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... The predictive power of current models (the so-called meteor forecasting) has given us the exact timing of the Leonid storms of 2001 and 2002 to the nearest hour and are now used to predict the arrival times of major annual showers such as the Perseids . ... Towards this goal, the Observatory has installed a sky-monitoring system, consisting of one medium angle (MA) and two wide-angle (WA) video cameras linked to software designed to detect motion. ... Bright Taurid Meteor . ... Meteors on Mars . ...

Towards Practical Applications of THz Josephson Oscillators with Sub-mW Power and 500 GHz Frequency Tunability H. B. Wang1, 2, *, J. Yuan2, D. Y. An1, 2, N. Kinev3, M.Y. Li1, 2, X. J. Zhou1, M. Ji1, 2, Y. Huang1 ... Collective Quantum Phenomena in LISA+, Universitaet Tuebingen, D-72076 Tuebingen, Germany *Email: hbwang1000@gmail.com maximum detected power of 25 W, the frequency can be tuned by either bias ... Emission of coherent THz radiation from superconductors", Science 318, 1291, 2007. ...

Examples of some of the newly discovered double active nuclei. On the left are traditional astronomical "seeing limited" images from the Sloan Digital Sky Survey; the central box is shown expanded on the right, as observed with the Keck telescope and Adaptive Optics. In one image, there is a further zoom-in on the central portion shown in the upper right.) ...

OptInt PmWiki . ... Tech Meet 12 . ... Page History | ... MROI Delay Line Design Contract . ... Return to Tech Meet 12 ( Edit ) . ... October 28, 2010, at 05:31 PM by jsy1001 - . ... The upper diagram shows the FLC software tasks and dataflows as presented at the CoDR. The lower diagram includes changes discussed at this meeting, some of which are for our component and integrated tests. ... ISS Data Collector probably not suitable as LocalDataCollector and unlikely to be ready in time . ...

JSC Celebrates 40 Years of Human Space Flight . ... Scheduled for completion about 2006, the completed International Space Station will have a mass of about 1,040,000 pounds. ... The assembled space station will provide the first laboratory complex where gravity, a fundamental force on Earth, can be controlled for extended periods. ... Hospitals, business parks and solar electric power stations that beam clean, inexpensive energy back to Earth are likely to dot the "space-scape" 40 years from now. ...

... Upper 2{sigma} error in GammaUV 25- 29 F5.2 --- e_GammaUV ? ... --------------------------------------------- 1- 11 A11 --- NSpect Spectrum name (G1) 13- 20 F8.5 --- z Redshift 22- 38 A17 --- Line Emission line identification 40- 44 I5 km/s FWHM Rest frame Full Width at Half Maximum 47- 51 I5 km/s E_FWHM Upper 2{ sigma } error limit on FWHM 53- 58 I6 km/s e_FWHM Lower 2{ sigma } error limit on FWHM 61- 65 I5 km/s VPeak Gaussian emission ...

To main of Laboratory . The research work and design of optical and optical-electronic devices are carries out by laboratory staff: . ... Lens: . ... In the layout 1 prism systems perform functions of dispersive element, corrector of aberrations, optical reducer. ... Spectral range 200 - 400 nm; . ... Back Forward . ... The main corrector's function are compensation of field aberrations of the main spherical mirror of a telescope (diameter of 600 mm, f'=1200 mm) and increase aperture ratio. ...

Solar Activity at High Resolution . ... Solar Group . ... Researchers in Arcetri are involved in studies of solar activity at high temporal and spatial resolution, especially at photospheric and chromospheric levels. Our principal aim is to study the temporal correlation between the flares at coronal levels (e.g. hard X-rays emission) and the lower atmospheric signatures, mainly during the preflare and the impulsive phase. ...

ntptrace [ -vdn ] [ -r retries ] [ -t timeout ] [ server ] . ntptrace determines where a given Network Time Protocol (NTP) server gets its time from, and follows the chain of NTP servers back to their master time source. ... Note that the stratum is the server hop count to the primary source, while the synchronization distance is the estimated error relative to the primary source. ... Prints verbose information about the NTP servers. ...

... This thread illustrates a step-by-step recipe to perform EPIC sources detection. ... However, some users - in particular SAS novices - may find useful to perform each individual step of the source detection algorithm, to achieve a better control and understanding of its outcomes. ... The event list MOS.evt is assumed to have been already cleaned for high-background intervals, following, e.g. , steps 3. to 5. in the edetect_chain thread . ... An example of MOS background map is shown in Fig.3. ...

It could be that SETI signals have arrived at the Earth, but are lower then the noise level, and our receivers cannot detect them. ... Fig. ... It follows that two zones form around the star with civilization X: "Zone Yes", where its SETI signal can be detected, and "Zone No", where its signals are hidden by noise (Fig. ... In practice, it is more efficient to use a time factor, since the problem of SETI contact does not limit the duration of the signal element and semantic text. ...

... Previous: Determination of Variable Time Delay in Uneven Data Sets . ... It is shown that the likeness of the periodogram and the LS-spectrum (both estimators of the power spectrum are widely used in the spectral analysis of time series), depends on the properties of the spectral window corresponding to the distribution of time points. ... Present day theory and practice of the spectral analysis of unequally spaced time series are based on two approaches. ...

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. The lower mirage. The lower mirages occur when the air layers at the Earth surface are so hot (for example in deserts), that the light beams coming from the object are greatly twised. Drawing the arch they are coming upwards. Thus we can see houses and trees as it reflected in the water. In reality they are the transformed images of far away landscapes. The lower mirages may be seen even on the burning hot hard-surface road. Back .

... Space flight . ... Space Hotel . ... The program of deployment of small orbital station (SOS) consisting of a family of spacecrafts and module-spacecrafts represents a consecutive realization of flight scenarios with consecutive building up of functions. ... Scenario 1 - the regular and revised spacecrafts of class "Soyuz" - TMSC and MNMSC (MNMSC-cargo, MNMSC-MR) are used, pls. see fig fig.8 . ... The terms of transition to this scenario are determined by terms of readiness of one or another module....

The Mars Flag has a different design on the reverse side. obverse side of flag . ... The orbit lines on the obverse cross the Sun on the lower half of the flag and appear to go behind the Sun on the upper half of the flag. The reverse side has the orbits lines continuing around the Sun on the upper half of the flag. ... The Mars Flag reverse side is a continuation of the obverse side and not just a different design on the back and not a mirror image of the obverse. Main Flag Background Color . ...

... 8, ``Celestial Mechanics'', 2002 On convergence domains of expansions of disturbing function of the planetary three--body problem in powers of eccentricities V. G. Sokolov Pulkovo Observatory, St. Petersburg, Russia The problem of convergence of the expansion of the disturbing function R in power series has long history [1--4]. ... Samoilova--Yakhontova N. S. On convergence of the expansions of the per­ turbing function in powers of eccentricities, Bull. ...

Subject, Object and Problems of Astrophysics. Practical and Theoretical Astrophysics. ... Visual Telescope; Problems Which Are Solved with the Its Help. ... Resolution of Telescopes. ... Effectiveness of Telescope in Respect of Resolution. ... Optical Power of Telescopes for Star-like and Extensive Objects. Boundary Magnitude. Reasons of Light Dissipation in Telescopes. ... Spectral Instruments in Astrophysics. ... Basic Photometrical Ideas, Magnitudes and Their Measurement. ...

... COMPUTER SIMULATION OF RADIOWAVE MULTIPLE SCATTERING EFFECTS IN IONOSPHERE USING MONTE-CARLO METHOD . ... Distribution of reflected radiation on the ground is computed. ... Such influence can be remarkable if the scattering is multiple, i.e. the optical thickness for the scattering process is considerably greater than a unit. ... Radiation energy transfer in the slab is modeled by distribution of some particles carring small portions of radiation energy. ... The isotropic plasma approximation is...