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Astronomy Picture of the Day . Bright Points on the Quiet Sun . ... Explanation: Up close, the solar surface is a striking patch work of granules in this very high resolution picture of the quiet Sun . Caused by convection, the granules are hot, rising columns of plasma edged by dark lanes of cooler, descending plasma. ... Constantly present on the solar surface, the bright points do not seem to be related to sunspots that come and go with the magnetic solar cycle . ... Hole in the Sun . ...

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Government Open Systems Interconnection Profile Users' Guide, Version 2 . ... Computer Systems Laboratory . ... USA Government Printing Office, Washington, 1991 . ... 1.2 Nature and Purpose of Guide 1 . 1.3 Brief History of OSI 2 . 1.4 Role of GOSIP 5 . ... 5.3 Configuring a GOSIP System 29 . ... 6.5.5 Network Technology Options 43 . ... 7.7.2 Secure Data Network System (SDNS) 70 . ... 9.5 Interoperability with Non-GOSIP OSI Systems 94 . ... APPENDIX D: USERS' GUIDE EVALUATION FORM 155 . ...

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. All orders (not including Standing Orders and resale orders) placed online or by fax/mail, pay AstroShop shipping fees. International orders must be placed by fax/mail. Please visit the AstroShop for contact information, shipping prices and estimated delivery time. Standing Orders and Resellers: please contact service {at} astrosociety.org for new shipping prices for IAU Volumes. 390 Ashton Avenue, San Francisco, CA 94112 . T 415.337.1100 F 415.337.5205

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... 2010 April 16 . Bright Points on the Quiet Sun . ... Explanation: Up close, the solar surface is a striking patch work of granules in this very high resolution picture of the quiet Sun . ... Constantly present on the solar surface, the bright points do not seem to be related to sunspots that come and go with the magnetic solar cycle . ... About APOD | ... NASA Official: Phillip Newman Specific rights apply . NASA Web Privacy Policy and Important Notices . A service of: ASD at NASA / GSFC . ...

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... AstroAsciiData is a Python module to handle ASCII tables. ... The idea to develop this Python module emerged from the fact that ASCII tables continue to be one of the most popular and widely used data exchange formats in astronomy and probably science in general. ... To load this ASCII table, go into Python, load the AstroAsciiData module and read in the table with: . ... demo = asciidata.open('webexa.txt') . ... Users who only want to work with ASCII tables neeed no further python modules. ...

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For solar wind dials without any explanatory text, see this page . ... There are three logs, one for each condition index ( K P , Solar Wind ,and NOAA/SEC .) ... More about the solar wind's recent behavior can be found on my Current Solar Wind Conditions page. ... Other items of interest include NOAA/SEC Current Conditions , my composite current Auroral Images page, Windows on the Universe: Space Weather , and Public Outreach Index, Department of Space Physics and Astronomy, Rice University . ...

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Stellarium 0.12.3 . ... Classes . ... SphericalPoint Class Reference . Special SphericalRegion for a point on the sphere. ... SphericalPoint (const Vec3d &an) . virtual SphericalRegionType   . ... Return the area of the region in steradians. ... virtual bool  . ... contains (const SphericalPoint &r) const . ... virtual SphericalRegionP   . ... updateFillVertexBuffer (class StelRenderer *renderer, const DrawParams &params, bool handleDiscontinuity) . ... virtual bool SphericalPoint::isEmpty . ...

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Next: When the clock is Up: Keeping Time Previous: The hardware and software . In the Debian system, the system time zone is determined by the symbolic link /etc/localtime   . ... If it is unset, the system time zone is assumed. ... The date   command shows the current date and time. ... date   is also used to set the kernel's software clock: # date 07142157 . ... While each user can have his own time zone, the clock is the same for everyone. date   only shows or sets the software clock. ...

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... Iowa Robotic Telescope | ... Talon is based on OCAAS, a software suite developed by software engineer Elwood Downey ( Clear Sky Institute ) for use at the University of Iowa ?s first remote facility (the ATF, or Automated Telescope Facility). ... XObservatory : Telescope Control Interface . ... This program calls upon and coordinates much of the interrelated portions of the Talon architecture, and forms the primary control panel for the telescope, dome, and peripheral systems when used locally. ...

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... 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. ...

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SINGULAR POINTS IN THE SOLAR CHROMOSPHERE . ... In the structure of the solar chromosphere, containing information on the configuration of the magnetic field, we have found and identified all the main types of the singular points ( see Fig. 1 ), which are known as inherent features of the 2-D vector field. ... The main types of the singular points are the node, the focus, the center, and the saddle. ... Singular point of the focus type in the solar chromosphere. ...

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In this method the fields outside and inside a particle are represented by expansions in term of proper basis functions (practically always the vector spherical harmonics). Since the particle surface does not coincide with the coordinate surface, it is impossible to satisfy the boundary conditions exactly, and the expansions are limited by a finite number of terms, and the boundary conditions are considered in a finite set of points (matching points). ...

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Institute of Applied Astronomy Russian Academy of Sciences Method of Determining the Orbits of the Small Bodies in the Solar System Based on an Exhaustive Search of Orbital Planes Dmitrii Vavilov, Yurii Medvedev Introduction to the problem: Let we have n 3 positional observations of a body: points in time ( = 1, ) , right ascensions , and declinations . ... Determination of the orbit using the Gauss method of determining orbital elements based on two heliocentric positions and points in time. ...

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... For the past years I have been working on the problem of synthesis of light curves of close binary systems, consisting of a normal star and a compact object (point object with fixed X-ray luminosity). ... Possible existence of a bright spot on the disk's lateral surface is taken into account. ... The last of then will be published in Gordon and Breach Publishers ( Cherepashchuk A.M., Katysheva N.A., Khruzina T.S., Shugarov S.Yu. ... Cherepashchuk A.M., Katysheva N.A., Khruzina T.S., Shugarov S.Yu. ...

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... COMPUTER SIMULATION OF RADIOWAVE MULTIPLE SCATTERING EFFECTS IN IONOSPHERE USING MONTE-CARLO METHOD . ... Distribution of reflected radiation on the ground is computed. ... Such influence can be remarkable if the scattering is multiple, i.e. the optical thickness for the scattering process is considerably greater than a unit. ... Radiation energy transfer in the slab is modeled by distribution of some particles carring small portions of radiation energy. ... The isotropic plasma approximation is...

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