... The Figure shows the parallactic angle in relation to the source position at (RA,DEC), the zenith of the telescope at (LST,AoLatitude), the hour Angle HA, and the azimuth direction AZ (in the picture the source has already transitted). ... Now suppose that a second feed was placed 1 beam width away from the central horn parallel to the azimuth arm. ... Figure 1. shows the parallactic angle rate versus azimuth angle for declinations 8 through 28 (spaced 1 degree steps from Arecibo's latitude). ...

... for Cosmic Ray Observation is situated in Irkutsk (Russia). ... Real-time (preliminary) cosmic ray data in Irkutsk . ... Online Cosmic Ray and Atmospheric Pressure Data Base . ... Real-time data Uncorrected for pressure (Resolution 1 hour - 1 year) -- since 05.2001 . Real-time data Corrected for pressure (Resolution 1 min - 1 year) --- since 09.2001 . Resolution 1 hour - 1 year) --- since 06.2001 . Final data Corrected for pressure (Resolution 1 hour - 1 year) --- From 01.1975 To 07.2004 . ...

... Perl . ... IDL is used for data analysis and graphics. ... Advantages of a language that is popular in the real world are the existence of web resources such as tutorials, a wide range of libraries of existing code you can use and modify, and better job prospects for you if you ever want to venture into the real world. ... Most data reduction systems (eg IRAF, MIDAS, Starlink) do not interface well with any programming language: IRAF has itуs own (very clunky) language in which you can write scripts...

... We find a worst case upper limit for / of 8 10 -6 for z 5 and / of 0.9 10 -6 for z 1.6. The derived limits are at variance with the recent findings by Webb et al. (1998), who claim an observed variation of / = -2.6 0.4 10 -5 at 1<z<1.6. ... Appeared in: The Astrophysical Journal, 507:L13-L15, 1998 . ... 1 ) Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA . ... 3 ) On assignment from the Space Science Dept. of the European Space Agency . ... huizinga@stsci.edu . ...

... 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. ...

... Driving to the Sun . ... Credit Copyright: EIT Consortium , SOHO project , ESA , NASA Explanation: How long would it take to drive to the Sun? Brittany, age 7, and D.J., age 12, ponder this question over dinner one evening. ... Let's see ... the Sun is 93 million miles away . So, if we drove 93 miles per hour the trip would only take us 1 million hours." ... One hundred years would be 876,000 hours, still a little short of the 1 million hour drive time -- so the Sun is really quite far away. ...

traxy -- Transform an X,Y position from input to output pixel position using the same conventions as drizzle traxy xin yin . xin = 400 [real] . ... The X dimension of the input image (this is used to determine the centre which is the origin of the transformations). (nyin = 800) [real] . ... So, if an object on an input image at a certain position is drizzled with a given set of parameters then the position of that object on the output can be predicted using traxy with the same parameter values. ...

Next: Combining Flat Fields Up: Preparing Your Calibration Previous: Combining Bias Frames . Similarly to the bias combination one can obtain an average dark current frame. However, one should consider whether the dark correction should really be applied: one needs a reasonable number of dark frames in order not to degrade the S/N, and obviously this takes telescope time. ... In that case, provided a good linearity of the CCD, one could do with the subtraction of an average dark frame. ...

Hide Zen home . ... Index . ... Do we really need them for database indexing ? ... We need simple numbering scheme, so that for any given point we could easily calculate the number of "pixel", this is what HealPix provides and lacks HTM. ... During Rtree queries the number of index blocks read is several times greater than during Q3C queries. ... But in Q3C scheme, as we showed before, the circle is segmented, so we extract from the database only a few percents more data than occur in the circle. ...

... Direct data transmission rate (Mbps) . ... the density of electron fluexs with energies in four bands from 0.04 MeV to 1.7 MeV; . ... sensor (TV, IR) data and heliogeophisical information (HGI) transmission to data receiving and processing centers at a rate of up to 2.56 Mbps; . ... 1.76 GHz - TV- and heliogeophysical information and DCLI's data transmission to data receiving and processing centers; . 7.5 GHz - TV- and heliogeophisical data transmission to data receiving and processing centers; . ...

... Tonight's Sky . ... Sky this Month . ... The Sky This Week: April 1 - 10 . ... Astronomy for Kids . ... The Real Reality Show: Would aliens be anything like us? ... The Real Reality Show: All about the Drake Equation . ... The Real Reality Show . ... The Real Reality Show: Is Interstellar Travel Really Possible? ... Only registered members of Astronomy.com are allowed to comment on this article. ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email...

Appendix B. The SPIcam routine, m2test . ... modified from dofocus. macro m2test . ... echo "USAGE: m2test <start> <initial focus step> <number of exp. pairs>" . break . end . if ($EXPTIME > 30) . echo "exposure time is $EXPTIME" . ... echo "too short to be reliable" . ... focus = $1 . ... npairs = $3 . findex = 0 . ... focus = $focus - $findex * $step . echo doing focus = $focus (exp. ... focus $focus . findex = $findex + 1 . ... comment "m2test $1 $step $npairs" . ...

... Phase Diversity Imaging: Real Time Correction of the Atmosphere and Telescope . Dr. Robert A. Gonsalves . ... Join us this month for what promises to be an engaging talk by Dr. Robert A. Gonsalves, “Phase Diversity Imaging: Real Time Correction of the Atmosphere and Telescope.” Phase diversity imaging uses multiple images of an object to combat the deleterious effect of the changes in the atmosphere and telescope. ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

... Maxim was one of the leading analysts of Russia space activities, those who set the basis for the open independent analysis of then-Soviet space program. q In the early 1990s the small blue paperback book became a real breakthrough. In the time being, almost everything is allowed; in that time, even the title of the book - The Military . ... I believe that to open Maxim's files and archives for the experts and Russian space program enthusiasts would be a best thing we can do in memoriam. ...

... 2014 Irkutsk-Listvyanka, Russia G r o u p language English Theoretical round General note. ... Footstep of babr. Babr is a local representative of the biological family of cats (felidae) depicted on the coat of arms of Irkutsk, and the emblem of the X APAO (with a telescope in his mouth). ... Orion's Belt. The Babr decided to join company of astronomy animals-observers and came to Listvyanka to the X APAO to take photos of stars of Orion's Belt near the horizon. ... ISS in Zenith. ...

... HELD BETWEEN THE FIRST VISITING CREW (VC-1) AND JOURNALISTS . ... question to Tito): . You stated that you intend to go into business in space tourism. ... D. Tito: . ... Question to Tito): . ... Question to the combined crew): . ... As to any new cosmonaut we should explain certain things which a person cannot feel on the ground. ... All crew members treat me well and do everything so that I feel well aboard the International Space Station. ... Official WEB-site of S.P.Korolev RSC Energia . ...

Russian SHAREABLE DATA CENTER Institute of Solar-Terrestial Physics SB RAS . ... The real-time radiosignals characteristics calculation algorithm from current VS data is carried out according to the following scheme (V.P.Grozov ,G.V.Kotovitch,V.E.Nosov,S.N.Ponomartvhuk, S.V.Pushkarev,L.P.Sergeeva,V.V.Khakhinov. Real time decameters radio systems characteristics calculation by ionosphere vertical sounding data. ... ionogram and calculation results display on monitor; . ...

Christmas Day is celebrated on December 25. Many people look on Christmas as the time to celebrate the birth of Jesus Christ, but really the tradition goes back to the earliest of times.In those days the sun meant so much to primitive man that when it began to go lower each day till December 23, people thought the sun was going to die out and they were worried. ... On December 23 the sun stayed in the sky longer and longer and after that the nights were becoming shorter and shorter. ...

Real-time Cosmic Ray Variations st. Moscow (IZMIRAN) - http://helios.izmiran.troitsk.ru/cosray/main.htm . ... APATITY Neutron Monitor - real time! - http://pgi.kolasc.net.ru/CosmicRay/ . ... 5 min.Data of YAKUTSK neutron monitors - http://www.ysn.ru/ipm/neutron_ykt.htm . 5 min.Data of TIXIE neutron monitors - http://www.ysn.ru/ipm/neutron_tix.htm . ... Cosmic Ray Station ROME - http://www.ifsi.fra.cnr.it/cosmicray/index.html . LOMNICKY STIT real time data- http://neutronmonitor.ta3.sk . ...

RTT150 . ... This search system is designed for generating the necessary information on series of pointings (observations of each source consist of sets of exposures with different filters and sometimes with different exposure times) for observed sources. Search results appear at the separate page as a table with the following data: . DATE - real (not evening!) observations date (in YYYY-MM-DD format); . ... Bin - minimal CCD binning mode (may vary during the observations); . ...