Coordinate Systems used for spacecraft trajectory description: . ... The HGI coordinates are Sun centered and inertially fixed with respect to an X-axis directed along the intersection line of the ecliptic and solar equatorial planes. ... Cometocentric (solar) Ecliptic Coordinate System (CSE) . ... CSE coordinate system for the SC POSITION: axis origin at comet center, X-axis to the SUN, Z-axis to ecliptic north pole, (X,Y)-plane is parallel to the ecliptic plane. ...

Еще в разделе: (Показать все результаты (>689) - www.izmiran.rssi.ru/ )

• VEGA pr-7

... Uniformly moving frames of reference experience no new forces. ... If we want to express the equations of motion in their own frame of reference , we must always add "inertial forces" to represent the effects of their acceleration. ... The centrifugal force is needed to describe the same motion, using coordinates, velocities and accelerations of a rotating frame of reference. ... Terms: inertial force, accelerated frame of reference, rotating frame of reference, centrifugal force, bulge of the Earth...

Еще в разделе: (Показать все результаты (>1469) - www.cosmos.ru/ )

• Accelerated Frames of Reference
• Space physics cordinate systems
• Satellite position in the SE and GSM coordinate systems

During observation the target is placed at the aperture (PC1, WF2, WFALL, etc.) specified on the Phase II proposal. ... The POS TARG special requirement can be used when a position offset is needed. ... The exact directions of the offsets are parallel to the rows and columns of the CCD on which the aperture is specified. ... This is specified in the Phase II proposal using the ORIENT special requirement. ... Figure 7.9 shows the CCD orientation and aperture locations relative to the U3 axis. ...

Еще в разделе: (Показать все результаты (>13878) - www.stsci.edu/ )

• CSPICE Routines: TIPBOD_C
• CSPICE Routines: SURFPT_C
• Chapter?3: Fixed and Generic Targets

... POSITION= Give central position: [0,0] ANGLE= Give angle (deg), w.r.t North towards the East: GRIDOUT= New grid spacing of [spacing in longitude] rotated axis: POINTS= Give number of pixels on rotated axis: [Number of pixels on longitude axis] SLICES= Number of slices above and below slice [0,0] through new projection centre. Total number of slices cannot exceed 256. SPACE= Spacing between slices: [grid spacing in latitude] OUTSET= Give output set: PLOT= Create plot of slice? ...

Еще в разделе: (Показать все результаты (>19510) - www.atnf.csiro.au/ )

• kpvslice: interactive position-velocity slicing
• WCSLIB: sph.h File Reference
• Coordinate System

... Impact on source motion in Galactic coordinate system is given by Kovalevsky (2003), Malkin (2011) l cos b = -A sin l, b = -A cos l sin b, where A = R0 02 /c is the galactocentric acceleration called hereafter the GA constant. ... We just have to return to the traditional many-centuries-old astrometric practice of modelling the position of a celestial object as a linear trend with two parameters: the position at the initial (conventional) epoch and the apparent (proper) motion. ... 2011). ...

Еще в разделе: (Показать все результаты (>305) - www.gao.spb.ru/ )

• http://www.gao.spb.ru/english/personal/malkin/publ/zm12e.pdf

... Coordinate system . It is necessary to specify the coordinate system for the drilling of plug-plates so that the drilling file (currently named plPlugMap), plate drilling, cartridge, rotator wrap and the rotator itself are compatible. ... The TCC rotator angle (object system) is defined to be 0 degrees for this orientation. ... Thus, the rotator angle gives the conventional astronomical position angle on the sky of the y axis (although Russell won't acknowledge this necessarily). ...

Еще в разделе: (Показать все результаты (>676) - www.apo.nmsu.edu/ )

• lsst.tcc: python/tcc/axis/coordConvWithFP.py Source File
• TUI:Telescope:Offset Types
• MCP Menu documentation

... connection points . ... The point P3 is the connection between the horizontal and vertical actuators and is the axis of rotation for the tail gunner motion. processing: survey/020204/reduc We can compute P3,P5 (the moveable points) in dome centerline coordinates if we have the actuator distances and we know the positions of the above connection points in dome centerline coordinates for a given position of the tertiary (say the nominal focus position).(see actuator distances to dome centerline ). ...

Еще в разделе: (Показать все результаты (>3707) - www.naic.edu/ )

• byu phased array feed.
• Orbits in the period / acceleration plane
• rotary floor

... Aurora from Space . ... Magnetic Storms . ... The "ring of fire" seen by satellite cameras around the polar caps (picture below) is probably created by electrons leaking from the tail's plasma sheet, whose magnetic field lines form a somewhat imperfect trap. ... One possible explanation involves the close association between auroral arcs and electric currents which flow along field lines between the ionosphere and distant space ( Birkeland currents ). ... Why no aurora at the magnetic poles? ...

Еще в разделе: (Показать все результаты (>834) - www.iki.rssi.ru/ )

• Lagrangian Points
• Frames of Reference: The Centrifugal force
• A Brief History of Magnetospheric Physics Before the Spaceflight Era

... srcinfov strra=<ra> strdec=<dec> apos=<apos> withsrccoord=true|false . ... srcinfov computes for each instrument the position of a given celestial source in the field of view (in TELCOORD coordinates). Input is the satellite attitude in terms of Right Ascension/Declination of the star tracker viewing direction and astronomical position angle [deg]. ...

Еще в разделе: (Показать все результаты (>6705) - xmm.vilspa.esa.es/ )

• Spatial coordinate systems
• Description

... 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 . ...

Еще в разделе: (Показать все результаты (>2295) - star.arm.ac.uk/ )

• Abstract
• Armagh Observatory

... 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. ...

Еще в разделе: (Показать все результаты (>1495) - www.adass.org/ )

• NICMOSlook and Calnic C: Slitless Spectra Extraction Tools

Weaving together Astronomy+Statistics+Computer Science+Engineering+Intrumentation, far beyond the growing borders . ... Archives . ... A postdoc job announcement from Prof. Joshua Bloom of UC Berkeley: . ... The starting salary will be commensurate with experience, and competitive with other postdoctoral positions. ... Tags: AstroStat , computer science , job announcement , job market , time series , UC Berkeley . ... Joseph Hilbe on [Jobs] postdoc position at UC Berkeley . ... Chandra Blog . ...

Еще в разделе: (Показать все результаты (>3363) - hea-www.harvard.edu/ )

• Spatial Region Coordinates
• *skypix* -- conversion of pixel position to sky coordinates
• *tvimcontour* - Overlay contours and/or source positions on the display

... Iowa Robotic Telescope | ... Talon is based on OCAAS, a software suite developed by software engineer Elwood Downey ( Clear Sky Institute ) for use at the University of Iowa ?s first remote facility (the ATF, or Automated Telescope Facility). ... XObservatory : Telescope Control Interface . ... This program calls upon and coordinates much of the interrelated portions of the Talon architecture, and forms the primary control panel for the telescope, dome, and peripheral systems when used locally. ...

Еще в разделе: (Показать все результаты (>45) - vega.inp.nsk.su/ )

• Positions and Proper Motions

This diagram illustrates the effects of absolutely positioning a box with respect to the initial containing block. ... Most of the "inner" box contents are therefore rendered outside the document window. ... The text that is to the left of the line numbers lies outside the initial containing block. The lines, as they appear in the image, contain approximately: 1 Beginning of body contents. Start 2 of outer contents. End of outer 3 contents. End of body contents. ...

Еще в разделе: (Показать все результаты (>1805) - crydee.sai.msu.ru/ )

• Dynamic HTML in Communicator
• Long description for example illustrating absolute positioning
• Long description for example illustrating positioning with respect to a

Stellarium 0.12.3 . ... TextParams Struct Reference . Parameters specifying how to draw text. ... TextParams (const float x, const float y, const QString &string) . Construct TextParams with default parameters. ... TextParams ( Vector3 < F > &position3D, StelProjectorP projector , const QString &string) . Construct TextParams to draw text at a 3D position, using specified projector. ... string   . ... Text string to draw. ... The required string parameter is also set, as is the projector. ...

Еще в разделе: (Показать все результаты (>676) - astro.uni-altai.ru/ )

• Stellarium: TelescopeClient Class Reference
• Stellarium: TelescopeClientDirectNexStar Class Reference
• Stellarium: TelescopeClientDirectLx200 Class Reference

slitless -- Extract a spectrum from a direct/GRISM image pair slitless image grism output PARAMETERS . ... A two dimensional direct image to be used to select an object. grism . A two dimensional GRISM image containing slitless spectra of objects present in the direct image. output . ... Toggle whether or not a background estimate is subtracted from the extracted object spectrum. mingood = INDEF . Pixels of the grism image with values smaller than this are ignored. maxgood = INDEF . ...

Еще в разделе: (Показать все результаты (>234) - www.stecf.org/ )

• POLIMODEL (V1.00) --- April99 --- POLIMODEL (V1.00)
• POLIMPLOT (V1.00) --- April99 --- POLIMPLOT (V1.00)
• TRAXY (V0.4) --- Dec99 --- TRAXY (V0.4)

Next: Catalog Construction Up: Observations and Analysis Previous: Source Detections . ... It was assumed that the highest signal gives the most likely position of the source. ... Comparing the summed map with the maps from the individual energy ranges, the one which produced the smallest error box was chosen to represent the source position, as long as was greater than 4, a level chosen to reflect a reasonable degree of confidence in the detection. ...

Еще в разделе: (Показать все результаты (>1788) - www.sao.ru/ )

• Accurate Positions of srcs
• Hypercat help
• HyperLEDA documentation: parameter: celpos

... 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 ...

Еще в разделе: (Показать все результаты (>873) - www.astrosociety.org/ )

• ASP: To Every Season There is a Reason

... This plug-in enables you to add various types of lighting effects to your (RGB) image. ... Directional light . ... Well, you get the idea :) The default settings for this light-type is [-0.5,-0.5,-1.0]. ... Higher values makes your image reflect a lot of light (appear lighter or more intense), while smaller values makes it appear more dull or matte. ... A value of 1.0 makes your image very shiny (bright high-lights) while smaller values makes you image less shiny, making the high-lights dimmer. ...

Еще в разделе: (Показать все результаты (>1855) - www.sai.msu.su/ )

• APOD: 2000 March 9 - Sun Storm: A Coronal Mass Ejection
• Vector Operations

Computer Ephemeris for 2014 from DE200/LE200. ... Sidereal Time. ... Apparent equatorial positions. Ecliptical positions. ... Chebyshev polinomial approximation of positions. ... Position and velocity. ... Dynamical time. Sidereal time. ... Osculating elements of planetary orbits. Planetary configurations (by time). ... Fundamental ephemeris. ... Ephemeris for physical observations. ... Stars. ... All comments on Computer Ephemeris please direct to the author: charlie@mail.univ.kiev.ua ...

Еще в разделе: (Показать все результаты (>113) - space.univ.kiev.ua/ )

• Contents of Computer Ephemeris for 2015 (DE200/LE200).
• Contents of Computer Ephemeris for 2016 (DE200/LE200).
• INFRARED FOURIER-SPECTROMETER SICH-F