... Corrected geomagnetic coordinates | Let us consider as an example two numerical files with names tp.cng This files contain the information about INTERBALL Tail Probe and POLAR magnetic conjugations. ... The predicted magnetic conjugations correspond to the less then 5 deg geocentric angular distance between the footprints. ... dlt - the difference between two satellites corrected geomagnetic local times (on the second line), . ... GLAT (deg) - the satellite geographical latitude, . ...

... Step 1: The Footprint position calculation by the magnetic field line tracing from the satellite position up to the Ionosphere by using IGRF + Tsyganenko [1987] magnetic field model (the stop trace altitude 110 km). Step 2: Tracing back from the Footprint (produced on the Step 1) to the dipole equatorial plane (by using only IGRF magnetic field model up to the geocentric distance 8 RE and dipole field model after this distance). ... Back to the description . ...

. The XMM-Newton website has moved to the following location: . http://www.cosmos.esa.int/web/xmm-newton

Next: Function Specification Up: Outline of the Previous: The Quasi--Newton Method. This method is identical to the Gauss--Newton method where the Jacobian is estimated by finite differences and the Hessian by second order differences. It does not require the programming of the derivatives but makes a lot of function computations. ... It is slower and less precise than the two last algorithms. ... Mon Jan 22 12:06:29 MET 1996 ...

... The biggest difference is seen for the Pleiades, and our hypothesis is that if the Hipparcos distance to the Pleiades is correct, then similar subluminous ZAMS stars should exist elsewhere, including the immediate solar neighborhood. ... 2 ) University of California Observatories/Lick Observatory Board of Studies in Astronomy and Astrophysics University of California, Santa Cruz CA 95064 . 3 ) Dept. of Physics and Astronomy San Francisco State University, San Francisco CA 94132 . ...

The azimuth encoder rack gear is mounted on the inside of the azimuth ring girder. The azimuth encoder turns on this gear as the azimuth moves 0 to 720 degrees. ... The software assumes that this arc length along the encoder rack gear is correct (at a constant radius of 127/2 feet). The error in the radius of the rack gear becomes an azimuth error. To measure the error in the azimuth encoder rack gear, jon hagen built a proximity sensor. ... To compute the az encoder runout error: . ...

... 8, ``Celestial Mechanics'', 2002 First results of GPS orbit determination with GRAPE package using a square--root information filter M. O. Keshin Institute of Applied Astronomy, St. Petersburg, Russia The zero--differenced carrier phase measurements contain the distance be­ tween the phase centres of receiver and transmitter antennas biased by unknown integer number of cycles (phase ambiguities). ... In the case of GPS the problem of solar radiation pressure modelling is of primary importance. ...

University Satellites and . Space Science Education . ... Two micro-spacecraft constellation with solar sails partially compensating the solar gravity allow their placement in the points along the Sun-Earth line behind the standard L1 point, i.e. further out from the Earth and closer to the Sun. The distances of the placement from the Earth and the base distances between such satellites depend on the ratios of their mass to the sail area. ...

... Bad Astronomy . ... Bitesize Astronomy . ... Bad Astro Store . ... Site Info . ... It is from from Voyager 1 and shows a whopping big impact crater dominating the profile of the moon. Note that Mimas is about 400 kilometers across (about 250 miles). ... The wall around the crater is 5 kilometers high, and that central peak rises 6 kilometers above the surface (many impact craters have a large central peak which is caused by a pressure rebound from the impact). ... 2008 Phil Plait. ...

Giant Jupiter. Jupiter . ... Jupiter has no solid surface that is why speaking about its dimensious point the radius of the upper border line of the clouds, where the presseru is about 10 KPa; radius of Jupiter on the equator is 71400 km. ... The Jupiter satellites. ... Nowadays 16 satellites of the Jupiter are known: Adrastea, Mitis, Amaltea , Phina,then 4 Galilei satellites: Io , Europe , Hanimed , Callisto , Leda, Aimalia, Zicitea, Elara, Ananke, Carme, Pasipe and Sinope. ... Jupiter's ring. ...

http://hea-www.harvard.edu/AstroStat/slog/2009/ mads - mahalanobis - distance / 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/2009/ mads - mahalanobis - distance /comment-page-1/#comment-869 ... Comment preview, last we checked, completely messes up the spam filter (not that the filter is all that well behaved now ? ...

Natural Satellites Service. ... Apparent Encounters . of the Tycho-2 Catalogue stars and the main natural planetary satellites . ... Suggestions . ... Here we present the precalculated circumstances of the apparent encounters of the stars of the Tycho-2 Catalogue with the main satellites of Saturn (S1-S8) for the period from November 2004 to February 2010, and with the Galilean satellites of Jupiter for the period from November 2004 to October 2010. ...

IRREGULAR SATELLITES . ... Planetary satellites in the solar system are divided into two types: Regular satellites orbit in circular, equatorial orbits close to the planet. ... Irregular satellites orbit the planet much further out. ... Examples of irregular satellite orbits . ... Unlike the regular satellites which formed with the planet, irregulars originally formed in heliocentric space (eg the asteroid belt) and were later captured in a closed orbit around the planet. ... Nature, 2004). ...

Next: A Universal Diagram for Up: ``Ecology'' of Magnetic Rotators Previous: The Corotation Radius . The interaction of a magnetic rotator with the surrounding plasma to a large extent depends on the relation between the four characteristic radii: the stopping radius, , the gravitational capture radius,   , the light cylinder radius,   , and the corotation radius,   . ... Hence, the classification of the interaction regimes may well mean the classification of magnetic rotators. ...

pro cormass2,list ; ;procedure to pre-process CorMASS 'differenced' images to correct for reset ;voltage decay effects seen in NICMOS3 images. ... Sep '00 ; ; on_error,1 nl=numlines(list) ;find number of files print,'nl: ',nl files=strarr(nl) openr,lun,list,/get_lun readf,lun,files free_lun,lun for i=0,nl-1 do begin oldim=float(readfits(files[i],hdr)) d=size(oldim,/N_DIMENSIONS) if d GT 0 then begin magicsub2,oldim,procim sxaddhist,'Reset Decay Corrected w/ MagSub2',hdr,/PDU name=str_sep(files[i],'.' ...

Galileo false-color image of asteroid 243 Ida and its small satellite Dactyl (at right). ... Central Latitude/Longitude (deg): -20., ... Instrument: Solid State Imaging CCD Camera . ... Instrument Field of View (deg): .46 x .46 . ... Illumination Incidence Angle (deg): 13. Phase Angle (deg): 27. ... Surface Emission Angle (deg): 34. ... NASA Image ID number: P-44131 . ... Code 633, NASA Goddard Space Flight Center . Greenbelt, MD 20771, USA . ... Code 630, NASA Goddard Space Flight Center . ...

... The storm began quite unexpectedly. The strongest geomagnetic storm for the last seven months began on Earth almost precisely at the same time as the solar eclipse reached its maximal stage, the culmination of which occurred at GMT 02:35 (06:35 Moscow time). ... Oscillations of such amplitude in the magnetic field have not been observed since October, 11th of last year, which is more than seven months ago. ... We can only add that the magnetic storm lasted approximately 9 hours. ...

... The EDI drift data were then mapped along the magnetic field lines into the upper ionosphere (~400 km) by use of the Tsyganenko-2002 (T01) geomagnetic field model. ... For estimating the correctness of the model assumptions, the T01, the Tsyganenko-1996 (T96) and the Paraboloid Magnetic Field (PM, Alexeev et al, 1996) model values of the geomagnetic field were compared with the flux gate magnetometer (FGM) measurements on board Cluster. ... T01, 96 and PM model values were analysed. ...

... Basic Observables: Zero-differenced phase and code ionosphere-free combinations of global GNSS network stations, corrected by P1-C1 satellite code biases (cc2noncc), daily observations with 30 seconds sampling rate Sites coordinates : IGb08 reference frame coordinates and velocities Displacements: solid tides, ocean loading, pole tide loading (IERS 2010) Geometric model : Receivers antennas eccentricities, absolute receiver and ...

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