Next: Data Selection Up: State Previous: Units, Doppler and Frequency . ASAP reads the line rest frequency from the RPFITS file when reading the data. ... Select for specified source/IF ASAP> scans.set_restfreqs(freqs=1.667359e9, source='NGC253', theif=0) # Select for all sources and IFs ASAP> scans.set_restfreqs(freqs=1.667359e9) . ... Set rest frequency for all IFs ASAP> scans.set_restfreqs(freqs=[1.6654018e9,1.667359e9,]) . ...

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• List of Frequency File Parameters
• AIPS Frequency Bugs
• Frequency Catalog

Next: A Simple Example With Up: CHIRPLET TRANSFORM SUBSPACES Previous: CHIRPLET TRANSFORM SUBSPACES . We begin by discussing the CF plane, and then present an argument for re-parameterizing this plane in terms of two frequency indices, leading to what we will be calling ``frequency-frequency'' (FF) analysis. ... Computing the CF plane of a signal, s ( t ), is equivalent to correlating the signal with a family of chirps that are parameterized by chirprate, c and center frequency, . ... Figure 7 . ...

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• Frequency/duration relation.
• Warbling Chirplet: Analysis of Signals of Oscillating Frequency
• Time-Frequency-Scale Volume

spaceweb@oulu.fi - last update: 24 November 1998, 1335 UT . Radiowave Frequency Ranges . ... Extremely Low Frequencies . 30 - 300 Hz . ... 0.3 - 3 kHz . ... Very Low Frequencies . ... Low Frequencies . ... High Frequencies . ... 0.3 - 3 GHz . ... The International Telecommunication Union (ITU) has defined the radiowave frequency ranges as shown in the table. ... Their high frequency limit corresponds to magnetospheric ion gyrofrequencies (which are low because of small B and high m). ...

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• Auroral Frequency Map by Hermann Fritz
• Auroral Frequency Map by Elias Loomis
• ULF waves [Oulu]

Next: Structure of the Galaxy Up: Model of the Galaxy Previous: Model of the Galaxy . As discussed above (Section  6 ), galactic binary systems are assumed to be distributed logarithmically along their semi-major axis A (Abt and Levy, 1976[ 2 ]), . ... Figure 40: Number of binary stars per frequency decade. ... As the observed distribution of binary periods is flat (equation ( 15.3.1 )), the normalization constant is the total number of galactic binaries per frequency decade: . ...

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• Critical Frequencies and Gravitational Wave Detector Halfwidth for
• Gravitational waves from supernova explosions
• Amplitude Distribution

. This is the CIMA smart frequency switching menu: . The following is the on-line help page for smart frequency switching: . You can return to the main CIMA page by clicking here .

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• Frequency Switching
• Frequency Coordination
• Radio Frequency Interference (RFI)

... HST . ... Home . ... Data . ... HST Peer Review Process . ... WFPC2 Home . ... Instrument Home . ... Calibration . Calibration Home . Calibration Plan . ... LRF Data . ... Data Analysis . Data Analysis Home . Data Analysis Library . ... Instrument Handbook . Data Handbook . ... Dither Handbook . ... Input "Frequency 0 " in relation: Flux = Flux 0 ( Frequency / Frequency 0 ) -(Spectral Index) . ... Values above 10 7 are taken to be frequency in Hz. ...

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• The Kepler Mission: A Photometric Mission to Determine the Frequency of Inner
• Frequency of Debris Disks around Solar-Type Stars: First Results from a Spitzer
• New observations of 53 Persei

Site Map . ... Glossary . Timeline . ... Magnetic Field . ... Aurora . ... 3a. Loomis Aurora . 3b. Fritz Aurora . ... Hermann Fritz . Shown here is a map of the frequency with which auroras are seen, produced in 1881 by the German scientist Hermann Fritz (1830-1883). The line of greatest frequency lists 100 auroras per year, while in the center of the pattern auroras are much less frequent. ... Timeline Expanded timeline Glossary . ...

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• Auroral Frequency Map by Elias Loomis
• Low-frequency electromagnetic sounding instrument for subsurface studies

Next: Analysis in the Up: MIDAS utilities for Previous: Fourier analysis . For the detection of smooth signals, e.g. sinusoids, use either SCARGLE/TSA or AOV/TSA with bins. ... SCARGLE/TSA -- . Scargle sine model: This command computes Scargle's (1982) periodogram for unevenly spaced observations x . ... In this way, the command can be used to perform a CLEAN-like analysis manually by removing individual oscillations one by one in the time domain (see Roberts et al. ... AOV/TSA -- . ...

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• Multiresolution with scaling functions with a frequency cut-off
• Multi-Frequency Study of the B3-VLA Sample
• The RATAN SNRs Survey

... Science Users Information > Science Activities > Instrument Commissioning > HARPS Laser Frequency Comb . ... HARPS Laser Frequency Comb . ... The first commissioning run of the HARPS Laser Frequency Comb ( LFC ) was held from 8 тАУ 17 April 2015. ... During this commissioning, the emphasis was mainly on calibration but several science spectra were acquired: four asteroids and twenty stars were repeatedly observed to monitor their radial velocity variations and to compare with published data. ...

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• Oscillation frequencies in the giant star xi Hya | ESO
• Mario van den Ancker
• Laser frequency comb installed on HARPS | ESO

Next: A ``long'' FFT Up: *fft* - Period search Previous: A ``short'' FFT . xt> fftplot input table file: rp90_fft A plot of Fourier coefficient value vs. frequency will appear on screen. To make hard copy, type = with cursor within plot, to return cursor to command window, type q. Note: The plot is set to autoscale and will display the largest coefficient. ...

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• False Alarms and Aliasing
• The AstroStat Slog use
• The AstroStat Slog misuse

... The minimum precision occurs at x = 0.1 and is approximately equal to precision(1d0)-1. subroutine getBBfluxPerHertz(hertzValues, kelvin, powerValues) real(double), intent(in) :: hertzValues(:), kelvin real(double), intent(out) :: powerValues(size(hertzValues)) end subroutine getBBfluxPerHertz function bbFluxPerHertz(hertz, kelvin) result(power) real(double), intent(in) :: hertz, kelvin real(double) :: power end function bbFluxPerHertz . ...

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• Black Body routines

Next: Anatomy of a decline Up: Physical Characteristics Previous: Pulsations . The most obvious and spectacular properties of RCB stars are their dramatic fading events. ... The ratio between the characteristic interval between fades, and the typical pulsation period of RCBs implies that a decline occurs about once every twenty pulsation cycles. ... Next: Anatomy of a decline Up: Physical Characteristics Previous: Pulsations Simon Jeffery . ...

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Blackholes2 Forum Message . Forums: . ... Discussion Forums | ... The Universe Is Controlled By Zero Frequency Gravitons . Forum List | ... Post Message | ... In other words the universe is controlled by Static gravitational fields- that's the classical theory. ... www.astronomy.net . About Astronomy Net | Advertise on Astronomy Net | ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

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. The frequency of the spectral maximum f m of the gyrosynchrotron emission vs. the power-law index of the electron spectrum calculated according to Dulk & Marsh (1982). Curves are shown for various column densities LNe of accelerated electrons and magnetic field strengths B . The angle between the line of sight and the magnetic field is 45 degree.

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• Non-traditional methods of geophysical investigations and active plasma
• Oct-Nov 2003: Radio
• CMEs and Space Weather

Multi-Frequency Synthesis in K-band . The Multi-Frequency Synthesis (MFS) permits to realize a good quality imaging of the continuum radio sources in short time. ... The RadioAstron mission will operate one K-band circular polarized channel at fixed frequency 22,232 GHz. ... In general one K-band RadioAstron channel with fixed frequency will be unchanging and compatible with all the ground radio telescopes. ... Progress of the RadioAstron Project in Pictures . ...

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• MEMORANDUM
• ОТЧЕТ

. 2012 . 2013 . 2014 . На предыдущую страницу . На первую страницу

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• Dual-band block frequency conversion of signals

... LO frequencies were 1/2, 1/3 and 1/8 of signal frequency 75 GHz. ... But single junction SIS mixer has 30 dB input signal power range only [ll and it may decrease at high frequencies more than 200 GHz due to Josephson and 1 "switching" noise rise [2 e Our experiments show that subhurmonically pumped SIS mixer may have improved saturation power and reduced noise at high frequencies in some operation modes. ... 269 Fig.2 Quantum for LO and signal frequencies SIS operating mode. ...

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• http://www.cplire.ru/html/lab234/pubs/2005-21.pdf
• http://www.cplire.ru/html/lab234/pubs/2014_19.pdf
• http://www.cplire.ru/html/lab234/pubs/2011_12.pdf

... Астронет | ... Словарь | ... Термин "frequency" . frequency : . частота . frequency of flare occurrence : . ... frequency of observation : . рда.) частота наблюдения (частота, на которой ведутся наблюдения) . frequency of occurence : . частота появления (напр. вспышек) . ... angular frequency : . ... astronomical radio frequencies : . см. radio-astronomy frequencies . ... центральная частота (напр. полосы частот) . ... microwave frequencies : . ... radio frequency : . ...

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• Journal "Peremennye Zvezdy"
• Journal "Peremennye Zvezdy" ASAS 090446-5625.1 ASAS 091455-6401.6 ASAS

Frequency Range (424kb) , sound clip demonstrating what different frequencies sound like. Frequency Differences (672kb) , sound clip how small a difference in frequency the ear can distinguish. Two Notes: Frequency differences (848kb) , sound clip demonstrating what combining two notes with similar frequencies can do. ... Emission line widths (844kb) , how the sound of an emission line varies as the width of the line is increased. ...

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• The Maths
• Sounds of the Universe
• ASTR1001 “Astrophysics” Assignment 1

... 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. ...

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• Astrophysics Group VLSS
• Bojan Nikolic -- Anomalous dust emission in NGC 6946
• Bojan Nikolic -- RNested -- V0.2 released and vignette on fitting of spectra of