... Exposure Time Calculator (ETC) . ... ESO - Public Surveys . ... the recommended values to use for DIT, . ... Detector on-chip integration (DIT): seconds. to your chosen value - a separate page gives recommended values to use for DIT - for modes 1 and 2 below you may wish to start with the maximum recommended values as these will minimize the effect of read noise (a total object exposure of Y secs with DIT=X secs will produce Y/X lots of read noise) and give you a lower limit on the time needed. ...

... Data . ... News and . ... HST Overview . Overview . ... Retrieving HST Data . ... COS Data Handbook . ... On September 18, 2013, the COS team delivered a new time-dependent sensitivity (TDS) reference file (x9h1254fl_tds.fits) which more accurately characterizes the rate of sensitivity loss observed since November 2012. The relative flux accuracy with the new TDS files is 2%, with the exception of a discontinuity of up to 4% between data taken before and after March 23, 2012. ...

... How much energy is there in a 20 mph wind? . 20 mph wind =10 m/s .0006 * 10 3 = .0006 * 1000 = .6 KILO watts per square meter . ... In your back yard the average wind speed is 10 mph which yields 100 watts per square meter. ... 4 3 = 64 if a 10 mph wind gives you 100 watts per square meter then a 40 mph wind gives you 64 times more power per square meter 6400 watts per square meter . total power = 6400 watts per square meter * 2 square meters = 12800 watts = 12.8 Kilowatts this is a lot! ...

... 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. ...

Next: A Gravitational Wave Map Previous: Critical Frequencies and Gravitational . In this section we consider the GWB spectrum as such, that is, we study how dimensionless strain metric amplitude h is dependent on frequency. For a sample of N independent binaries emitting GW at a given frequency the net result is . ... are, respectively, effective distance to the sample and effective mass of the binaries (in solar units) producing the GW radiation at the frequency . ...

Next: Splitting and Imaging Up: Primary Beams and Mosaicing Previous: Some Additional Tools . The individual approach images, deconvolves, self-calibrates and restores each pointing separately. ... With the `individual approach', it is possible to deconvolve sources (and thus eliminate their sidelobes - which is the important issue) beyond the limit where Miriad 's primary beam model gives up. ... Splitting and Imaging . Deconvolution, Restoration and Self-Calibration . Image Combination . ...

... The following script will create an individual qpoe file (64x64 pixels) for each obi, with the filename containing the obi number. ... This script will then produce smoothed image files and send a contour plot to either the screen or the printer. ... On rare occasions, it may be useful to examine each phase bin visually to evaluate the segments in order to decide if some should be deleted before restacking for the final result. ... The qpoe file will be named by obi and phase number. ... phase_eval ...

... The processing of these associated images presents new challenges to the HST data processing pipelines, which heretofore operated only on single images. ... Stage 1 (CALNICA) calibrates individual exposures without information from other members of the association. ... Stage 2 of calibration (CALNICB) only operates on associated images that have previously gone through CALNICA processing, and creates combined images for each distinct (non-overlapping) pointing within the association. ...

... First, there is a set of residual plots against airmass for each night. ... If you reply ``YES'', it will show you some plots intended to help you distinguish between time-dependent extinction and time-dependent zero-point drift. ... Figure: Sample drift plot . The principle behind these plots is that time-dependent extinction produces errors (and hence, we hope, residuals) that are proportional to airmass; but instrumental drift produces residuals uncorrelated with airmass. ...

This negative photo shows the faint image of periodic comet Halley (in the circle) at the record heliocentric distance 18.82 AU (= 2,820 million km, about the distance of Uranus). ... They were cleaned to remove various sky and instrumental noise, shifted according to the predicted motion of the comet and then co-added. ... The position in the sky is less than 1 arcsec from that predicted on the basis of the comet's very well-determined orbit. ... Total exposure time: 13,500 seconds. ...

... In each room, the ash and rubbish is checkedтАж . ... Title: In each room, the ash and rubbish is checked for relics of use, the barrowed into individual piles, one per room. ... In each room, the ash and rubbish is checked for relics of use, the barrowed into individual piles, one per room. ...

... About ISSP . ... MOBILE INSTALLATION FOR PRODUCING OF . A THERMALLY SPLINTERED GRAPHITE SORBENT . ... The installation and technology elaborated in the ISSP for producing of a thermally splintered graphite sorbent (TSGS) enable obtaining absorption coefficient values from 60 g/g to 100 g/g. Moreover, the TSGS is an absolutely hydrophobic material and collected oil products may be used as high effective fuel. ... The produced installation is tested on the Т?East-WestТЛ oil-pipe line. ...

IBIS Data Analysis . ... IBIS . ... Flat Fielding - Introduction . The images obtained by IBIS will have intensity variations across the field of view that are not due to the solar image, but rather caused by instrumental effects that alter the observed intensity in each point of the field of view. ... IBIS Flat Fielding Techniques . ... Therefore, it is desirable to obtain the flat field measurements center on a point along the equator near the heliographic center of the solar disk. ...

... INTRODUCTION Some Analysis Centers in Russian Federation such as Information-Analytical centre of positioning, navigation, and timing (IAC PNT) TSNIIMASH, Mission Control Centre (MCC), High-precision ephemeris and time correction estimation system (HETCES/SVOEVP) as well as a number of Analysis Centers of the International GPS Service for Geodynamics (IGS) are producing daily precise orbits and time corrections of GLONASS satellites. ... Calculation of weights of both the Centers and the satellites....

... Image Quality of the VLT . Total Optical Control . First light for the ESO VLT unit telescope 1 occurred during the workshop. ... The image shown (Figure 1 ) here was obtained with the VLT on May 16, 1998, in red light (R band), i.e. while the mirror was still uncoated. ... In this diagram (FIgure 2), the measured image quality of the VLT UT1 astronomical images is plotted versus the ``seeing", as measured by the Seeing Monitor, a small telescope also located on top of the Paranal Mountain. ...

In the Table below the masses of some asteroids which were determined during the last years are listed. ... The listed values were determined from observations of many test bodies by the weighted least square fit for one perturbing mass and corrections to the orbit elements of all used test bodies. ... based on the observations of 98 asteroids (including 50278) with the values of standard error of mass determination less than 3.0 10 -11 M Sun . ... Mass . ... 3) Mass 121 : 0.74 x 10 -11 M Sun ; . ...

... While Comet McNaught ruled southern skies, last week's conjunction of the Moon and Venus could be enjoyed by denizens of both hemispheres of planet Earth. ... To the surprise of many Northern Hemisphere observers, the tail of Comet McNaught remained visible even after the comet's head set ahead of the Sun. ... Comet McNaught, the Great Comet of 2007, has grown a long and filamentary tail. The spectacular tail spreads across the sky and is visible to Southern Hemisphere observers just after sunset. ...

On April 14, 2000 UT a series of Shack-Hartmann measurements were made at varying altitudes. ... The tilts and sags shown are those given by the normal Shack-Hartmann analysis. ... Without this feedback, off-telescope tests showed positioning errors on the order of 10 arcseconds in the secondary mirror position. ... Tilt M2 Bk by X" . ... The coefficients m1 through m3 need to be added to those that are currently in the TCC to correct for the secondary translation with respect to the primary. ...

Proposal Identification No.: T2567 Date Received: 2010-Jan-29 15:41:05 Technical Page Proposal Type: General Category : Observation Category : Total Time Requested: Minimum Useful Time: Prop osal Title: ABSTRACT: Regular Terrestrial Aeronomy HF Heating experiment 40 Hours two Creating Space Plasma from the Ground It was predicted ( Carlson , 1993) that once high power HF transmitters achieved the Giga-Watt ERP level, they would from the ground produce plasma ...

This page should contain a form to pass parameter value for a program producing figures illustrating the dependence of optical properties of different scatterers on their parameters. Specify the parameters and press start calculation button to produce a figure. ... Independent variable: x v a/b alpha Re(m)? another? ... Number of curves: 1 2 3 . ... Curve #1: . Particle shape: sphere spheroid another? TE/TM mode: TE TM . Other parameters: x= Re(m)= Im(m)= a/b= alpha= . ...