... Alfa_ang is a GUI for the rotang routine. The purpose of this routine is to calculate the optimum rotation angle for ALFA given the RA and Dec of a source and the date and time of the observation. The routine also returns the azimuth and zenith angle of the telescope at the requested time, thus it can be used to find the correct rotation angle and azimuth for the Fixed Azimuth Drift Scan observing mode used by the AGES drift precursor observation. ... To run alfa_ang at Arecibo: . ...

... Requests for Comments (RFCs) – это набор документов выпущенных Internet Engineering Task Force (IETF) из Network Information Center (NIC), которые представляют новые протоколы и устанавливаемые стандарты для стека протоколов Интернет Каждый такой документ определяет аспект относительно протокола Интернет. Ниже мы перечислили все RFC, которые имеют отношение к этой книге и различному программному обеспечению описанному в ней. ... User Datagram Protocol (UDP). ... Internet Protocol (IP). ...

After filling in and submitting this form it will be processed and sent to WDC-B data manager responsible for the data of your interest. You will receive requested data by conventional or electronic mail according to your preference. ... E-mail address: . Regular postal address: . ... Low Atmosphere . ... Radiation Belts of Earth . International Geomagnetic Referece Field Model (IGRF) . ... Press button below to submit your request to WDC-B data manager or reset your selections. ...

I was wondering what conditions should be met to have the "darkest" sky .. ... Upon the above publication of the Southern Galactic hemisphere, TunГ Tezel started seeking opportunities to create the Northern counterpart image. ... So, the initial quest of having the darkest possible sky have delivered us these two all-sky images of the two galactic hemispheres as seen from Planet Earth. Zoomable and 'full-screenable' fisheye view of the "darkest sky" Southern Galactic Hemisphere image. ...

The STScI Electronic Leave System is a standard, fast and easy way to request leave, notify others and learn when others are away. ... http://www-int.stsci.edu/leave/ . ... Display all requested leave for a division in list format . Display all requested leave for a division in calendar format . Edit your email leave distribution list If you haven't used this system before, you should start with the List and Calendar views to browse existing leave requests for your division. ...

... Stellar Evolution is driven entirely by the never ending battle between Pressure and Gravity . As imbalances are reached, the star is driven to find a new Energy source. ... Pressure and gravitational forces are equal, the star is stable and its core is sufficiently hot to fuse Hydrogen into Helium More about main sequence stars . ... The luminosity generated by the core fusion of Helium into Carbon is far greater than the shell luminosity associated with the fusion of Hydrogen into Helium. ...

... An overall criterion for standard-star selection is the accuracy needed in the final results: if you need more accuracy, you will need more standard stars. ... While it is possible to get a rough estimate of the extinction by observing different standard stars at high and low airmasses, the relatively large conformity errors in most photometric systems, together with the low accuracy of some standards, make this method very inefficient (see Young [ 10 ], p.178). ...

Last updated 5 November 2003 by JMD . Last link checked 9 October 2003 by JCB . Data from 191 observations of stars with the ARCES were analyzed to calculate exposure times to reach particular signal-to-noise values for bright standard stars. ... An exponential fit to the data shows pretty good agreement and allows for forecasting to fainter stars beyond the limit of the data set ( V ~ 12). The fit was used to calculate the exposure times in the table below: . ...

... SCHED STANDARD OBSERVING BANDS ---------------------------------------------- Center BAND Frequency(1) Bandwidth '90cm' 330.49 0.0 '50cm' 610.98 0.0 '21cm' 1465.49 128.0 '21cm' 1435.49 64.0 '21cm' 1416.49 0.0 '18cm' 1658.49 0.0 (2) '18cm' 1653.99 0.0 (3) '13cm' 2295.49 0.0 '6cm' 4990.49 0.0 '4cm' 8415.49 0.0 '2cm' 15285.49 0.0 '1cm' 22235.49 0.0 '24ghz' 23800.49 0.0 '7mm' 43135.49 0.0 'sx' 2295.49 and 8415.49 0.0 ---------------------------------------------- 1. ... Most 18 cm observing. ...