The cal values are normally measured using the sky/absorber technique . The data taking setup is normally 25Mhz*4 bands of 256 lags each. Do 3 seconds calOn followed by 3 seconds calOff. Then step the band by 100 Mhz until the entire receiver band is done. ... This cal value uses the Y factor so call it calK_Y. It is also possible to measure the cals using just the absorber or just the sky if you know the receiver temperature (and you assume the reflection coef in the receiver is small). ...

... ATNF Home . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Next: Third: Create a session Up: Starting up correlator control Previous: First: Log on to б  Contents . Both the correlator interface and the correlator spectra display program are run from lbaccc . ... lbaccc . ... A more complete explanation of SPD, including available commands, is found in Appendix C. Next: Third: Create a session Up: Starting up correlator control Previous: First: Log on to б  Contents . ...

Computer Ephemeris. Second order reduction quantities. Explanations. This page consist of four little tables. First and second tables contains J a (in 0.000001 s ) and J d (0.0001") for nothern declination, third and fourth contains the same information but for southern declination. Each table have 13 informational columns headed with right ascension values, and some amount of rows, labelled with date. ...

... The acquisition of an object for an FGS operating in TRANSFER mode is carried out in the same sequence described above, with the exception that the FGS remains in CoarseTrack until a specified spacecraft time. ... In a TRANSFER mode observation the DF 224 computer steps the FGS's IFOV across the photocenter (determined by CoarseTrack) along a diagonal path in detector space for a distance specified in the original proposal. Each sweep across the target is referred to as a scan. ...

... We then updated to PVCam 2.7.4.2, but we still see corrupt images if we don't close and reopen the camera after every exposure sequence, and the camera sometimes fails to respond to a trigger pulse. ... Close and re-init the camera, as follows: ... pl_cam_close(0) pl_pvcam_uninit() pl_pvcam_init() . ... power off camera . ... Call pl_exp_start_cont (to start a continuous exposure sequence into a circular buffer) with a circular buffer that holds too many images and you will hang your computer. ...

U.S. NAVAL OBSERVATORY WASHINGTON, D.C. 20392-5420 July 23, 1998 No. 64 TIME SERVICE ANNOUNCEMENT SERIES 14 UTC TIME STEP 1. The International Earth Rotation Service (IERS) has announced the introduction of a time step to occur at the end of December, 1998. ... Coordinated Universal Time (UTC) will be retarded by 1.0s so that the sequence of dates of the UTC markers will be: 1998 December 31 23h 59m 59s 1998 December 31 23h 59m 60s 1999 January 01 0h 0m 0s 3. ... Time Service Dept., ...

All stars derive their energy through the thermonuclear fusion of light elements in to heavy elements. High temperatures are required so that the mutual electrostatic repulsion of the protons in each fusing atomic nucleus is overcome. ... Elements with more protons in their nuclei require higher temperatures. ... This sequence is now shown in the animation below. ... First Step of the Proton-Proton Chain Narration . Second Step of the Proton-Proton Chain Narration . ...

Next: The Quasi--Newton Method. Up: Outline of the Previous: The Newton--Raphson Method. ... At each iteration, one computes . ... Neglecting the second derivatives matrix , we obtain the ``normal equations'' and the Gauss--Newton direction . This so--called Gauss--Newton method is intended for problems where is small. ... The algorithm implemented here is a modification of that Gauss--Newton method, that allows convergence even for rank deficient Jacobians or for large residuals. ...

NCR 53CF94, 53CF96 FLYER INFORMATION The NCR 53CF94 and 53CF96 Fast SCSI Controllers are high-performance CMOS devices conforming to ANSI standards X3.131-1986 (SCSI-1) and X3.131-199X (SCSI-2) for the Small Computer Systems Interface (SCSI). ... The NCR 53CF94 and 53CF96 feature 10 megabytes per second (MB/s) Fast SCSI-2 data transfers, improved single-ended SCSI operation, a 24-bit transfer counter, and enhanced SCSI-2 command functionality. ...

... Meade Instruments Corporation . ... Autostar Computer Controllers . 497 Autostar . ... One of the most important advances in telescope control in the past 25 years, the Meade #497 Autostar Computer Controller turns the ETX into an automatic celestial object locating system. ... The #497 Autostar Computer Controller plugs into the control panel of ETX-90EC, ETX-105EC, and ETX-125EC telescopes and enables automatic location of more than 30,000 celestial objects. ... about meade | ... Meade 4M | ...

... It is precisely these values that are displayed as O – C. In case computed positions of minor planet for all or some part of moments are found without accounting for perturbations, the corresponding moments are followed by asterisk (without perturbations are computed positions for all minor planets if moments of their observations lie outside the basic interval of 16 months or for ordinary ... The coordinate system and type of computed positions are indicated in status bar. ...

An extra leap second has to be inserted at the end of 2008, so this is how you should count down on New Year's Eve to celebrate the start of the International Year of Astronomy according to Irish astronomers. The extra second is needed to bring the uniform measure of time used by physicists using atomic clocks back into nearly exact agreement with time as measured by the rotation of the Earth. ... There will be national and international events organized throughout the year to mark the occasion. ...

In the Centre of Computer Technologies (CCT). ... IATE Rector Prof. Yu.A.Kazanskyi; therd – Vice-leader CCT N.M.Timofeeva; . Leader of the Project Prof. G.M.Tamkovich . Near CCT building, Leader of school group S.Tamkovich . and Leader of the Project Prof. G.M.Tamkovich . ... First – Leader of scientific program Prof. S.I.Klimov; . Second – Leader of the Project prof. G.M.Tamkovich . Space Research Institute (IKI RAN). ...

... The tracking system works in micro-step regime with a computer step of correction = 0.003 arcsec per second of time and a maximum speed of correction up to 4.6 arcsec per second of time. ... The APD module was constructed for performing experiments of receiving of 2 Mbps signals from “ARTEMIS” using the Cassegrain focus of 0.7m telescope. ... GaAs PIN photo diode. ... Laser module with thermoelectric stabilisation of laser diode. ... Electronic module for turbulence compensation system . ...

... Currently a 50MHz 486DX PCBrand personal computer, located on the fourth floor in the warm room in lab number 443C, is used to control the charge coupled devices (CCDs). ... The PC is connected to a monitor and keyboard in the warm room and another pair in the dome itself. ... An intercom system simplifies communication between the dome and the warm room. ... The second intercom in the dome is used for two way communication between the dome and the warm room. ...

spectrum1d - compute auto- [and cross- ] spectra from one [or two] timeseries. spectrum1d [ x [ y ] file ] -S segment _ size ] [ -C ] [ -D dt ] [ -N name _ stem ] [ -V ] [ -W ] [ -bi [ s ][ n ] ] [ -bo [ s ] ] spectrum1d reads X [and Y] values from the first [and second] columns on standard input [or x [ y ] file ]. ... Units same as ypower. name _ stem .npower Power spectral density of the noise output. Units same as ypower. name _ stem .gain Gain spectrum, or modulus of the transfer function. ...

13-20 November 2003 . 13 Nov, 05:01 M1.6 AR 0501, N04E90 LASCO: EIT, 195 A: fix , run . 13 Nov, 09:29 M1.4 AR 0501, N04E90 LASCO: C2 , C3 EIT, 195 A: orig , fix , run . 17 Nov, 09:05 1N/ M4.2 AR 0501, S01E33 LASCO: C2, C3 EIT, 195 A: orig , fix , run . ... 19 Nov, 04:01 1N/ M1.7 AR 0501, N01E06 LASCO: EIT, 195 A: fix , run . 19 Nov, 08:17 1F/ C8.8 AR 0501, N03E01 LASCO: C2 , C3 EIT, 195 A: fix , run . 20 Nov, 02:12 1N/ M1.4 AR 0501, N03W08 LASCO: EIT, 195 A: fix , run . ...

... December 5, 1999 . Rhea: Saturn's Second Largest Moon . Credit: Voyager , NASA ; Copyright: Calvin J. Hamilton . Explanation: Rhea is the second largest moon of Saturn , behind Titan , and the largest without an atmosphere. ... Rhea 's rotation and orbit are locked together (just like Earth's Moon ) so that one side always faces Saturn. A consequence of this is that one side always leads the other. ... About APOD > . ... NASA Technical Rep.: ... A service of: LHEA at NASA / GSFC . ...

... Rhea: Saturn's Second Largest Moon . ... Credit: Calvin J. Hamilton Explanation: Rhea is the second largest moon of Saturn , behind Titan , and the largest without an atmosphere. ... Rhea 's rotation and orbit are locked together (just like Earth's Moon ) so that one side always faces Saturn. ... NASA's Cassini spacecraft is currently on route to Saturn and will arrive in 2004. ... Publications with keywords: Rhea - Saturn - Voyager 1 . Publications with words: Rhea - Saturn - Voyager 1 . ...

... When the computer loads a boot sector on a normal Linux system, what it loads is actually a part of lilo, called the ``first stage boot loader''. ... This reads the configuration file /etc/lilo.conf and writes the boot loaders, and information about the operating systems it can load, to the hard disk. ... The configuration file for lilo is /etc/lilo.conf . ... It is easy enough to get something wrong and screw up your master boot record and make your system unuseable. ... Set up lilo on a floppy...