of their photometric properties confirms this suggestion. Hence present temperature scales for O5-O8 stars should not be applied to Of stars until the effect of gravity in determining spectral type has been determined. In addition, the spectra suggest that atmospheric models of Of stars should take into account spherical and hydrodynamic effects.
Heap, S. R.↗