... HST . ... Missions . ... Missions Office . ... HST Overview . ... Although the conversion of telescope offsets from the FOS ( x,y ) reference frame to the telescope (V2,V3) reference frame is provided in the FOS paper products for all acquisition slews, you may occasionally need to calculate this rotation for other purposes. As noted in Chapter 29, the FOS ( x.y ) coordinate system is defined so that the x -axis is parallel to the diode array and the y -axis is perpendicular to the diode array. ...

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... Tonight's Sky . ... The Magazine . News . Observing . ... Community . ... Gravitational wave search provides insights into galaxy evolution and mergers . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Open cluster NGC 2818, spiral galaxy NGC 2964, and spiral galaxy NGC 2976 . ... Astronomy for Kids . ... spacecraft . ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ... Astronomy Magazine . ...

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• spacecraft launches | Astronomy.com
• Astronomy Magazine - Interactive Star Charts, Planets, Meteors, Comets,
• How do spacecraft safely navigate the asteroid belt? | Astronomy.com

... QPOE event times are typically expressed in units of an on-board spacecraft clock. ... The conversion is automatically performed as part of the timing corrections in 8.7.2. The stand-alone task scc_to_utc allows conversion of an arbitrary spacecraft time to UTC. input files: xtimingdata$scc_to_utc.tab ti> scc_to_utc tbl_fname = xtimingdata$scc_to_utc.tab # ROSAT # conversion table input spacecraft clock time (1606720.) ...

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• *wcscoord* -- all purpose coordinate conversion
• *skypix* -- conversion of pixel position to sky coordinates
• Tom's Palm Utilities

lsst.coordConv љ unknown . ... Classes . ... All љ Classes љ Namespaces љ Files љ Functions љ Variables љ Typedefs љ Enumerations љ Enumerator љ Pages . coordConv: Astronomical Coordinate Conversions . The coordConv package provides the following classes and functions. ... Coord : represents a position on the sky, with proper motion and radial velocity; provides easy access to spherical and cartesian position. ... Position conversion functions: . ... Time conversion functions: . ...

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• Coordinate Conversions
• Engineering Papers
• coordConv

GRANAT is the Russian x-ray sattelite launched to the high apogee orbit (200,000 km) and operated almost for 10 years (1989 -1999) , carrying out four major instruments: French SIGMA coded-mask hard x-ray telescope (30-1000 keV), Soviet ART-P coded-mask telescope (2??-60?? keV), all-sky monitor WATCH (6-150 keV), and a gamma-burst detector PHEBUS . ... Since September 1994, GRANAT is in the survey mode. ... Explore pages devoted to individual GRANAT instruments (including main scientific results): . ...

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... Here, $\lambda = {-180^{\circ}} \ldots {+180^{\circ}}$ is the longitude and $\varphi = {-90^{\circ}} \ldots {+90^{\circ}}$ the latitude in the original coordinate system. ... begin{equation*} \tan(l_{0} - l) = \frac{\cos(\delta) \sin(\alpha - \alpha_{0})}{\sin(\delta) \cos(\delta_{0}) - \cos(\delta) \sin(\delta_{0}) \cos(\alpha - \alpha_{0})} \end{equation*} . ... begin{equation*} \sin(b) = \sin(\delta) \sin(\delta_{0}) + \cos(\delta) \cos(\delta_{0}) \cos(\alpha - \alpha_{0}) \end{equation*} . ...

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• PRECDATE
• casacore: casa::Conversion Class Reference
• Unit Conversion

... AstroCC is a coordinate conversion utility for astronomy. It accepts an object designation or the coordinates of an object and calculates coordinates in alternative systems, and at different dates, times, and locations. It also provides lunar and bright planet coordinates to aid in planning observations. ... BJD values may also be retrieved from http://astroutils.astronomy.ohio-state.edu/time/utc2bjd.html which is based on Eastman et al. ... Coordinate data are obtained from SIMBAD. ...

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... The initial descriptions of the FITS format provided a simplified method for describing the physical coordinate values of the image pixels, but deliberately did not specify any of the detailed conventions required to convey the complexities of actual image projections. ... They were CRPIX n for the reference pixel location on pixel axis n , CRVAL n for the coordinate value at that pixel, CDELT n for the increment at that pixel in the coordinate value, and CTYPE n for the type of coordinate. ...

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• Enhanced HST Pointing and Calibration Accuracy: Generating HST Jitter Files at
• A Graphical Planning and Scheduling Toolkit for Astronomical Spacecraft
• ASC Coordinate Transformation-The Pixlib Library

... The simplest way to convert PostScript files into PDF on our Linux machines is to use the ps2pdf command, e.g. ps2pdf file.ps file.pdf . ... If all original files contain only one page then the resulting PDF document would have have one page for each file. ... Step: Add a pdfmark operator in the set-up section so that the list of bookmarks in the resulting PDF document is visible on the left hand side when the file is opened: . ... where bookmark_file is an ASCII file containing the pdfmark...

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• The Chandra Deep Field South
• ESO - First public release of data products from the VISTA public surveys
• Around the Cat's Paw Nebula | ESO

... IAA VLBI Analysis Center . ... First IAA SLR EOP submission to IERS Annual Report . ... Beginning of operational processing of SLR observations . ... We use several program packages for analysis mostly developed at the IAA: GROSS for processing of the SLR observations and analysis of EOP and coordinates time series, OCCAM/GROSS for computation of EOP, station coordinates, and troposphere parameters time series from the VLBI observations, GRAPE for processing of GPS observations. ...

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• AY2016 (contents)
• Keywords_69
• AY2008 (contents)

... The experience of determination of the link between radio sources and dynamical reference frames is presented. To obtain this connection we used a series of very long baseline interferometry (VLBI) observations of the spacecraft Phobos-2 and angularly nearby quasars. ... The dynamical reference frame is determined by equator and equinox of these ephemerides. ... References . ... The relative orientation of the radio and dynamical reference frames can be described by a sequence of three rotations . ...

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• OptInt PmWiki : PmWiki / Upgrading From Pm Wiki 1

Next: Correlator Products . Previous: RSOG Post-Observation Products . ... Merged Correlator Input Log . Calibration and Flag files . SRT Amplitude Calibration Data . ... Phase Calibration (PCal) Data . ... DPC to Correlators . What: The RSOG produces the `merged' correlator input log file based on the Data Processing Logs supplied by the GTSs and on Executed Sequence of Events supplied by GOCG to produce a single correlator input log for all the GTSs for each observation. ...

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• Navigation Pre-Observation Products