Calculation of Atmospheric Emission Measured by Gregorian Feed Horns Paul F. Goldsmith September 16, 2001 As we use higher frequencies, emission from the Earth's atmosphere becomes more sig- ni cant. ... To use this program, you input the altitude, temperature, and precipitable water vapor (pwv) in mm. ... I have run the ATM code for several values of pwv with plausible temperature, and generated the zenith sky temperature as a function of frequency between 1 and 15 GHz. ...

We have designed the laboratory model of static Fourier spectrometer for onboard usage for spectral study of atmosphere and ionosphere. The gain of model is to simulate onboard FS which will not have any moving elements (all its optical elements will be mounted at fused quartz monolithic construction), to compare experimental results with theoretical estimations and to measure MTF of CCD array. ... This fact connected with low frequency response of CCD array due to small format of it. ...

Cold-Electron Bolometer Arrays for THz Detection Leonid S. Kuzmin b , Mikhail A. Tarasovc,d, , Sumedh H. Mahashabdea, and Valerian S.Edelmane, Chalmers University of Technology ... Electronics, Moscow, Russia c P.Kapitza Institute for Physical Problems, Moscow, Russia a a,b,c Abstract-- Various concepts of Cold-Electron Bolometer (CEB) Arrays are considered for THz detection from 300 GHz to 7 THz ... Optical response to THz radiation is 300 µV for 2.7/0.3 K temperature difference. ...

Russian SHAREABLE DATA CENTER Institute of Solar-Terrestial Physics SB RAS . ... Although their determination is based on the scattering process model, independent check-ups by rocket experiments have shown their correctness in experimental applications. ... Ionospheric data analysis, especially during strong disturbances, cannot be without some other kinds of diagnostic tools. ... The lack of data has always been a challange in this case. ...

... It can · · obtain ice sample from 20 cm or deeper surface layer, then melt it and extract biomass from the ice surface water by filtration; Laser TOF MS for the measurements of element composition of the biomass; Gas TOF MS for the detection of: 1) volatile components, generated at the heating of biomass sample (closed window mode); 2) secondary ions , emitted from ice matrix by the influence of energetic magnetosphere ... Spectrum of yeast sample. ... Laser TOF MS 6. ...

Electron-Bombarded, Back-Illuminated CCD Sensors . ... EBCCD PERFORMANCE: Resolution and CTF . ... Measured CTF for an SI502AB back-illuminated CCD, a GaAs SI502AB EBCCD, . ... Figure 8 depicts each sensor's measured CTF. ... The EBCCD's CTF is only slightly lower in contrast than the back-illuminated CCD's CTF and, depending upon the spatial frequency of interest, is 20% to 100% higher in contrast than the ICCD's CTF. ... Measured CTF for GaAs SI502AB EBCCD #A (1.8 keV) and SI502AB ICCD using a . ...

... A. M. Neminsky, P. N. Nikolaev, and D. V. Shovkun . ... The temperature dependence of the magnetic field penetration depth lambda ( T ) is determined down to 0.2 T c by the ac-susceptibility measurements on the Rb 3 C 60 fine powder with small, about 1 K, variation in the grains' superconducting transition temperatures. The lambda ( T ) temperature dependence is exponential at low temperatures, which allows us to determine the energy gap Delta 0 =1.7 k B T c . ...

THE THERMAL RADIATION OF THE LUNAR SURFACE IN THE IR RANGE OF THE SPECTRUM (10-12 µm). ... 0.80 0.60 0.40 0.20 0.00 -0.20 -0.40 -0.60 -0.80 -0.80 -0.60 -0.40 -0.20 0.00 0.20 0.40 0.60 0.80 Fig.1 0.80 0.60 0.40 0.20 0.00 -0.20 -0.40 -0.60 -0.80 -0.80 -0.60 -0.40 -0.20 0.00 0.20 0.40 0.60 0.80 Fig.2 0.60 0.40 0.20 -0.00 -0.20 -0.40 -0.60 -0.60 -0.40 -0.20 -0.00 0.20 0.40 0.60 0.80 Fig.3 Indicatrix of the thermal radiation of the Moon (10.5-12.5 µ). ...

Next: Antenna gain considerations and Up: Some Theory Previous: Polarisation . To provide correct flux density units for the visibilities, , from an interferometer, the measured correlation coefficient at the correlator ( ) needs to be scaled by a system temperature and a telescope sensitivity factor ( ). ... For a zenith opacity , observing at an elevation of , and if the atmosphere is approximated as having a uniform temperature , then the atmospheric contribution to system temperature is . ...

One of the most innovative x-ray detector designs of the past decade is the microcalorimeter. ... In principle, energy resolutions as good as ~1 eV (FWHM) should be possible. ... In its most basic form a microcalorimeter consists of three parts: a thermal mass that absorbs the x-ray and converts the energy to heat, a thermometer to measure the temperature rise of the thermal mass, and a thermal link to a heat sink to allow the absorbed energy to escape from the thermal mass. ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Observation of 40 Eri B obtained with ISIS on MJD 57056.92. ... Searches for magnetic fields in white dwarfs have clarified both the frequency of occurrence and the global structure of the fields found down to field strengths of the order of 500 kG. ... In this paper we report the successful testing of a very sensitive method of longitudinal field detection in DA white dwarfs. ...

... As sketched in Fig. 3, registered images are influenced by fractions of the original signal from outside the domain of measured data. ... Inner Region . ... A rigorous solution which completely avoids the boundary problem is the extension of the region of restoration by the extent of the point spread function. If the extent of the measured data is 512 512 and the extent of the point spread function is 256 256, the extent of the region of the restoration should be (512 + 256) (512 + 256) = 768 768. ...

Comparison of Rockwell 1024x1024 MCT arrays science grade #2 and science grade #3 Gert Finger, G. Nicolini European Southern Observatory 1.0 Scope Two detectors are available for the short wavelength arm of ISAAC, namely the science grade #1 and the science grade #2 Rockwell 1Kx1K MCT arrays. ... 2.0 Cosmetic quality Figure 1shows efficiency. ... Comparison of Rockwell 1024x1024 MCT arrays science grade #2 and science grade #321 September 1998 1 FIGURE 1. ... Rockwell science grade #3. ... FIGURE 3. ...

... The discovery of this radiopulsar is potentially important not only for confirming the theory of evolution of NS, but also for understanding processes occurring in stellar winds   from normal stars. After all, a radiopulsar orbiting in the semi-transparent stellar wind of a normal star is a sort of probe scanning an inhomogeneous plasma by pulsed radiation (Lipunov and Prokhorov, 1984)[ 110 ]. ... 1) absorption of radio waves (light curve); . ... This object is a radiopulsar orbiting a Be-star. ...

... Polish scientists at the Space Research Centre, Polish Academy of Sciences, in Wroclaw, south-west Poland, have constructed an instrument called SphinX (short for Solar PHotometer In X-rays), which is an X-ray spectrophotometer, that will obtain spectra in the energy range 0.5--15 keV in 256 energy channels with frequency of up to 100 times a second. ... SphinX is part of a package of instruments known as TESIS (PI Prof. Sergei Kuzin, Lebedev Institute, Moscow). ... Space Research Centre, . ...

... At high latitudes, the E-region auroral electrojets and field-aligned currents produce 'radar aurora' that are somewhat more complicated than the equatorial radar echoes. ... Type 4 echoes are a special type of two-stream events associated with anomalous electron heating by the auroral electrojet waves. ... Res. ... Hedberg, and J. A. Nordling, Observations of auroral E-region plasma waves and electron heating with EISCAT and a VHF radar interferometer, J. atmos. terr. ... Observations, J. Geophys. ...

ON THE IMPACT OF THE GALACTIC ABERRATION ON VLBI-DERIVED PRECESSION MODEL Z.M. MALKIN Pulkovo Observatory Pulkovskoe Ch. ... Corrections to adopted precession rate are usually computed from the linear trends in long-term time series of celestial pole offset (CPO), which are the differences between the measured and the theoretical coordinates of the celestial pole. ... CONCLUSIONS We have estimated the impact of GA on parameters of precession-nutation model derived from VLBI observations. ...

Ralph: Visible and infrared imager/spectrometer; provides color, composition and thermal maps. Alice: Ultraviolet imaging spectrometer; analyzes composition and structure of Pluto's atmosphere and looks for atmospheres around Charon and Kuiper Belt objects (KBOs). REX: Measures atmospheric composition and temperature; passive radiometer. ... SWAP: Solar wind and plasma spectrometer; measures atmospheric "escape rate" and observes Pluto's interaction with solar wind. ...

... Telescopes . ... 1996: . According to the interferometric observations at 6-m telescope with the panoramic infrared detector NICMOS-3, for the first time in the world the angular diameters of the mirid stars R Cas and R Leo were measured at the wavelengths between 1045nm and 2170nm. ... A study of fluctuations of the galactic gas emission at high latitudes within the "Cold" survey band with high sensitivity was made with the RATAN-600 radio telescope. ... Archive . ...

New reduction of minor planets photographic plates obtained with Pulkovo Normal Astrograph A.A. Berezhnoy Pulkovo Observatory of RAS, Saint-Petersburg, Russia Minor Planet observations at Pulkovo Periodical observations of 14 bright asteroids named Selected Minor Planets (SMP) were performed at Pulkovo since 1948 within the international framework started by works of B.V. Numerov and D. Brouwer. ... 108 133 113 74 124 67 97 88 14 84 64 5 20 19 Epochs (YYYY.MM) 1200 Mean values of total obs. ...