... 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) . ...

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• lascruces.html
• Untitled Document

... Sighting the telescope, first at the tree and then at pole B, you measure the angle A of the triangle ABC, equal to the difference between the numbers you have read from the azimuth plate.. ... Why triangles? ... One large surveying project of the 1800s was the " Great Trigonometric Survey " of British India. ... Everest was the one who commisioned and first used those giant theodolites; they are now on display in the Museum of the Survey of India in Dehra Dum. ... Everest . ...

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• The Sundial
• Seasons of the Year
• The Moon: The Distant View

... Sighting the telescope, first at the tree and then at pole B, you measure the angle A of the triangle ABC, equal to the difference between the numbers you have read from the azimuth plate.. ... Why triangles? ... One large surveying project of the 1800s was the " Great Trigonometric Survey " of British India. ... Everest was the one who commisioned and first used those giant theodolites; they are now on display in the Museum of the Survey of India in Dehra Dum. ... Everest . ...

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• Maps of the Heavens
• How distant is the Moon?
• Seasons of the Year

Next: Available Receivers Up: The Arecibo Observatory and Previous: The Arecibo Observatory and . The main reflector of the telescope is a , 305 m (1000 ft) in diameter and 51 m (167 ft) deep. ... The system housed in the Gregorian dome provides continuous frequency coverage from 300 MHz to 10 GHz using a pair of shaped (secondary and tertiary) subreflectors, plus standard point feeds and receivers. ... Consecutive use of multiple receivers during an observing run is straightforward. ...

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• rotaPlatToSky
• pntModelGradients
• ALFA Front End Optics

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. ...

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• The AstroStat Slog marked point
• ChaMPlane data_archive_.html
• The Markers Menu

... Fit the ring around the equator and then change its inclination from 0 degrees (equatorial orbit used by geosynchronous satellites) to 28.5 degrees (space shuttle orbit) to 51.6 degrees (space station orbit) to 90 degrees (polar orbit used by spy satellites). by Rob Landis, Space Telescope Science Institute . ... With so many satellites now in orbit, it is likely that you have seen an artificial satellite zipping across the night sky. ... http://www.amsat.org/amsat/ftpsoft.html . ...

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• ASP: To Every Season There is a Reason
• ASP: Using Multicultural Dimensions to Teach Astronomy
• ASP: Indiana Jones and the Astronomers of Yore

... The near-UV prism (NUVOP) transmits only above 1600 with a wavelength dispersion / around 100 at 2500 . ... The wavelengths determined from objective prism spectra using these dispersion curves should have a / error of <1% for f /96 spectra. ... 4000 . ... Overall, photometry of objective prism spectra should have errors of about 10% or less for wavelengths below 4000 for NUVOP spectra and below 2500 for FUVOP spectra, provided that the position of the undispersed target is known to within a pixel. ...

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• http://www.stsci.edu/spst/lrpg/documentation/procedures/lrpg_alphabetical_unix_tools.html
• http://www.stsci.edu/spst/lrpg/documentation/procedures/test.html
• Habitable Worlds Across Time and Space

... This year's eclipse is unique in duration. ... Although, at the present time, there are 6 solar observatories belonging to leading space agencies in orbit around the Earth, the eclipse of 22 July, 2009, will only be seen by two of them: the Russian CORONAS-PHOTON satellite equipped with TESIS telescopes and Japan's HINODE satellite fitted with an XRT space telescope. ... TESIS will be the first of the two devices (and the very first on Earth) to witness the solar eclipse. ...

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• Project's diary

... Mark C. Lee (Colonel, USAF, Ret.) NASA Astronaut (former) . ... EDUCATION: Graduated from Viroqua High School, Viroqua, Wisconsin, in 1970; received a bachelor of science degree in civil engineering from the U.S. Air Force Academy in 1974, and a master of science degree in mechanical engineering from Massachusetts Institute of Technology in 1980. ... NASA EXPERIENCE: Lee was selected as an astronaut candidate by NASA in May 1984. ... Lee retired from NASA and the Air Force effective July 1, 2001. ...

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• Astronaut Bio: Mark N. Brown

... Milky Way . ... Map of the Milky Way (based on data from NASA's Spitzer Space Telescope) showing its two major stellar arms and central bar. ... ТљIn written science fiction, one often encounters another navigational convention, where towards the Galactic Centre is described as т??Corewardт??, away from the Centre towards the rim of the Milky Way is т??Rimwardт??, objects in the direction of the Galaxyт??s rotation are т??Spinwardт??, while objects in the opposite direction are т??antispinwardт?? ...

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• Rings Around an Asteroid | Astronotes
• Space and Astronomy Gifts | Astronotes
• Karl Jansky Father of Radio Astronomy | Astronotes

Peremennye Zvezdy", . ... GSC 4232-02515, NSVS 3147658, NSVS 3174760 . ... 14.2-14.9 (R, NSVS); . ... During observations of a secondary eclipse of GSC 04232-02830 (Goranskij et al., 2005) on August 8, 2007, we identified GSC 4232-02515 as a W UMa eclipsing binary. ... VAST software was used for aperture photometry. ... This method produces a light curve with an arbitrary zero point. ... Light Curve . Light curve of GSC 4232-02515 in NSVS magnitude scale. ... gsc423202515_kadar_nsvs.dat . ...

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• The Flare and the Galaxy
• XWare > APOD

... By LORNA SIGGINS, The Irish Times, 31 December 2008: A тАЬLEAP secondтАЭ added to clocks around the world, the longest total solar eclipse of the 21st century, and a Galway university professor dressed as Galileo Galilei тАУ these are some of the highlights of the International Year of Astronomy which starts across the world tomorrow. ... An Post is due to issue two stamps to mark the year. ... International Year of Astronomy, Ireland National Node . ...

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• Knockmany Chambered Cairn
• Human Orrery
• Terry Mosely's Bulletins

The images shown above are based on tiling of the hyperbolic plane with equilateral triangles having angles not of 60 o but rather 360/7 degrees, so 7 such triangles fit around a point. The image on the left shows the triangles and circles drawn from the vertices that each touch 7 other points. On the right, the pattern formed by these circles has been filled with blue and gold. ... This filled image is shown at larger scale below: . ... Tutorial : Part 1 | Part 2 | ...

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• Rulers
• Values, Variables, and Literals
• The Mouse Pointer

... Bad Astronomy . ... Bad Astronomy: The North Star, Polaris, is a very bright star. Good Astronomy: Polaris is a middling-bright star, easily missed. ... He said it was close to Polaris, the North Star, but he also said it was in the East. ... It's natural, I suppose, to think that such an important star should be bright, but really, that's a conceit, like thinking that the Earth is at the center of the Universe. If more people knew just why Polaris is the North Star, this Bad Idea would stop. ...

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• Phil Plait's Bad Astronomy: Bad News
• Phil Plait's Bad Astronomy: Bitesize Astronomy
• Phil Plait's Bad Astronomy: Bad TV

... There are number of features that can be set by the user in the Sparkle Dialog box. ... The Sparkle plug-in computes the luminosity (level of whiteness) of each pixel in the image (the user can see this when the progress window labeled Generating luminosity array... is displayed). ... The threshold value is currently a slider/text field pair which have a precision of .0001. ... Like the Threshold value, the Flare Intensity has both a slider and a text input field for specifying its value. ...

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• APOD: 2015 September 2 - The Flare and the Galaxy
• Sternberg Astronomical Institute
• Frozen Text Tutorial

Next: Calling Parameters Up: CAL_getRFCdefocus Previous: CAL_getRFCdefocus Contents . ... The angle of incidence on the facets of the gratings . where is the blaze angle, which is available from CCF MiscData , item BLAZE_ANGLE , and is the angle of incidence measured from the grating surface for an on axis source. is available from CCF MiscData , item INCIDENCE_ANGLE , or from CCF Lincoord , item G_ALPHA . ... with the radius of the Rowland circle available from CCF MiscData item ROWLAND . ...

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• xmmtrack: XMM orbit TRACKing
• Extraction of a X-ray light curve for an EPIC point-like source (GUI version)

Name: GRMARK Purpose: mark points with specified symbol Category: GRAPHICS File: pgplot.src Author: T.J. Pearson Use: see description below. Description: SUBROUTINE GRMARK (IDENT,CENTER,SYMBOL,ABSXY,POINTS,X,Y) GRPCKG: mark a sequence of points with a specified symbol. ... Arguments: IDENT (integer, input): plot identifier from GROPEN. ... X,Y (real arrays, dimension at least POINTS, input): the coordinate pairs; if POINTS=1, these may be scalars instead of arrays. ...

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• http://www.atnf.csiro.au/computing/software/gipsy/tsk/scanaid.dc1
• kpvslice: interactive position-velocity slicing
• GRAPHICS general subroutines

... fran†зais . Deutsch . ... Bringing news from across the Universe to children all around the world . ... But did you know that half these points of light is not one star, but two or more circling around each other! ... Usually, sibling stars are quite far apart taking months, years or even centuries to circle around each other. ... Before long these stars will face a catastrophic end in one of two possible ways: as violent supernovae explosions or as an even more energetic gamma ray burst . ...

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• POLIMPLOT (V2.00) --- November00 --- POLIMPLOT (V2.00)
• FORS Sec Std and Abs Phot Project
• Comet Halley

EXCERPT from BIENNIAL REVIEW REPORT 1997­1998 Agris J. Kalnajs June 17, 1999 1 1 Research conducted and proposed 1.1 Star Streaming The Hipparcos data was released in 1997. The top panel of Figure 1 shows a plot of the tangential velocity components along the Galactic plane in the direction pointed to by the Galactic longitude l. These stars, with distance errors less than 10%, are within 100 parsecs of the Sun and have a B - V < 0.8 . ... Such streaming will occur naturally in a barred galaxy. ...

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• C/2006 P1 (McNaught)
• The High-Z SN Search Description
• The Spinning Sun

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. ...

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