... Abstract Find nearest point on a triaxial ellipsoid to a specified line, and the distance from the ellipsoid to the line. ... If linept is inside the ellipsoid, pnear will not necessarily be the closest point of intersection. dist is the distance of the line from the ellipsoid. ... If the line intersects the ellipsoid, dist is zero. ... Examples 1) We can find the distance between an instrument optic axis ray and the surface of a body modelled as a tri-axial ellipsoid using this routine. ...

... RIVER FORECAST LATEST FLOOD FORECAST AND REMARKS POINT READING STAGE GREEN NEAR 63.4 FT 64.0 FT CRESTING NEAR 65.0 FT AROUND AUBURN 300 PM MIDNIGHT TONIGHT.. ... SATSOP NEAR 33.5 FT 34.0 FT CRESTING NEAR FLOOD STAGE SATSOP 300 PM AROUND 5 PM THIS AFTERNOON NISQUALLY NEAR 12.1 FT 10.0 FT CRESTING NEAR 12.5 FT AROUND NATIONAL 230 PM 6 PM THIS EVENING. ... NEW RECORD FORECAST** *RECORD 21.57 FT ON 12/23/33 NACHES NEAR 18.5 FT 17.0 FT CRESTING NEAR 22.0 FT AROUND NACHES NOON 10 PM THIS EVENING. ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Risks Comparable to NEOs . ... The Increasing Rate of Discovery of Asteroids . ... Comet and Asteroid Collision Probabilities . ... Extreme albedo comets and the impact hazard (PDF Format) . ... Asteroid Impact Animations . ... Workshop on Scientific Requirements for Mitigation of Hazardous Comets and Asteroids - 2002 . ... The Spaceguard Survey Report, 1992 (PDF) . Tsunami from Asteroid/Comet Impacts . ...

... Research . ... The major problem in HVC research is the unknown distance towards most of the HVCs. ... Thilker et al. (2004) used the Green Bank Telescope (GBT) to map an area of $7^{\circ} \times 7^{\circ}$ around M31 in H i . They discovered a population of HVCs located within a projected distance of about $50~\mathrm{kpc}$ from M31. ... 2004). ... The remaining HVCs around M31 are isolated in position and velocity and may represent primordial, dark-matter-dominated clouds. ...

... Tonight's Sky . ... The Magazine . ... Observing . ... 50 Weirdest Objects . ... Supernova showered Earth with radioactive debris . ... Gravitational wave search provides insights into galaxy evolution and mergers . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Observing springtime deep-sky objects with a large telescope . ... near earth objects . ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ...

The Sun is our nearest star and the source of energy for life on Earth. ... For centuries astronomers wondered whether they were clouds floating in the Sun's atmosphere, but we now know that they really are huge regions of magnetic field, about as intense as the field at the poles of an iron magnet. ... Such abrupt events were named solar flares , and what made them especially interesting was that occasionally, after a prominent flare, a magnetic storm would erupt on Earth. ...

... What's New? Bad Astronomy . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... On August 27, 2003, at 9:51 Universal (Greenwich) Time, Mars will be making its closest approach to Earth for quite some time. ... A lot of astronomers and news media are saying about how close it will be and how big it will look, but they are leaving out two crucial facts: Mars will be nearly 56 million kilometers away, and it's only fractionally closer than the last favorable pass. ...

Blackholes2 Forum Message . Forums: . ... Black Holes Easy Reader. ... To have a Black Hole first you must decide that gravity always is the same no matter how strong it gets. ... So Black Holes may have different sizes. ... Black Holes are a very emotional idea for many of the people who think they are smart and right messages here. ... www.astronomy.net . ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

Nothing in life is perfect, and after four months many readers have been kind enough to point out a number of typos and errors. These are available in either gzipped postscript or pdf format. Many thanks to the following for their careful reading of the book: . ... Greg Grunberg . ... Anthony Garratt . Alison Brennan . Manuel Berondo . ... Further thanks to Greg and Anthony for their suggestions of improvements to the text. ...

Astronotes Armagh Planetarium's Stellar Blog! ... Solar System . Sun . ... Space Flight . ... Posted on March 16, 2015 | No Comments As everyone knows on Friday 20 March 2015, a total solar eclipse will occur across the far northern regions of Europe and the Arctic. ... Continue Reading.. ... 8 Comments The ancient Chinese thought they were stars inside a solar orb. ... Here you will find the latest news and views from the fascinating worlds of astronomy and space exploration. ...

... omdetect (omdetect-5.14.2) [?? Meta Index / Home Page / Source Flagging Algorithms Since the object producing a read-out streak may lie outside the image, another algorithm is also used by omdetect. ... nMin = int( 0.6 (ny + 1)) where ny is the number of rows in the image (image height) . ... Loop through all the columns of the image . ... n4 = count(image(i0, :) image(i0 + 1, :) ) Count the number of pixels along column i0 that have a greater value than their neighbour in column i0 + 1 . ...

... Once "point" is read, assumes all the following x,y coordinates are points. ... Program asc2dxf c reads set of x,y coordinates and writes a .dxf file for aperture plate. character*4 xop1,xop2 character*12 outfile 1 format ( 1h0 /7hSECTION/1h2/8hENTITIES/ 1h0 ) 2 format (6hCIRCLE/1h8/1h1/2h62/1h3) 3 format (4hLINE/1h8/1h1/2h62/1h3) 4 format (5hPOINT/1h8/1h1/2h62/1h3) 5 format (2h10/5h43.00/2h20/5h43.00/2h30/5h0.000/2h40/5h43.00/ 1h0 ) 6 format (2h10,/,f6.3,/,2h20,/,f6.3,/,2h30/5h0.000) 7 ...

nearneighbor - A Nearest neighbor gridding algorithm nearneighbor [ xyzfile ( s ) ] -G out _ grdfile -I x _ inc [ m|c ][/ y _ inc [ m|c ]] -N sectors -R west / east / south / north [ r ] -S search _ radius [ m|c|k|K ] [ -E empty ] [ -F ] [ -H [ nrec ] ] [ -L flag ] [ -V ] [ -W ] [ -: ] [ -bi [ s ][ n ] ] nearneighbor reads arbitrarily located (x,y,z[,w]) triples [quadruplets] from standard ... Default is quadrant search, i.e., sectors = 4]. ... H Input file(s) has Header record(s). ...

... The Plug-in Guide is your introduction to using Netscape's Plug-in Application Programming Interface (API) to develop plug-ins for Communicator 4.0. ... If you decide to use Netscape's LiveConnect to allow your plug-in to communicate with Java and JavaScript, your next step after reading this guide is LiveConnecting Plug-ins with Java . ... The Plug-in Software Development Kit . ... The Plug-in Guide is designed for the C or C++ developer who wants to extend the capabilities of Netscape Communicator...

The database contains references to the papers, data files and links to the Internet resources related to measurements and calculations of the optical constants in the wavelength interval from X-rays to radio domain. ... References to some useful books and reviews on the subject (e.g. the classical handbooks edited by E.D.Palik) and links to Internet collections of optical constants and personal WWW pages with related software were also placed in the database. You have arrived at our welcome page. ...

... Current APO Weather . ... Search Site . ... Information for New Users . ... Technical Staff pages . Night Logs and Mailing Lists (maintained by APO) . ... Technical Documents and Database Search . ... Observer's Documentation and Procedures . ... Problem Reporting and APO Technical Documents Database Search . ... APO Drawing/Document Management Procedures . ... APO Technical Documents Database Search . Home Astrophysical Research Consortium . ... Mail Lists (maintained by APO) . ...

... The J, H and K bands are characterized by a bright background, such a background is mainly due to the emission of atmospheric lines and of thermal radiation. ... If the source cover a large fraction of the slit, spectra off-source must be observed to adequately sample the sky background. ... The on chip integration time (time spent in each position of the slit) must not exceed 40 seconds in J and H bands and 60 seconds in K band. ... We suggest a sequence of 10 for each elementary integration time. ...

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. ...

To read standard input into a shell script use the read command. For example: echo "Please enter your name:" read name echo "Welcome to Edinburgh $name" . This prompts the user for input, assigns this to the variable name and then displays the value of this variable to standard output . ... For example: echo "Please enter your surname\n" echo "followed by your first name: \c" read name1 name2 echo "Welcome to Glasgow $name2 $name1" . ...

... In the first implementation of optional raw data output in CONSTRICTOR, NPOI raw data of a scan was written into a single HDS formatted file. ... Sub-scan files can still be read individually, but the standard procedure is to read and concatenate at least the time stamps and delay line metrology data from all sub-scans, and then to read the fringe data individually. get_rawdata ,[ file_spec _char ] Procedure to read raw time and delay data from one or more sub-scan files specified by file_spec . ...