... Bad Astronomy . ... I think I will break from my usual format of Bad Astronomy/ Good Astronomy by saying that the way we define seasons currently is not strictly bad, but I feel (in my opinion!) that it could be better. The definition of when the seasons begin is at the moment of solstice or equinox; that is, winter (in the north) starts on December 22 nd and summer starts on June 22 nd . ... Now imagine breaking up the Sun's 46 degree up-and-down yearly swing into 1 day intervals. ...

... 24sep08: long recovery vs alfa rotation angle. ... On 23sep08 around 14:00 hours data was taken with alfa on the sky to see how long the recovery took. ... 2 172 MHz Bands per beam . ... On 24sep08 around 17:00 data was taken with alfa and the pdev spectrometer to measure the long recovery time versus the rotation angle of alfa. ... As alfa rotates, different beams have larger/smaller recovery times. ... This is the same data as the total power plots above. beam 0 alfa rotation= 0 deg . ... page up ...

... One of the more amusing ones is the mysterious ability to balance eggs on end at the Vernal Equinox (curiously, no such claims are made at the Autumnal Equinox). ... Every year, without fail, some TV station broadcasts a news segment showing local school children standing eggs on end on the first day of spring. ... If you can stand an egg on its end on the Spring Equinox, surely you can on the Autumnal Equinox as well! ... At any day of the year, grab a carton of eggs and try to stand each one. ...

... The Seasons . ... Section #1 Stargazers and Skywatchers described the observed motion of the Sun across the sky, in different seasons of the year. ... If the Earth's axis were perpendicular to the ecliptic, as in the drawings here, the Sun's position in the sky would be halfway between the celestial poles, and its daily path, seen from any point on Earth, would stay exactly the same, day after day. Each point on Earth would be carried around the axis AB once a day. ... The Sun and Seasons . ...

... On the equator (point C) the sun would always rise until it was overhead, while at the poles (A and B) it would always be on the horizon, going around the horizon once a day. ... Because everything is symmetric with respect to the line AB, the dark and light portions are always equal, and so are day and night, anywhere on Earth. ... Twice a year, the angle is as big as it can get, at the summer and winter solstices , when it reaches 23.5 degrees. ... That part of Earth enjoys summer . ...

... I fixed the bugs that caused the map_point changes to fail tests. Then I removed the no longer needed dimensional variables from the p structure and got those changes to pass all the tests. ... I put the code under subversion control in a new branch called refactor. ... The code change which processes each drizzle kernel over an entire image rather than a line at a time now passes the unit tests and was checked in. ... I got the keywords argument changes done and got the tests to pass. ...

This document describes changes that will affect users who migrate from XPA 1.0 to XPA 2.0. There have been a few changes that affect users who upgrade XPA from version 1.0 to version 2.0. ... For the SAOtng program, this means that you must explicitly specify the access point, i.e.,: cat foo.fits | xpaset SAOtng fits . ... xpaset SAOtng . By default, xpaset, xpaget, etc. now wait for the server callback to complete; i.e., the old -W is implied (and the switch is ignored). ...

GrIm II . ... The MC has been modified to change the way GRIM images are stored to disk when FITS format is selected. ... The solution the Grim team has come up with is to internally add a constant of 10000 to every pixel of the 'bias subtracted' grim image which makes it conform to the unsigned 16-bit number standard, in that all pixel values after this addition of 10000 are in the range 0-65535. ... We have now implemented this for storage of GRIM files in FITS format. ... filetype fits . ...

... 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. ...

... The changebar (represented by two hyphens in the image) appears in the 10px space to the left of the paragraph. The illustration shows a vertical line that represents the left edge of the paragraph's containing block. ... The change bars (two red hyphens) appear to the left of the word "THIS", which begins the fourth line of text. The following PRE element simulates the example. Vertical bars represent the left containing block edge. ... to the left of the line containing | ...

OptInt PmWiki : Pm Wiki / Changes From Pm Wiki 1 . This page is intended to describe features of PmWiki 1.0 that have been changed or eliminated in PmWiki 2.0. ... ThisGroup:SideBar&action=edit Edit menu]] . ... action=post no longer exists -- posting a new page is now performed by using ?action=edit with the post control set to a true value. ... PmWiki's ReadPage() function no longer supplies default text for non-existent pages -- this is now decided by whatever functions need the page. ...

. Food/crop/plant production is very sensitive to climate; many zones exist .

... The mouse pointer is represented on the screen by a small bitmap called the cursor . ... GdkWindow* gdk_window_get_pointer (GdkWindow* window , gint* x , gint* y , GdkModifierMask* state ); . ... It is possible to grab the pointer, which means that all pointer events will go to the grab window for the duration of the grab. ... gint gdk_pointer_grab (GdkWindow* window , gint owner_events , GdkWindow* confine_to , GdkCursor* cursor , guint32 time ); . void gdk_pointer_ungrab (guint32 time ); . ...

... XMM-Newton SOC Home Page Conferences & Meetings . ... Data Analysis SAS News What is SAS? How to use SAS SAS Workshops SAS Version Changes Download and Install SAS Science Simulator (SciSim) . ... EPIC cameras optical loading . ... The PI is invited to cross-check the expected X-ray flux from the target source (and from any other potentially bright source in the target field of view), or to provide the SOC with her/his own estimate, if not originally specified in the proposal. ...

... You are here: start €Ё lbaops €Ё lbafeb2009 €Ё vx014batlog . ... VLBI Schedule . ... Observer's Wiki . ... lbaops:lbafeb2009:vx014batlog . Recorded to ATNF V006B . Near the start CACAL was run continously: 3 cycles, phase only, 90^o included (i.e. circular), . ... 02:04 Source change gives very different phases. ... Comparing this data to that of V255D/E (which did not use continuous cacal) one sees that in this data set the sources are noiser, but all the antennae would have phased up fine. ...

Next: Imaging by an Optimizing Method . ... A big advantage of this numerical integrator is its stability: the error in the semi-major axis and the eccentricity depends only on the step size and does not grow with an increasing number of time steps. ... As the integration time increases, the numerical results become more contaminated by various errors. ... A new symplectic integrator produces no secular truncation errors in the actions of a Hamiltonian system. ...

... Subscriber Extras . ... Web Extras . ... Astronomy for Kids . ... Astronomy 101 . ... Astronomy Foundation . ... Web Extra: Gamma raysт?? long road toward Fermi . ... Watch a gamma ray travel from its source in a faraway galaxy, through the extragalactic background, and finally to Earth, where the Fermi telescope can measure it. ... The gamma rays have a very long journey between their blazars and Earth, where astronomers can measure them. ... Get instant access to subscriber content on Astronomy...

... An anelemma is that figure-8 curve that you get when you mark the position of the Sun at the same time each day throughout planet Earth's year. ... Today or tomorrow, depending on your time zone, the Sun reaches its northernmost point in planet Earth's sky marking a season change and the first solstice of the year 2004. ... Ida and Dactyl: Asteroid and Moon . ... This asteroid has a moon! ... Elliptical Galaxy M87 . ... Even for an elliptical galaxy, though, M87 is peculiar. ... Next [ Last page ] ....

... Return to the Kernel page . ... Kernel . ... This article is part of the LWN Porting Drivers to 2.6 series . One might be tempted to think that the basic task of keeping track of the time would not change that much from one kernel to the next. ... One change which shouldn't be problematic for most code is the change in the internal clock rate on the x86 architecture. In previous kernels, HZ was 100; in 2.6 it has been bumped up to 1000. ... Driver porting: Timekeeping changes . ...

... The Raw Images . Table 1: List of Viking Orbiter Images of the "Face on Mars" . ... Processing the Face Images . ... In July, 1976, Viking Orbiter 1 was acquiring images of the Cydonia region of Mars as part of the search for potential landing sites for Viking Lander 2. ... Using the height field, it is also possible to view the "Face" from different look directions, by mapping the Viking Orbiter image directly on the the topography and then placing the "viewer" at different locations. ... Mars . ...