The upper clouds of Venus : determination of the scale height from NIMS--Galileo infrared data

1993 ◽  
Vol 41 (7) ◽  
pp. 505-514
Author(s):  
M Roos
Keyword(s):  
Scale Height ◽  
Infrared Data

The upper clouds of Venus: determination of the scale height from NIMS-Galileo infrared data

1993 ◽  
Vol 41 (7) ◽  
pp. 505-514 ◽  
Author(s):  
M. Roos ◽  
P. Drossart ◽  
Th. Encrenaz ◽  
E. Lellouch ◽  
B. Bézard ◽  
...  
Keyword(s):  
Scale Height ◽  
Infrared Data

Determination of upper-atmosphere air density and scale height from satellite observations

1959 ◽  
Vol 252 (1268) ◽  
pp. 16-27 ◽  
Keyword(s):  
Satellite Orbit ◽  
Major Axis ◽  
Scale Height ◽  
Rate Of Change ◽  
Satellite Observations ◽  
Upper Atmosphere ◽  
Semi Major Axis ◽  
Air Density ◽  
Standard Deviations

A solution is obtained for the rate of change of semi-major axis and perigee distance of a satellite orbit with time due to the resistance of the atmosphere. The logarithm of air density is assumed to vary quadratically with height, and the oblateness of the atmosphere is taken into account. The calculation of perigee air density in terms of the rate of change of satellite period is dealt with; and the method is applied to data at present available on six different satellites. The variation of air density with height is obtained as ln ρ = -28·59(±0·15) - ( h - 200 )/46(±5) + 0·028(±0·013) ( h - 200) 2 /(46) 2 for h in the range of approximately 170 to 700 km, where ρ is in grams/cm 3 , h is in kilometres and standard deviations are given in brackets.

ChemInform Abstract: INFRARED EXAMINATION OF ROTATIONAL ISOMERISM IN ALKYL FURAN-2-CARBOXYLATES- DETERMINATION OF THERMODYNAMIC PARAMETERS FROM INFRARED DATA

1976 ◽  
Vol 7 (26) ◽  
pp. no-no
Author(s):  
DEREK J. CHADWICK ◽  
JOHN CHAMBERS ◽  
ROBERT MACRAE ◽  
G. DENIS MEAKINS ◽  
ROGER L. SNOWDEN
Keyword(s):  
Thermodynamic Parameters ◽  
Rotational Isomerism ◽  
Infrared Data

Determination of sensible heat flux over sparse canopy using thermal infrared data

1989 ◽  
Vol 44 (3-4) ◽  
pp. 197-216 ◽  
Author(s):  
W.P Kustas ◽  
B.J Choudhury ◽  
M.S Moran ◽  
R.J Reginato ◽  
R.D Jackson ◽  
...  
Keyword(s):  
Heat Flux ◽  
Sensible Heat Flux ◽  
Thermal Infrared ◽  
Sensible Heat ◽  
Sparse Canopy ◽  
Infrared Data

Determination of upper-atmosphere air-density profile from satellite observations

1959 ◽  
Vol 252 (1268) ◽  
pp. 28-34 ◽  
Keyword(s):  
Density Profile ◽  
Satellite Orbit ◽  
Major Axis ◽  
Scale Height ◽  
Semi Major Axis ◽  
Relative Variation ◽  
Air Density ◽  
The Earth ◽  
Point Data

The theory previously developed for the changes in the perigee distance and semi-major axis of a satellite orbit due to air drag is extended to enable the air-density profile (i. e. its relative variation with height) to be derived from the motion of the orbit’s perigee. The solution is first obtained in terms of the change in perigee distance and then in terms of the change in the radius of the earth at the sub-perigee point. Data are analyzed by the two methods, leading to 39 (± 9) and 36 (± 15) km for the scale height in the 180 and 220 km altitude regions.

Synthese und Kristallstrukturanalyse von Undecacarbonyl- (μ-trifluormethylisocyanid)trieisen, Fe3(μ-CNCF3)(CO)11 / Synthesis and Crystal Structure Determination of Undecacarbonyl(μ-trifluoromethylisocyanide)triiron, Fe3(μ-CNCF3)(CO)11

1984 ◽  
Vol 39 (6) ◽  
pp. 721-726 ◽  
Author(s):  
Irene Brüdgam ◽  
Hans Hartl ◽  
Dieter Lentz
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Structure Analysis ◽  
Structure Determination ◽  
Crystal Structure Analysis ◽  
Crystal Structure Determination ◽  
Synthesis And Crystal Structure ◽  
Infrared Data ◽  
C Nmr

AbstractThe unstable trifluorom ethylisocyanide can be stabilized on the Fe3(CO)11 framework. Infrared data suggest that the isocyanide ligand occupies bridging positions in the solid state and in solution. This fact has been confirmed by the crystal structure analysis and by 13C NMR measurements.

scholarly journals KiDS+VIKING-450: Cosmic shear tomography with optical and infrared data

2020 ◽  
Vol 633 ◽  
pp. A69 ◽  
Author(s):  
H. Hildebrandt ◽  
F. Köhlinger ◽  
J. L. van den Busch ◽  
B. Joachimi ◽  
C. Heymans ◽  
...  
Keyword(s):  
Near Infrared ◽  
Wide Field ◽  
Photometric Redshifts ◽  
Data Set ◽  
Dark Energy Survey ◽  
Cosmic Shear ◽  
First Time ◽  
Energy Survey ◽  
Infrared Data

We present a tomographic cosmic shear analysis of the Kilo-Degree Survey (KiDS) combined with the VISTA Kilo-Degree Infrared Galaxy Survey. This is the first time that a full optical to near-infrared data set has been used for a wide-field cosmological weak lensing experiment. This unprecedented data, spanning 450 deg2, allows us to significantly improve the estimation of photometric redshifts, such that we are able to include robustly higher-redshift sources for the lensing measurement, and – most importantly – to solidify our knowledge of the redshift distributions of the sources. Based on a flat ΛCDM model we find S8 ≡ σ8 Ωm/0.3 = 0.737+0.040−0.036 in a blind analysis from cosmic shear alone. The tension between KiDS cosmic shear and the Planck-Legacy CMB measurements remains in this systematically more robust analysis, with S8 differing by 2.3σ. This result is insensitive to changes in the priors on nuisance parameters for intrinsic alignment, baryon feedback, and neutrino mass. KiDS shear measurements are calibrated with a new, more realistic set of image simulations and no significant B-modes are detected in the survey, indicating that systematic errors are under control. When calibrating our redshift distributions by assuming the 30-band COSMOS-2015 photometric redshifts are correct (following the Dark Energy Survey and the Hyper Suprime-Cam Survey), we find the tension with Planck is alleviated. The robust determination of source redshift distributions remains one of the most challenging aspects for future cosmic shear surveys.

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