On,off position switching is done to remove standing waves from the resulting spectra. ... 1,5,10,20,25,50,100 samples corresponding to great circle angular offsets of .004,.02,.04,.07,.09,.18, and .35 degrees. ... Page 1: rms vs great circle offset. ... Page 2: rms vs little circle offset. ... The rms increase correlates better with great rather than little circle offsets. the 1 usec standing wave starts to be seen in the .07 degree offsets. a .9 usec standing wave is seen at .35 degrees offset. ...

Ground Support of RadioAstron . Control and Tracking Stations . RadioAstron satellite control (command transmission, telemetry, orbit measurements) will be conducted from Evpatoria and Bear Lake control stations. ... Coarse orbit measurements will be carried out from control stations. Each measurement takes ten minutes. ... Orbit measurements at tracking stations give only radial component of spacecraft velocity but the measurements are going continuously during observing sessions. ...

... It also sends commands to the trolley micro to switch between track mode and slew mode. ... Laser head (7702) Linear interferometer (7002) Retroreflector(7003) Various mirrors Beam expanders Fibre optic pickup Measurement board(2002) Datum switch(Sony SETP151) A schematic layout is shown below in Fig 1 Optical fibres connect the receiver to the measurement board and from the laser to the reference input on the measurement board. ... Reset the datum latch circuit. ...

Next: THE SCHED INPUT FILES Up: INFORMATION AND ADVICE ON Previous: Configuration Studies Contents . ... The NAIF software package from JPL is called to read the spice files and calculate positions. The NAIF software significantly increases the size of a SCHED distribution, and the satellite tracking capability is unlikely to be needed outside the AOC. ... To use the tracking capability, a Satellite Initialization section needs to be included in the main input file. ...

... This document and the attached postscript figure document an analysis that I did to determine the optimum midpoint and required ranges for both the rotator and azimuth for the 2.5 M telescope. ... I simulate a series of drift scans on the sky for tracks that cover the northern survey area. These tracks cover the range in survey latitude of -60 to +60 degrees, spaced by 10 degrees. ... Along each track the azimuth, elevation, and position angle of the CCD is computed at 1 minute intervals. ...

... The HST uses an onboard model of its orbit to perform in real-time various control functions relating to spacecraft operations and observation support. ... New coefficients for the ephemeris are updated every other day, and are archived as FITS keywords for each HST observation data set. Using these coefficients,an observer can perform a variety of calibration and characterization calculations relating to the orbital position and velocity of the telescope. ...

... Positions in 2000 - Jan - Feb - Mar - Apr - May - Jun - Jul - Aug - Sep - Oct - Nov - Dec . Positions in 2001 - Jan - Feb - Mar - Apr - May - Jun - Jul - Aug - Sep - Oct - Nov - Dec . Positions in 2002 - Jan - Feb - Mar - Apr - May - Jun - Jul - Aug - Sep - Oct - Nov - Dec . Positions in 2003 - Jan - Feb - Mar - Apr - May - Jun - Jul - Aug - Sep - Oct - Nov - Dec . Positions in 2004 - Jan - Feb - Mar - Apr - May - Jun - Jul - Aug - Sep - Oct - Nov - Dec . ...

Establishment and Observation of Space Debris Laser Ranging Zhang Zhongping, Zhang Haifeng, Wu Zhibo, Li Pu, Meng Wendong, Chen Juping, Chen WanZhen Shanghai Observatory, Chinese Academy of Sciences Contents: Introduction Establishment of laser ranging to space debris system Observation results Summary Introduction Large amount of space debris around the earth currently. ... Laser ranging (LR) is a kind of real-time measuring technology with meter or sub-meter precision for space-debris observation. ...

Beijing Ancient Observatory . ... Credit Copyright: Judy Tobin Explanation: Did observatories exist before telescopes ? One example that still stands today is the Beijing Ancient Observatory in China . ... It is interesting to compare the above picture to one taken in 1895 . ... NASA Web Site Statements, Warnings, and Disclaimers . NASA Official: Jay Norris. ... A service of: LHEA at NASA / GSFC . ... U. Based on Astronomy Picture Of the Day ...

I/146 Positions and Proper Motions (Roeser+ 1988) ================================================================================ Catalogue of Positions and Proper Motions Roeser S., Bastian U. =1988A .. ... 449R ================================================================================ ADC_Keywords: Positional data; Proper motions Description: PPM North gives J2000 positions and proper motions of 181,731 stars north of -2.5 degrees declination. ... The mean epoch is near 1931. ...

http://hea-www.harvard.edu/AstroStat/slog/2007/ arxiv -the- importance -of- being - first - position - dependent - citation -rates-on-arxivastro-ph/ Weaving together Astronomy+Statistics+Computer Science+Engineering+Intrumentation, far beyond the growing borders Fri, 01 Jun 2012 18:47:52 +0000 hourly 1 http://wordpress.org/?v=3.4 http://hea-www.harvard.edu/AstroStat/slog/2007/ arxiv -the- importance -of- being - first - position - dependent - ... Thank you for your positive comment. ...

... Activity 3: Measuring the Position of the Sun in the Sky . Purpose: To give students the opportunity to measure the position of the Sun in the sky using simple tools and methods. ... Alternatively, you may have students devise their own methods of relative measurement and apply them to measuring the position of the Sun in the sky. ... Rangi is the sky, and when the Sun is near Rangi's head it is summer in New Zealand. ... Read the Maori story to students. ... back to Teachers' Newsletter Main Page ...

... FIELD | ... static int . ... Field Detail static final int AREA . ... Constant Field Values . static final int MEAN . ... static final int STD_DEV . ... static final int MODE . ... static final int MIN_MAX . ... static final int CENTROID . ... static final int CENTER_OF_MASS . ... static final int PERIMETER . ... static final int LIMIT . ... static final int RECT . ... static final int LABELS . ... static final int ELLIPSE . ... static final int INVERT_Y . ... static final int CIRCULARITY . ...

... Science User Portal . ... ESO, the European Southern Observatory . ... Travel and Contacts . Travel to ESO Headquarters . ... Travel to E-ELT Armazones . ... ESO . ... Survey Telescopes . ... Star Clusters . ... Stars@ESO . ... ESO Science Newsletter . ... Catch a Star 2013 . ... View of one of the paths (later to be completed with railway tracks) along which the smaller, moveable telescopes of the Very Large Telescope Interferometric array (VLTI) will later be brought into different positions. ...

... The previous example, Chapter 12, "Expanding Colored Squares Example," illustrates how to expand and contract the clipping region of a layer without changing the wrapping width of the layer. This example illustrates how to capture mouse events so that the user can make a layer's wrapping width wider or narrower by dragging the mouse. ... how to capture mouse events for a layer . how to change the wrapping width of a layer by using the load() function . ... Capturing Events for the Layer . ...

Astronomy Terms - To Help You Study The Universe . Articles | ... Learning about the universe, or the study of astronomy, can be fun for the individual or for the whole family. ... Learning a few simple terms will help you with this fascinating study. ... You will use a telescope or binoculars for your observation of the sky at night. ... Celestial Terms . ... Meteor or a shooting star – the light caused when a meteoroid burns up in Earth's . ... www.astronomy.net . About Astronomy Net | ...

Stellarium 0.12.3 . ... Classes . ... gSatTEME Class Reference . Sat position and velocity predictions over TEME reference system. ... Set compute epoch for prediction. ... gVector љ . ... Get the TEME satellite position Vector. ... Get the Geographic satellite subpoint Vector calculated by the method compute SubPoint. ... gVector Satellite position vector meassured in Km. x: position[0] y: position[1] z: position[2] . ... gVector Satellite Velocity Vector measured in Km/s x: Vel[0] . ...

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Galileo showed convincingly that heavy objects fell no faster that light ones. ... If an iron ball was pulled down with a much greater force than a wooden one of the same size, why didn't it fall any faster? ... 1) It is harder to lift. ... It is the fact that the loaded wagon has a greater mass that gives it a larger inertia , a larger tendency to oppose any change in its state of rest or of constant motion in a straight line. ... One important quantity was the body mass of the astronauts. ...

The following parameters as a function of the universal time are enclosed in this file. 1. no . ... Universal time date (YYYYMMDD) . ... Universal time (.hhmmss) . ... Geomagnetic local time in the satellite position . ... geomagnetic latitude . ... co-ordinate - . ... system . ... co-ordinate system . ... Solar-ecliptic co-ordinate - . ... Satellite velocity . ...