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ASKAP Australia Telescope National Facility Antennas Control Systems ASKAP Antenna specification Operating parameters ASKAP ANTENNA SPECIFICATION ­ BASIC OVERVIEW The ASKAP antennas will be · Prime focus (single reflector ) antennas on an az-el mount/drive with a third (polarisation) axis to provide all-sk y coverage (illustrated in Figure 1a) · A The pointing accuracy of the antennas will be 30 arcsec (rms) or better in all operational modes. ...

... sin f = y / r . cos f = x / r . ... They are now viewed as new definitions of the sine and cosine, for the polar angle f given by x and y ( a slightly different way of formulating this definition is described further below ). ... sin 2 f + cos 2 f = 1 . ... Angle . ... Many trigonometry texts define the sine and cosine slightly differently, using the so-called unit circle . ... Then the distance AB ("the sine line") equals sin a , and the distance OA ("the cosine line") equals cos a . ...

... In polar coordinates, the point P is defined by its distance r from the origin O (see drawing) and by its polar angle ("azimuth" on a map) between the x-axis and the "radius" r = OA, measured counter-clockwise. ... When one or both are negative , the angle f is larger than 90 degrees, and such angles never appears in any right-angled triangle. ... There is a simple solution , though: use the above equations to re-define sin f and cos f for such larger angles! ... But it also works for larger angles....

... Up: Science Data Pipelines . ... We designed and developed a package which simulates extragalactic point source data within a given field of view and SIRTF band. ... The simulator is modular and extensible to enable multi-wavelength simulations, has been optimized by utilizing parallel processing capabilities, and will be used to test pipeline software. ... The extragalactic simulator is capable of generating large numbers of galaxies within a given patch of sky for SIRTF pipeline testing. ...

Table 1: Basic Information on the AO Site and the 305-m Telescope Site Longitude (Geodetic) 66 ф 45 0 11.1 00 W Latitude 18 ф 20 0 36.6 00 N Elevation of re ector center of curvature 497 m (1630 ft) above MSL Telescope Primary Re ector Diameter of Spherical cap 305 m (1000 ft) Radius of Curvature 265 m (870 ft) Illuminated Area (at zenith ): ... Suspended 137 m (450 ft) above the re ector is a 900-ton triangular platform, supported by 18 cables strung from 3 reinforced concrete towers. ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Many of the fields are spatially . ... These include a pulsating white dwarf which appears to have a hot companion, a number of stars with A-type spectra that vary on a period in the range 20 35 min. Our primary goal is the discovery of new AM CVn systems: we find 66 sources which appear to show periodic modulation on a time-scales less than 40 min and a colour consistent with the known AM CVn systems. ...

polimplot -- Plot a polarization vector map . ... inpol = "" [name] . Input linear polarization image (in %) to plot. inpopa = "" [name] . Input image for position angle of linear polarization vectors (degrees). poi_err = "" [boolean] . ... Name of corresponding polarization position angle error image (degrees). ... This task is a flexible tool for plotting a polarization vector map from two images of the polarization and the position angle of the polarization vector. ...

Next: A box, to include Up: To produce a region Previous: To produce a region . select cursor and circle . When in the image window, the mouse now has a box shape with an arrow at the upper left corner. The mouse buttons act as follows: . LEFT - to move the center of the circle at the position of the arrow point. ... RIGHT - idle. center the circle at the point source by positioning the arrow point and clicking on the LEFT mouse button. A circle will appear at the arrow position. ...

... 24 } Line { SrcBlock sin SrcPort 1 DstBlock func1 DstPort 1 } Line { SrcBlock Fcn SrcPort 1 Points [0, -55] DstBlock func DstPort 1 } Line { SrcBlock (G*M) ^1/2 SrcPort 1 Points [25, 0] DstBlock func DstPort 3 } Line { SrcBlock func SrcPort 1 Points [40, 0] Branch { ...

Stellarium 0.12.3 . ... Classes . ... gSatTEME Class Reference . Sat position and velocity predictions over TEME reference system. ... Set compute epoch for prediction. ... gVector љ . ... Get the TEME satellite position Vector. ... Get the Geographic satellite subpoint Vector calculated by the method compute SubPoint. ... gVector Satellite position vector meassured in Km. x: position[0] y: position[1] z: position[2] . ... gVector Satellite Velocity Vector measured in Km/s x: Vel[0] . ...

... The Sun rises higher in summer than in winter. ... Over the course of the year, the angle between the Sun and the zenith (straight up) varies by 47 degrees -- a fourth of the way across the sky. ... A solar incidence angle of 90 degrees means the Sun is on the horizon; an angle of 0 degrees means the Sun is directly overhead; negative angles, which occur only in the tropics, mean that shadows point toward the equator. ... Every day, the stars rise and set along arcs parallel to the celestial equator...

. Computer Ephemeris. Lunar equatorial positions. Explanations. Each row contains at 0 h and 12 h of Time Dynamical Terrestrial: month, day, apparent right ascension (hours, minutes, seconds), apparent declination (degrees, minutes, seconds of arc) and geocentric distance (in Earth's radii).

Astronotes Armagh Planetarium's Stellar Blog! ... Armagh Planetarium . ... Moon . ... Space Flight . ... Science Fiction . UFOs and Fringe Science . Monthly Sky Notes . ... NASA's Cassini spacecraft obtained this image of Saturn's moon Helene on June 18, 2011. Image credit: NASA/JPL-Caltech/Space Science Institute) . ... Your email address will not be published. ... Email * . ... Here you will find the latest news and views from the fascinating worlds of astronomy and space exploration. ...

... BOM2 and the basic block of solar limbograph including pointing and control systems ? ... Fine tracking platform (FTP) for Sun tracking by the sight axis of the limbograph; . ... Tracking system frequency ? ... Controller of the control system and solar fine tracking of the sight axis of the limbograph; . ... The basic relative construction of the elements and instrumental blocks of the "Astrometria" space experiment is shown on the block diagram of units within the complex of SL-200 solar...

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Here user should specify the origin of coordinate system (observer's position). In case of rectangular coordinates it can be center of any major planet or the Sun or any minor planet. ... For spherical coordinates the origin of coordinate system can coincide only with the center of the Earth or with any point on the Earth surface. ... a)by code of observatory in the list of observatories maintained by Minor Planet Center (see IX. Observatories ). b)by introducing name of observatory. ...

... A comparison of the computed and experimental relations F max ( H), as well as comparison of drift scans of point sources across different horizontal cross-sections of the BP with the corresponding computed cross-sections were made. ... The drift scans of the point source 3С84 (H=87 o ) at the wavelength 7.6 cm across the horizontal cross-sections of the BP (black lines) and the computed horizontal cross-sections of the BP corresponding to them (red lines). ...

... Ranger 7 was designed to achieve a lunar impact trajectory and to transmit high-resolution photographs of the lunar surface during the final minutes of flight. ... Velocity at impact was 2.62 km/sec (1.62 miles per second). ... The television system consisted of a six slow-scan vidicon TV cameras capable of transmitting high-resolution, close-up television pictures of the lunar surface during the final minutes of flight before the spacecraft impacted the lunar surface. ...

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