... Optionally it can perform a joint deconvolution with a single dish image as well. Key: map Two to five input images. ... Key: beam One or perhaps two input dirty beams. ... The second dirty beam (which must be given if there are two dirty map inputs) gives the point-spread function of the single dish dirty map. ... Key: rmsfac PMOSMEM must be able to the theoretical rms noise of the input dirty map(s), and will, by default, attempt to reduce the residuals to have the same rms as this. ...

... As any interferometer, even those with spectrometers, measure the visibilities integrated over band passes of non-negligible widths, computes model visibilities on a grid of wavelengths. The results (visibilities, fluxes) are then integrated over wavelength, whereby special attention needs to be payed to the averaging corresponding to what the instrument actually does. ... The choice of grid is made in function calcmodel , for each spectrometer. Christian Hummel 2015-04-28 ...

ALMA | ... In this section, we explain why we need to correct phase fluctuations and ALMA's strategy to do this. Rapid fluctuations will be corrected with water vapour radiometers (WVRs). The Cavendish Astrophysics Group was also a leading contributor to the ALMA prototype WVRs, which were put through their paces in tests at the Submillimeter Array (SMA). ... The Cavendish Astrophysics Group in partnership with the Onsala Space Observatory built two prototype WVRs for the ALMA project. ...

Some recent results ( see ) attracted the attentions of astronomers working on field which could benefits from photon counting techniques with high speed and spatial resolutions as adaptive optics. ... Fasti has been designed to be fast and largerly configurable. ... The data rate attined in the best case (30 Mhz), give no impossible load to the digital acquisition in the photon counting mode, since data are 1 bit only, they can be parallelized, giving a maximum speed of about 940.000 32 bit word/sec. ...

Next: Reduction procedure Up: Extinction and transformation Previous: Strategy . Standard stars can be included in the extinction solution, if one is careful. The problem is that there are usually appreciable ``conformity errors'' due to mismatch between the instrumental and the standard passbands [ 16 ]. ... Thus, it is wrong to assume that the transformation between the instrumental system and the standard system is exact, even if there were no measurement error in either system [ 1 ]. ...

XMM­Newton CCF Release Note XMM­CCF­REL­274 OM Photometry. Time dependent sensitivity degradation correction: updating the coe#cients A. Talavera May 12, 2011 1 CCF components Name of CCF VALDATE List of Blocks changed CAL VERSION XSCS flag OM PHOTTONAT 0005 2000­01­01T00:00:00 DEGRADATION No 2 Changes The table extension ``DEGRADATION'' was introduced in 2006 to contain the coe#cients of the time dependent sensitivity degradation correction. ... Table 1 gives both old and new coe#cients. ...

Collection of the orbital elements | ... The errors of the spacecraft motion extrapolation outside the measuring time interval were estimated by using the comparison of SC positions calclulated by the forward integration ( extrapolation method) and backward integration ( interpolation methods). ... The character of these time shift of the ascending nodes ( D Tn) corresponds to the orbiting period errors, which arise during SC motion extrapolation outside the measuring intervals. ... INTERBALL mission ...

Arecibo Upgrade Notes INSTRUMENTAL POLARIZATION : POLARIZATION ISOLATION ERRORS IN STOKES PARAMETERS Jim Cordes Joe Lazio 22 May 1996 Summary The purpose of this memo is to: 1 demonstrate how polarization isolation is related to errors in Stokes parameters ; 2 estimate a tolerable level of errors in Stokes parameters due to amplitude and ... There we had a level of cross coupling that gave about 10 errors in Stokes parameters. ...

... Purpose: The purpose of this program is to monitor the sensitivity, wavelength and detector calibrations of Side 2. Description: Four times per year (twice in Cycle 6) the following observations will be done: . ... SENSITIVITY MONITORING . ... Fraction of GO Programs Supported: All GHRS programs using gratings G160M (19%), G200M (7%), and G270M (15%). ... Observation: Internal-16 orbits (8 orbits for each of the 2 executions. Note: the internal orbits are full orbits). ...

THE PARAMETERS INVOLVED IN HAPKE'S MODEL FOR ESTIMATION OF THE COMPOSITION OF THE EJECTA LUNAR TERRAINS. ... In the previous papers we were estimated the surface roughness of the ejecta lunar terrains by means comparison of the local phase function and the average integrated lunar indicatrix. ... The Hapke's theoretical model of the lunar surface reflection. ... For THE PARAMETERS INVOLVED IN HAPKE'S MODEL: S.G. Pugacheva, V.V. Shevchenko a low-albedo lunar surface parameter Bo = 1. ...

... Integrated superconducting submm receivers and spectrometers. ... Development, study and optimization of the superconducting phase locked Local Oscillator for integrated spectrometer. ... Superconducting Integrated Submm Spectrometer for Laboratory Applications. ... Development, study and optimization of the superconducting phase locked Local Oscillator . ... The objective is to develop and study a superconducting Local Oscillator (LO) for an integrated submm spectrometer . ...

function pottasch, emis , logt ,z=z, ion = ion , level = level , wdth = wdth , trange = trange ,$ _extra=e ;+ ;function pottasch ; returns the Pottasch factor that is a measure of the width of ; the ion emissivity in temperature space over which most of ; the line emission occurs. ; ; the Pottasch factor is the ratio ; {\int [ EMIS * ION _BALANCE] dlogT}/{ WDTH *max([ EMIS * ION _BALANCE])} ; where ...

... P. Mar?chal, E. Anterrieu, and A. Lannes . ... Full attention is devoted to the Fourier synthesis operation, which proves to be the central issue with regard to the global problem. ... Recently, a new Fourier synthesis method has been developed for radio imaging and optical interferometry (Lannes, Anterrieu, & Bouyoucef 1994, 1996; Lannes, Anterrieu, & Mar?chal 1997): WIPE|. ... We now turn to the unification of WIPE| with the methodologies mentioned in ? ...

Nikolay Gusev: Summary In many cases mathematical treatment of liquids is done in the framework of incompressible fluid. ... Therefore it is reasonable to study the equations of low compressible fluid motion, in particular, convergence of their solutions to the corresponding incompressible limit. To emphasize the fact that the fluid is low compressible one should introduce a parameter which represents a measure of compressibility. ... Regularity and uniqueness of the solutions in dimension 2. ...

MAIN CHARACTERISTICS BASIC MODIFICATIONS TEST RESULTS . ... integrated drop tests in order to verify the strength of DM modified shell and equipment attachment points, functional check of new chairs and DM structure, determination of shock impacts onto the crew to verify landing safety; . ... nominal landing with the main parachute system (MPS) - drop #1 took place on December 24, 1998; . ... reduction of shock g-loads values at landing in accordance with decrease of landing speeds. MAIN | ...

Once students get the hang of it, they can find and measure the brightness of Delta Cephei in a few minutes. ... of Delta Cephei . ... Oct. ... The following table lists the measurements of Delta Cephei made by one amateur astronomer in autumn 1990. ... 4.0 . ... This activity is a simplified version of one that appeared in Hands-On Astrophysics, a series of activities prepared by the American Association of Variable Star Observers with support from the National Science Foundation. << previous page | ...

... FIELD | ... static int . ... Field Detail static final int AREA . ... Constant Field Values . static final int MEAN . ... static final int STD_DEV . ... static final int MODE . ... static final int MIN_MAX . ... static final int CENTROID . ... static final int CENTER_OF_MASS . ... static final int PERIMETER . ... static final int LIMIT . ... static final int RECT . ... static final int LABELS . ... static final int ELLIPSE . ... static final int INVERT_Y . ... static final int CIRCULARITY . ...

... Exposure Time Calculator (ETC) . Survey processing . ... VISTA is a 4-m class wide field survey telescope for the southern hemisphere, equipped with a near infrared camera (1.65 degree diameter field of view at VISTA's nominal pixel size) containing 67 million pixels of mean size 0.34 arcsec and available broad band filters at Z,Y,J,H,K s and a narrow band filter at 1.18 micron. A wide field visible camera, if constructed, could also be used on VISTA. ... Tile . ... ESO VISTA Public Surveys . ...

... 8, ``Celestial Mechanics'', 2002 Solution stabilization algorithms for the estimation of small bodies orbital parameters L. E. Bykova, V. P. Titarenko Tomsk State University, Tomsk, Russia Sometimes there is not enough information for the correct improvement of the orbits of the Solar system small bodies. ... Algorithms have been constructed on the basis of a linear least squares method using additional a priori information about the solution. ... E., Hanson R. J. Solving Least Squares Problems. ...

... A measure of the success of the web-site is the annual number of distinct e-Visitors (DEVs) to Armagh, in fact the number of distinct hosts served by the Observatory's web-site. ... During 2003, the numbers of successful page requests (i.e. `hits') to files of all types on each of the three web-sites listed were 3,983,000 (7-month's data), 890,000, and 675,000 respectively, whilst an estimated 470,000 Distinct e-Visitors visited the three web-sites during the year. ... 80,000 . ... 134,000 . ...