Position Switching Separation Tolerance with Arecibo in L-Band Travis McIntyre The University of New Mexico July 2010 Revised December 2013 Abstract The blocked telescope aperture at Arecibo creates standing waves in the bandpass around 1MHz. ... Test observations with Arecibo in L-Band show that position switching effectively removes standing waves for separations of one half FWHM or less. Standing waves remain for separations of one FWHM, increasing the rms of the baseline by 20%. ...

The best way to explain what the logical actors are, is to consider an example. ... An example of logical actors (the Actors.A program). ... The principle of logical actors. -- ------------------------------------------- project : (( 'Main' )) ------------------------------------------- class 'Main' specializing 'Dialog': -- identifier = "input" ; x = 27 ; y = 8 ; -- i; j; -- w1 = ( 'TextPage', value_1=i, value_2=j, text_color='White', background_color='Red', x= 9 , y= 4 ) ; . ...

... The experience of determination of the link between radio sources and dynamical reference frames is presented. To obtain this connection we used a series of very long baseline interferometry (VLBI) observations of the spacecraft Phobos-2 and angularly nearby quasars. ... The dynamical reference frame is determined by equator and equinox of these ephemerides. ... References . ... The relative orientation of the radio and dynamical reference frames can be described by a sequence of three rotations . ...

IRAF/STECF 2-D spectrum point source / background decomposition package . ... The general problem is one of spectral decomposition - of separating the spectra of the point sources from the background. ... The STECF IRAF layered package "specres" provides two tasks to extract point source spectra from 2-D images (either longslit, multislit or cross-dispersed) and decompose the full background over the image. ... A Point Source Function spectrum image is required as a 2-D spectrum. ...

Next: The root filesystem Up: Overview of the Directory Previous: Overview of the Directory . This chapter is loosely based on the Linux filesystem standard, FSSTND, version 1.2 (see the bibliography, [ Qui95 ]), which attempts to set a standard for how the directory tree in a Linux system is organized. ... This chapter does not explain all files in detail. ... The major parts are the root, /usr љ , /var љ , and /home љ filesystems (see figure 2.1 ). ... Figure 2.1: Parts of a Unix directory tree. ...

... Apache HTTP Server Version 2.4 . Apache > HTTP Server > Documentation > Version 2.4 > Rewrite . ... It describes how you can use mod_rewrite to create dynamically configured virtual hosts. mod_rewrite is not the best way to configure virtual hosts. ... Virtual Hosts For Arbitrary Hostnames . Dynamic Virtual Hosts Using mod_rewrite . ... RewriteEngine on RewriteMap lowercase int:tolower RewriteCond ${lowercase:%{ HTTP_HOST }} ^www\. ([^.]+) \.example\.com$ RewriteRule ^(.*) /home/ %1 /www$1 . ...

... Tonight's Sky . ... The Magazine . ... Observing . ... Star Atlas . ... stars . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Astronomy for Kids . ... Observing springtime deep-sky objects with a large telescope . ... How do astronomers determine the ages of stars? ... Get instant access to subscriber content on Astronomy.com! ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ... Astronomy Magazine ...

Russian SHAREABLE DATA CENTER Institute of Solar-Terrestial Physics SB RAS . ... The algorithm and appropriate program for decametric radiosignal propagation conditions prediction for paths from 500 to 9000 km have been developed at ISTP SB on the basis of normal wave method (AltyntsevaB.I,Iliyin N.V., Kurkin V.I. and others //Decameters channel simulation on the base of normal wave method . ... Solar activity indices are chosen automatically from the prediction date from the database . ...

... We can help students grasp the significance of Hubble's extremely keen eye, and learn a bit about angles and math in the process, with the following in-class activity. ... Looking through binoculars or telescopes allows us to magnify a small section of the sky. To measure sizes or distances in that small section, astronomers divide a degree into 60 smaller pieces called arcminutes, and further subdivide minutes into 60 smaller sections called arcseconds. ... 30 feet = . ... 36 seconds . ...

... 6.02.2002 . ... Credit: A. Kashlinsky ( SSAI ) S. Odenwald ( Raytheon ), 2MASS , NSF , NASA Explanation: What cosmic wallpaper is on the sky? ... Recently, however, the background in near infrared light was imaged at high resolution by the 2MASS telescope , and confirmed earlier estimates that it is over twice as bright as originally expected. ... Visible is light emitted from the very first stars and galaxies in the universe , emitted when the universe was less than half its current age. ...

... The procedure of radiometer signal integration can be considered as a sort of reducing dimension of the initial sampling space, where the samples are the result of analog-to-digital conversion. ... The probability distribution of the signal and spikes is completely known. ... The quality of the considered algorithm could be also illustrated by Figure 2 . ... One could see the considered adaptive algorithm is preferable even by low degree of compression, because all spikes have been depressed. ...

... FEATURES OF OBTAINED IMAGES All images obtained by the TESIS have a number of artifacts, i.e., the dark current, flat field, blurring (related to the feature of input shutters and CCD matrices of the equipment), and frame damage caused by the entry of cosmic particles. In addition, poor accuracy of the spacecraft stabilization leads to the fact that separately taken images of the Sun have a ran dom displacement and rotation relative to the CCD matrix. ... Methods of image recording of the TESIS. ...

... The Zenit-SM Launch Complex . ... INJECTION PROFILE . ... LAND LAUNCH . ... 1-st burn of Block DM-SLB (Injection into reference orbit) . 2-nd burn of Block DM-SLB (Injection into transfer orbit) . 3-rd burn of Block DM-SLB (Injection into target orbit) . ... TM-data reception in real time with US main engine second burn is provided by the mobile measurement station developed by RSC Energia, located in Abidjan, Kot-d'Vuar Republic. ... Official WEB-site of S.P.Korolev RSC Energia . ...

... Another significant contribution to the crystal energy of metals is the electron-ion interaction or the electron bandstructure energy (E BS ) which is defined by the interaction of valence electrons and the Brillouin zone (BZ) planes. ... The program BRIZ has been developed for 3D visualization of Brillouin zone configurations and intersections of BZ planes with a Fermi sphere[4]. ... 1.75 (electrons/atom). ... 4] Degtyareva V.F., Smirnova I.S.: BRIZ: a vizualization program for Brillouin zone ? ...

Microsymposium 38, MS080, 2003 (A4 format) PHYSICAL AND MINERALOGY CHARACTERISTICS OF THE LUNAR REGOLITH IN THE AREAS OF THE THERMAL ANOMALIES. ... Comparison of the local cumulative number of particles N per 104 m2 and photometric roughness parameter I. In this report we research data of the IR thermal radiation, the rough structure of the lunar regolith and mineralogy characteristics upper layer of the surface. ... The spatial graphical function of the lunar-surface thermal radiation. ... Figure 3. ...

Welcome to K -corrections calculator, simple service allowing one to determine K -corrections of a galaxy, given its redshift and one or more colours. ... K -correction in choose filter.. ... Redshift . Colour choose colour.. Colour value . Calculator . ... calculate spectral energy distributions , K-corrections calculator , GALEX FUV NUV , UKIDSS YJHK , K-corrections of galaxies , spectral based k-corrections , SDSS filter set K-corrections , K correction code IDL , kcorrect IDL C , . ...

... According to standard phase screen theory large values of the intensity indices correspond to focusing conditions. ... It has been found that focusing effects always occur in the multibeam reflection (glint interference) regime. ... Figure 1 . ... First of all, calculations show that multibeam regime arises under slightly larger values of (see the Table 1 ). ... Thus, in our case (reflection from the E layer, altitude about 100 km) focusing is quite possible already when multibeam regime arises. ...

... However, our studies show that Prosilica EC650 has very good p erformance to use as DIMM image detector. ... The sub-directories /opt/dimm/data/out for the output data file, /opt/dimm/data/log for the output log file yymmdd-dimm.log and /opt/dimm/etc for the configuration file must b e created. ... Pictures mode The Pictures mode provides grabbing of the star b ox images and storing their sequence as one output file "b oxrecord.fits" in /opt/dimm/data/images/ sub directory. ...

The nasa.gov site requires that JavaScripts be enabled in your browser. ... Contact NASA . ... The following are astronauts who are employed at NASA. Astronaut assignments and category definitions (e.g., "active" astronauts, "management" astronauts) are contained in a separate Flight Operations Directorate (FOD) policy letter. Astronaut . ... Acaba, Joseph M. 2004 . ... Aunon, Serena M. 2009 . ... Barratt, Michael R. 2000 . ... Burbank, Daniel C. 1996 . ... Cassada, Josh A. 2013 . ... 1998 . ...

Permitted Context: SELECT . ... The OPTION element can only occur within a SELECT element. ... When the form is submitted, the NAME of the enclosing SELECT element is paired with the OPTION's VALUE attribute to contribute a name/value pair for the selection. ... CLASS . ... The string to be used together with the name attribute of the enclosing select element, when submitting the form. ... SELECTED . ... This attribute is used within menus to define shaped hotzones associated with this option's value. ...