... Astrophysics Group . ... MRAO Telescopes . CLFST . ... Since the early days of Radio Astronomy in Cambridge we have been building instruments to survey the sky at low frequencies. ... The Cambridge Low-Frequency Synthesis Telescope 151-MHz aerials . The CLFST was built in 1980. ... The Cambridge Low-Frequency Synthesis Telescope 38-MHz aerials . ... The photo on the left shows some of the 38-MHz aerials; a group of 151-MHz aerials can be seen on a parallel baseline alongside. ...

GRAVITATIONAL REDSHIFT EXPERIMENT WITH THE SPACE RADIO TELESCOPE RADIOASTRON Dmitry Litvinov1, Norbert Bartel 2, Alexander Biriukov3, Vladimir Kauts3, Victor Kulagin1, Valentin Rudenko1 1 Sternberg Astronomical Institute, Russia 2 3 York University, Canada Astro Space Center, Russia Journees 2014 , Saint-Petersburg , 22-24 September 2014 GRAVITATIONAL REDSHIFT Einstein, 1911: Pound, Rebka, 1960: laboratory test Journees 2014 , ... 2014, Astron. ...

... They are known: active quantum frequency standards on the ammonia molecules beams (molecular generator) on the hydrogen generator (hydrogen generator) passive quantum frequency standards on the Cs atoms’ beam (cerium atomic beam tube); active and passive quantum frequency standards with an optical pumping of Cs or Rb steams. The stability of atomic beam quantum frequency standard achieves 10^ - 14. ...

... Phys., 45, 409-419 10.02.2010 , . PLHR: o 50 / 60 / 100 / 120 o MLR: o 50 / 60 / 100 / 120 o o , - PorojДrvi 17/11/1993 Total power -5 dB 1,8 -15 1,7 -25 1,6 14.09 14.11 Time(UT) -35 14.13 Frequency (kHz) 4,2 4,1 4,0 07.30 -30 -40 07.45 Time(UT) 07.00 10.02.2010 Frequency (kHz) PorojДrvi 25/01/1993 Total power 4,3 -20 dB , . ... 10.02.2010 , . ... f1 < < fn < fn+ 1 20 ms 128 Frequency (kHz) 1,8 1,8 Frequency (kHz) 4 dB 0 -20 1,7 1,7 1,6 0 10.02.2010 30 Time(sec) 60 1,6 -40 0 0,3 Time(sec) 0,6 , . ...

... Likhachev, S., Ladygin, V., & Guirin, I. 2003, in ASP Conf. ... In VLBI, generalized Linear Multi-Frequency Imaging (MFI) consists of multi-frequency synthesis (MFS) and multi-frequency analysis (MFA) of the VLBI data obtained from observations on various frequencies. ... 2003). ... Likhachev, S. F., Ladygin, V. A., & Guirin, I. A. 2003, Lebedev Phys. Institute Preprint, 31, 30p. Likhachev, S. F.,Multi-Frequency Imaging for VLBI, Future Directions in High Resolution Astronomy, in print. ...

Wave-Particle Duality of Light. click here to see a wave experiment . ... In the wave theory, greater light intensity simply means more photons. Each photon ejects electrons in the same way, so more intensity means more electrons. Threshold frequency and electron K.E. should not be affected by intensity. ... Light frequencies below the threshold eject no electrons, no matter how intense the light. Light frequencies above the threshold eject electrons, no matter how low the intensity. ...

Main plasma parameters for inhomogeneous plasma. ... Particle motion in the Earth dipole magnetic field. ... Bounce frequency and bounce motion in the Earth inner magnetopshere. ... Low- frequency electrostatic waves in inhomogeneous low- beta plasma. ... Kinetic drift instability. ... Permittivity tensor for electromagnetic low- frequency waves in inhomogeneous low- beta plasma. Drift Alfven waves. ... Spectra of electromagnetic low- frequency waves in inhomogeneous medium- beta plasma. ...

Feed cabin Nr. ... Fig. ... This allows to realize the sensitivity at frequency ranges 4.8, 11.2 and 30.0 GHz of 5, 7 and 12 mK by double beam switching mode and by the integration time of the output filter 1s. Input waveguide paths were very long and had big losses. ... The focal line of the feed cabin Nr. ... Data Acquisition and Control System . The Data acquisition system of the feed cabin Nr 2 is based on the new measurement ER-DAS system (Embedded Radiometric Data Acquisition System). ...

Stellarium 0.12.3 . ... Classes . ... FileљStructure . ClassљList . ClassљIndex . ... CommLink Struct Reference . Radio communication channel properties. More... #include < Satellite.hpp > . ... description . Channel description. ... Definition at line 41 of file Satellite.hpp . QString CommLink::description . ... The documentation for this struct was generated from the following file: . home/aw/devel/stellarium/trunk/plugins/Satellites/src/ Satellite.hpp . ...

... Schools . ... Dean?s Office . Departments . ... Applied Chemistry Department . ... Theoretical and Applied Systems Engineering Department . ... Economic Cybernetics and Applied Economics Department . ... School of History . ... Ancient and Medieval History Department . ... Ukrainian History Department . ... University History Museum . ... School of Physics . ... The Department of the Ultra High Frequencies was founded in 1952 at the same time with Radiophysical School in Kharkov State University. ...

... IONOSPHERIC DATA IN THE INTERACTIVE SPIDR SYSTEM . ... The Ionosphere The ionosphere is that part of the upper atmosphere where free electrons occur in sufficient density to have an appreciable influence on the propagation of radio frequency electromagnetic waves. ... These regions may be further divided into several regularly occurring layers, such as F1 or F2. ... E Region: The region between about 95 and 150km above the Earth that marks the height of the regular daytime E layer. ...

The technical memorandum: A Kernel Model for Precision Timekeeping (PostScript) describes an engineering model which implements a precision time-of-day function for a generic operating system. ... The model changes the way the system clock is adjusted in time and frequency, as well as provides mechanisms to discipline its time and frequency to an external precision timing source, such as a pulse-per-second (PPS) signal. ...

... 1 300, . ... 1 100 . ... 4 0.2 5 pixel number 10 15 20 pixel number 5 0.15 intensity 10 0.1 15 20 0 0.2 0.15 0.1 0.05 0.05 5 10 15 pixel number 20 5 10 15 pixel number 20 0 0 5 10 15 pixel number 20 1 0.8 0.6 0 OTF 0.4 0.5 0.2 0 -0.5 0 frequency/fd 0.5 -0.5 frequency/fd frequency/fd -0.5 0 frequency/fd 0.5 -0.5 0 0.5 -1 -0.5 0 0.5 frequency/fd 1 . ... 14, , 11 1800 140 1600 160 1400 180 1200 200 pixel number 1000 220 800 240 600 260 400 280 200 300 120 140 160 180 200 220 pixel number 240 260 280 . ...

... Observing springtime deep-sky objects with a large telescope . ... Low Frequency Array telescope shows first fringes . ... A team of astronomers and engineers at ASTRON, the Netherlands Institute for Radio Astronomy, has successfully detected correlated interferometric radio signals, called "fringes," from the sky with the first three, recently completed, full-scale Low Frequency Array (LOFAR) stations. ... Only registered members of Astronomy.com are allowed to comment on this article. ...

... SMIS ] . noise temperature of the low noise amplifier less than 100 K . automatic frequency and polarization adjustment of the received signal . double transform of frequency . power supply: single phase, 220 V, 50 Hz . power consumption: less than 30 Wt . the unit measures: 470 x 300 x 130 mm . weight: less than 10 kg . ... Back to SMIS Home Page . ...

... Editor's note: This activity is both on the Astrocappella web site and the CD-ROM featured in this article. ... Every student can demonstrate the Doppler effect! ... splash out' ball** . ... Twist the 'splash out' ball open. ... This effect can occur with both sound and light, because both sound and light reveal wave- like behavior. ... The number of waves reaching an observer in one second is called the frequency. ... What has the Doppler shift told astronomers about the expansion of the universe? ...

... Left: A POSSM plot of the uncalibrated spectrum of DA 193 at 1.66 GHz on a baseline Bear Lakes to Noto. ... The phase slope as a function of frequency is clear evidence for a small delay error in the correlator model. Right: The same data as shown on the left, but corrected for a delay error and a residual fringe rate. ... Left: A VPLOT plot of the uncalibrated amplitude (upper frame) and uncalibrated phase (lower frame) as a function of time for the source DA 193 on a baseline HartRAO to Noto. ...

The observation of active regions with RATAN-600 and the Beijing Astronomical Observatory spectrograph in the decimeter wave band shows an existence of a long-term non-thermal emission of active regions in continual (a halo) and flaring (flares and micro flares) components. The observation-compatible models have been devised specifying the nature of continuum as a radiation originating in the non-linear interaction of plasma waves at the upper-hybrid frequency. ...

... 13, Moscow 119992, Russian Federation, e-mail: busarev@sai.msu.ru; 2 Research Institute Crimean Astrophysical Observatory, p/o Nauchnyi, Crimea 334413, Ukraine, e-mail: prok@crao.crimea.ua Summary: We propose a combined method of astronomical investigations of small or distant planets incorporating registration of a set of integral spectra of an object and their frequency analysis. ... An application of the method is shown on example of asteroid 21 Lutetia. ... 6] Busarev V. V. (2002), Solar Sys. ...