... Many Miriad tasks support on-the-fly selection and averaging of the channels to be processed. ... Channel-0' data (data formed by averaging all spectral channels together) are also treated as continuum data. ... For the spectral data, if the channel number does not correspond reasonably directly with velocity ( e.g. if Doppler tracking was not used), then it might be desirable to resample the spectral data at equal increments in velocity. ... channel . This gives raw or averaged spectral channels. ...

... 1 available ; Nd:YAG based laser transmitter; 24 W average power (100 MW peak power ) at 532 nm; Additional output at 1064 nm fundamental (currently 355 nm is not available ); 6 ns pulse width; 40 Hz operation; 80 cm diameter Cassegrain telescope receiver; Fully pointable (but generally aircraft restricted to within 45 o of zenith; Electronic gated photomultiplier tube detection with low-altitude chopper; Data collection is ... F. Airglow Mirror Systems: . ...

An internal flat field system provides reference flat field images over the spectral range of WFPC2. These are provided by a "calibration channel" optical system mounted outside the main shroud of WFPC2. ... The flat field illumination pattern is fairly uniform for wavelengths beyond about 1600 . Short of 1600 the flat field is distorted due to refractive MgF 2 optics. ... The calibration channel is used primarily to check for internal instrumental stability. ...

Next: Quantum Efficiency Correction (a.k.a. Up: ROSAT HRI Recipes Previous: Appearance of new HRI . The mean pulse height analyzer channel (PHA) of a spectral distribution will vary depending on its location on the detector. Below is a method to compare observed data with that of preflight calibration measurements. ... For temporal gain variations, see The HRI Calbration Report . ... Retrieve the gain maps (mean PHA) from anonymous ftp at SAO. ... But don't forget temporal gain variations!] ...

Integration and performance of the flight configuration SIR on TELIS P. Yagoubov1, G. de Lange1, A. de Lange, M. Romanini, R. Hoogeveen1, V. Koshelets2, G. Wagner3, M. Birk 1Nation 3 al Institute for ... Netherlands 2Institute of Radio Engineering and Electronics, IREE, Russia 3Institute for Remote Sensing Technology, DLR, Germany Abstract TELIS (Terahertz and submm Limb Sounder) is a cooperation between European institutes, DLR, RAL and SRON, to build a three- ... LO frequency 624.93 GHz. ...

INFRARED FOURIER-SPECTROMETER SICH-F . ... Instrument work regimes: 1) Inside. 2) Calibration at inside standard sources 2 - 4 times per a rotation. 3) Calibration at "free space" 2 - 4 times per a rotation. 4) Infrared radiation measuring 10 - 40 min. per a rotation. ... Spectrometer consists of the photodetector block and the block of signal processing and control. ... Diagnostic information and attach data will transfer by state telemetric channels. ... Detector temperature. ...

Image analysis of the VLBI experiment INTAS99.4 . PI: I. Molotov (GAO, Russia) . Analyst: A. Pushkarev (GAO, Russia; CrAO, Ukraine) . ... Frequency: 1.66 GHz . ... Antennas and their characteristics at 1.66 GHz . ... Bear Lakes (Russia) . ... Svetloe (Russia) . ... Pushchino (Russia) . ... CALIBRATION . Amplitude Calibration . Phase Calibration . ... 0420-014 . ... Quasar . ... 0420-014.gif . ... 0420+022 . ... 0420+022.gif . ... 0552+398 . ... 1308+326 . ... 1345+125 . ... 1803+784 . ...

... C ALIBRATE V ISIBILITY : Select PLOT, and flag first the channels since their SNR is usually very low (if you observed with the 3-way system; the 6-way system has only 16 channels). To do this, plot VisSq vs channel, selecting all channels and the All-in-1 option. Then, for calibration, look at the data from the calibrator stars (select them using the information in the StarForm), then select CALIBRATE to display the calibration widget. ...

. Next: Calling Parameters Up: broadeningDistribution Previous: broadeningDistribution Contents . A probability is calculated for a given wavelength, dispersion angle and order, according to . where is the width of the spectral channels in dispersion angles, is the groove spacing of the gratings, is the spectral order, is the wavelength, and is the dispersion angle for unscattered light. The function returns a flat distribution of channels, with constant probability per channel of . Michael Smith 2011-09-20

... Solar flare activity is produced by the processes of accumulation and release of energy in an active region. ... In the framework of study of solar active regions, producing powerful flares the researchers from the RATAN-600 radio telescope have detected sources with features in the form of a sharp drop in the intensity of polarized radiation in various parts of the recorded frequency range (2-16GHz), sometimes changing the sign of polarization. ...

Note: a new task -- "FLOPM" -- is available in recent versions of AIPS (31DEC07 and later), which also reverses the order of spectral channels, making UVFLP as described below unnecessary. ... UVFLP (to re-order channels in GMRT LSB uv data files within AIPS) ================================================================== To flip the oder of spectral channels in uv databases in AIPS. ... 1) Original data: 128 <--- channels <--- 1|1 ---> channels ---> 128 ------------------------|- LSB | ...

Some Effects of Earthquakes, Temperature, Wind Stor ms and Barometric Pressure on the Inter ferometer at Hanford Robert Schofield Masahiro Ito Rauha Rahkola Evan Mauceli Ray Frey David Strom Jim Brau University of Oregon Some Concerns With Low Frequency Influences · Loss of lock · Need for increased servo loop gain · May eat up actuator range · Possible increased background in the LIGO frequency band · Possible modulation of noise in the LIGO band Guralp ...

RATAN-600 Radiometer = 49 cm . The radiometer has not a wideband channel because of the electromagnetic interferences at receiving frequency range. ... Central frequency . ... 542 - 558 . ... 558 - 574 . ... System noise temperature . ... Noise Added Radiometer . ... Feed . Three-frequency feed with matched phase center (the same for 13 and 31 cm) . Polarization . ... Noise generator . ... NG1 - noise generator for calibration, . NG2 - balance noise generator, . ... Unit 1. ...

This instrument is a spectometer with . ... maximum resolution of 40 Hz (8.4 m/s at 1.4 GHz) . ... The control software has been developed using Object Oriented analysis and modelling techniques ( Arcetri report 3/98 ). ... n. 3/93: ARCOS - Arcetri Correlation Spectrometer: Clock Generation module . n. 13/93: ARCOS - Arcetri Correlation Spectrometer: Project status report . ... n. 3/98: Software Analysis for the Arcetri COrrelation Spectrometer . ...

... Wavelength Calibration . ... 30s wavecal plot . 30s flatfield plot . ... HeNeAr 4400 . B rQrtz 4400 . ... HeNeAr 4500 . ... BrQrtz 4200 . BrQrtz 4500 . ... These figures in the above table show the number of counts received from each of the lamps in a 30 second exposure with the 1.5 arcsec slit. ... Users have the option of taking calibration lamp data at the rotator angle of each object, but in many cases, it should be possible to measure the shift using observations of night sky lines. ...

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 -- . ...

... Several attempts to discover the FICN signal in VLBI nutation series made during last years failed. ... We investigated several VLBI CPO series by means of spectral and wavelet analysis. It has been shown that there are several periodic signals with close amplitude around the expected FICN period without any prevailing one that can be reliably associated with the FICN. ... DATA ANALYSIS We analyzed several CPO series obtained in IVS analysis centers by means of spectral and wavelet analysis. ...

... The results are used in quasireal time by the observing process, but also as input by hardware quality control, by the dynamical scheduler, and by the Science Pipeline. Among processing operations are the calibration of the atmospheric absorption, of phase radiometric correction, of pointing scans, of phase and amplitude reference measurements, .. ... Using the last few measurements, we will determine a provisional amplitude calibration curve (to be also used by the Quick Look pipeline). ...

... indices rather than retrieve abundances: 1.2, 1.5, 2.0 µm · Work with calibrated radiances rather than relative spectra · Ad hoc atmospheric corrections Spectral index : S( ABCD) - S1 Index = S( ABCD) Correction on atmospheric absorption ·MOLA topography ·CO2: p,T ­ from European Mars Climate Database ·H2O column (Ls, ) - from TES observations ·H2O (, l, z) ­ from GFDL MGCM model ·HITRAN(2004) OMEGA DETECTOR C Wavelength,µm Errors and uncertainities ...

. 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.