tranback -- Transform an X,Y position from output to input pixel position using the same conventions as drizzle tranback xout yout . xout = 400 [real] . ... The X dimension of the input image (this is used to determine the centre which is the origin of the transformations). (nyin = 800) [real] . ... If "output" the input image center is mapped to the center of the output grid, rotated about that center and then shifted along the grid of the output image. ...

... THE 'VON OPEL FLIGHTS' . ... Raab, with his partner Diploma Engineer Kurt Katzenstein would apply to their lightest aeroplane the solid-propellant Sander rockets that had proven themselves so well in Fritz von Opel's rocket cars. ... The von Opel-Sander-Stamer-Lippisch tests were elevated to a full-scale airplane immediately after the model flights ; in effect, this was to be the first manned rocket flight. ... FRITZ VON OPEL at the controls of the Opel Sander Rak. 1 rocket plane. ...

... This applet generates an observing list based on an observer's location and time. ... To use this program, enter in your location, and the local times at which you wish to begin and end observing. The date you enter should correspond to the calendar day at the time at which you begin observing. For example, if you wish to observe from 9:37 PM October 23, 2007 until 3:21 AM October 24, 2007, you would enter 21:37 for the starting time, 03:21 for the finish time, and 10/23/2007 for the date. ...

... All the service systems of SC "Spectra-R", (deployment of the antenna, its fixation, switching on of the onboard H-maser, pointing of the sharp directional antenna to Puschino TS) are checking. July, 23rd, 2011 -- deployment and fixation of the SRT antenna is done. ... July 26th, 2011 -- a procedure of onboard H-maser thermostats switching on preparation was done. ... Within two hours the communication session with Puschino TS in mode loop of phase stability (a phase loop) was proceeded. ...

... PUL2 catalog contains original absolute proper motions of 59646 stars in 149 fields with galaxies. ... Mean errors of relative proper motions in PUL2 catalog is 5.5 mas/year. ... The external mean error of one relative proper motion of a bright star of PUL2 catalog is 9 mas/year for both of coordinates. ... After issue of UCAC2 catalog, we decided to improve accuracy of proper motions, using Pul-3 coordinates (of 1950s) as the first epoch, and UCAC2 coordinates as the second epoch. ...

. Comment on J0318+4151 . No detection: according to global VLBI observations at 5 GHz by Xu, O'Dea & Biretta (1999), the core of this double-tail radio galaxy has a brightness of 13 mJy/beam, too weak for us to be detected. VLBApls home page . Last modified: 16 Oct 2000

... For the past years I have been working on the problem of synthesis of light curves of close binary systems, consisting of a normal star and a compact object (point object with fixed X-ray luminosity). ... Possible existence of a bright spot on the disk's lateral surface is taken into account. ... The last of then will be published in Gordon and Breach Publishers ( Cherepashchuk A.M., Katysheva N.A., Khruzina T.S., Shugarov S.Yu. ... Cherepashchuk A.M., Katysheva N.A., Khruzina T.S., Shugarov S.Yu. ...

... Space research, space communication including TV and radio communication with using satellite systems, Earth and ecological monitoring, the use of satellite, navigation and topogeodesic systems, manned missions, material production in space and lots of other operations could be related to space activity. ... A special 5-year program was developed involving regular Shuttle missions with join crews. ... БИК 2-3 system and "Symbol D" system telemetry data are used to control the Station; . ...