... lccorr (lccorr-2.0.5) [xmmsas_20030110_1802-5.4.1] . ... At present lccorr bin-averages these numbers to the same bin times and size as the TS and includes them on this basis in the calculation of FRACEXP . Several alternative schemes are possible: . Scheme . ... No added noise . Wrong total flux . Simplest scheme . No provision for slow drift in CR intensity . Bin to same fineness as TS . Correct total flux . Added noise . Correct for slow drift in CR intensity . ...

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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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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. ...

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• difx:spacecraft [ATNF VLBI Wiki]
• casacore: casa::SolarPos Class Reference
• casacore: casa::Aberration Class Reference

... Next: The PROS Big Up: Software Systems Previous: Data Reduction Software . ... The srcinten task provides PROS users with a tool to compute count rates for point sources in the ROSAT High Resolution Imager (HRI). ... Corrected upper limits are cited at locations where the count rate falls below the source detection threshold. ... Srcinten is a new PROS task that computes and applies the above correction factors to the net counts in a user-specified aperture. ...

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• A Graphical Planning and Scheduling Toolkit for Astronomical Spacecraft
• Calculating the Position and Velocity Components of HST
• The Observatory Monitoring System: Analysis of Spacecraft Jitter

... The IRAF task rvcorrect is used to compute radial velocity corrections. rvcorrect is in the IRAF astutil package and it calls on task observatory , which is also found in astutil. The following steps are an example of its use for an HST dataset where the HST velocity around the Earth is ignored (maximum residual: +/- ~7.8 km/s): . ... Here is an example of file rvcor . ... Run the rvcorrect task: cl>rvcorrect f=rvcor.in > outputfile The above example produced the following output file. ...

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• http://www.stsci.edu/documents/dhb/webvol2/c12_ghrserrors.fm8.html
• http://www.stsci.edu/documents/dhb/webvol2/c08_fosdataanal.fm.html
• ACS Data Handbook

... The spacecraft of Magion type have been selected as the subsatellites of the Interball project: Magion-4 (C2-X) for the Tail Probe and Magion-5 (C2-A) for the Auroral Probe. ... Magion-4 was produced in the Czech Republic in collaboratrion with Russia, Ukraine, Hungary, Austria and has onboard scientific instruments and sensors designed and built in Czech Republic, Russia, Poland, Hungary, Romania, Bulgaria and Slovak Republic. ... Plasma flow detector VDP-S (Czech Republic, Russia) . ...

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• About modification of the INTERBALL orbital elements
• From Stargazers to Starships
• Inventory

Triad, launched September 2, 1972, was an experimental spacecraft designed to move in an accurately predictable low-altitude orbit, allowing its position to be used as a reference point in navigation. ... While the "proof mass" thus moved in an accurately predictable orbit, the spacecraft itself was subject to air resistance and sunlight pressure, causing it to move slightly differently. ... Exploration" home page (index) Glossary . Official GSFC Home Page .. NASA WWW Home Page . ...

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• From Stargazers to Starships
• The Wind Spacecraft
• The Lagrangian Point L1

... Ballistics, navigation and flight control of the spacecraft, going to the L2 point of Sun-Earth system. ... and calculation algorithms have been developed: - an algorithm, building nominal trajectories for one impulse flights to the L2 point of Sun- Earth system, including a Moon swingby maneuver or not. - an algorithm, calculating corrections of spacecraft trajectory needed for the flight from Earth to halo orbit and for stationkeeping of the spacecraft moving in halo ...

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• http://www.kiam1.rssi.ru/pubs/20140509_ISSFD24_Ilin.pdf

Halley's Comet . Spacecraft that have visited Halley's Comet . ... Then in 1984 and 1985, five spacecraft from the USSR, Japan and Europe were launched to make a rendezvous with Halley's Comet in 1986. ... This image is a mosaic of 8 images taken by the Giotto spacecraft during the Halley encounter on March 13, 1986. ... Courtesy NASA/JPL) . ... Halley's Comets in 1986 . This image of Halley's Comets was taken during its 1986 appearance. ... Cylindrical Map of the Nucleus of Comet Halley . ...

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• CHIANTI: A Database for Astrophysical Emission Line Spectroscopy
• Mariner 10
• Lunar Orbiter 1

... The barycentric corrections computed in 8.7.1 are applied to the event times in a time-sorted QPOE file. ... output files: rp90_out.qp ti apply_bary input qpoe file name: rp90_sti.qp[ time =(1606720.0:1612809.8)] # see Note 1 2 input correction table filename: rp110590_cor.tab output qpoe file name: rp90_out event definition: medium SCC- UTC conversion table is calibrated to SCC 110883482.0000 first qpoe gti time = J.D. 2448062.97604379, SCC 1606720.00000000 last qpoe gti ...

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• *xflux, hxflux* - Calculation of X-ray Flux
• *scc_to_utc* - Converting Spacecraft time to UTC
• *srcinten* - Calculate Source Intensity

Calibration of ALFA data in LiveData R. Minchin Abstract The calibration factors to be entered into LiveData have been calculated, for the parameters used for the AGES and ZOA E-ALFA pro jects and a method is described for calculating these more generally. ... The calibration factors 1 2 Testing the calibration http://www.naic.edu/~ rminchin/alfacal.shtml Three AGES cubes have so far been constructed using this calibration: the completed NGC 1156 and NGC 7332 cubes and the incomplete Abell 1367 cube. ...

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• radar calibration via satellites

... Research objects and scientific purposes . Space scientific program includes development and launch of two supersmall spacecrafts "Universitetskiy" and "Kompas-2" intended for monitoring of radiation conditions near the Earth. ... All the studies conducted in the near-Earth space are characterised by strong radiation fields. ... The circular polar orbits, which cover all the near-Earth space, are the most favorable for comprehensive studies of the radiation conditions near the Earth. ...

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... 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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• ALMA WVR phase correction algorithms and software Bojan Nikolic web pages (r.
• A Calculation of derivatives

... They are concerned with Attitude Control System of the spacecraft, satellite visibility from tracking stations, limits on the satellite autonomous operations during the orbit, and needs for auxiliary operations with the spacecraft. ... Among the operational constraints the most important one is the number of programmed slews per orbit, which determines the maximum number of radio sources to be observed during one orbit. ... System temperature (K) . ... Progress of the RadioAstron Project in Pictures...

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• DPC Post-Observations Products
• RadioAstron main page, english version

... In most cases it will however be necessary to compute an appropriate airmass using the COMPUTE/AIRMASS . ... It is important to keep in mind that ``mean airmass'' and ``mean atmospheric extinction correction'' are different from the values at mid-exposure, especially for larger zenith distances. ... For reasonable combinations of exposure time and zenith distance, the weighted mean airmass supplied by COMPUTE/AIRMASS should be appropriate. ...

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• Flux Calibration and Extinction Correction
• Long-Slit and 1D Spectra
• Details of the luminosity calculation

... Division , Virginia Polytechnic Institute, Blacksburg, VA, 1954-1955; College of William and Mary, Williamsburg, VA, 19591961 PRE- NASA EXPERIENCE: National Advisory Committee for Aeronautics, Langley Aeronautical Laboratory, Langley Field, VA (1954-1958) · Aerospace Technologist, Fluid and Flight Mechanics Branch (1954-1958) NASA Langley Research Center , Hampton, VA (1958-1961) · Aerospace Technologist, Fluid and Flight Mechanics Branch (1958-1961) · Transferred to ...

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• Astronaut Bio: John Glenn, Jr. 1/99
• NASA - Astronaut Biographies
• Astronaut Bio: Michael Collins

RATAN-600 radio telescope . ... In the "radio-Shmidt telescope" mode the antenna system the South sector of the main mirror with the flat mirror ("South+Flat") of the RATAN-600 radio telescope is used. ... The antenna system the South sector with the flat mirror. ... The flat and circular mirrors of the RATAN-600 form the basis of the system. ... In the case of antenna system "South+Flat" the planoid is flat mirror, the circular reflector of RATAN-600 is the second mirror. ...

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• harak_e

... The plot widgets as shown below are created using Calibrate|Visibility|PLOT . The one on the left is the general plot selection widget, the one on the right, the (data) index selection widget, is created when additional input is required as to the indices of the selected data. ... The calibration is applied to all stars selected in the plot selection widget. ... Below is the screen print after clicking on "Calibrate". Solution calculated for OB= 1, Bl= 1, Ch= 2. RMS [%] = 1.876) . ...

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• A visual tour
• ALMA Pinpoints Pluto to Help Guide New Horizons Spacecraft | ESO
• ArtistтАЩs view of bright spots on Ceres imaged by the Dawn spacecraft

... The SDSS 2.5-m primary mirror is supported in a manner similar to the Apache Point Observatory 3.5-m telescope primary. ... The axial support is provided by 48 air pistons. The pistons have the same diameter thereby applying equal forces with the same air pressure. ... Each group supports a 120њ sector of the mirror. ... Figure 1: CAD drawing showing the 2.5-m primary mirror and the locations of actuators (green circles) These actuators apply forces (10*cos2 N) to correct astigmatism. ...

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• Astrophysical Research Consortium - Apache Point Observatory
• Appendix B
• Astigmatism I

... We have calculated the binary coalescence rate with time using the ``Scenario Machine'' code, which allows us to simulate evolution of large ensembles of binary stars in an artificial galaxy using a Monte Carlo method (see Lipunov 1992, Lipunov et al 1994, 1995 and references therein). ... The source evolution in a galaxy with given star formation rate is thus calculated as , where is the redshift at the turn-on of star formation, which is the second important parameter of the model. ...

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• Calculation of Binary Neutron Star Coalescence Rates
• Results of calculations
• The COOC Criterion (Criterion of Observations versus Calculations)