... This task approximates the gradient at each pixel of an image by doing least-squares fitting of a plane to the 3x3 array of values centred on each pixel. ... The user can choose between a cartesian representation (in which the output images record the x and y components of the gradient) or a polar representation (in which the output images are the magnitude and azimuth of the gradient.) ... No gradient value is calculated at the edge: nulls are stored in the output at these pixels. ...

... Among the objectives of Principal Components Analysis are the following. dimensionality reduction; љ . the determining of linear combinations of variables; љ . ... identification of groups of objects or of outliers. ... Finding a set of principal axes allows the objects to be adequately characterised on a smaller number of (artificial) variables. ... Reduction of dimensionality is practicable if the first new axes account for approximately 75 % or more of the variance. ...

... Abstract Convert a spacecraft clock format string to number of "ticks". ... Detailed_Input sc is the NAIF ID number for the spacecraft whose clock string is being converted. clkstr is a character string representing a spacecraft clock time, WITHOUT PARTITION NUMBER. ... scencd_c converts a clock string to the number of ticks it represents since the beginning of the mission, and so uses partition information. sctiks_c just converts to absolute ticks. ... The SCLK string includes a partition number. ...

... Classes . ... casa . casa::EarthField . ... More... #include < EarthField.h > . ... EarthField (const EarthField &other) . ... EarthField ( EarthFieldTypes model, Double catepoch=51544.5) . ... Make a copy. const Vector < Double >* casa::EarthField::derivative . ... const Vector < Double >& casa::EarthField::operator() . ... Vector < Double > casa::EarthField::agh_p [private] . ... Vector < Double > casa::EarthField::cl_p [private] . ... Double casa::EarthField::dval_p [3][3] [private] . ...

The database contains references to the papers, data files and links to the Internet resources related to measurements and calculations of the optical constants in the wavelength interval from X-rays to radio domain. ... References to some useful books and reviews on the subject (e.g. the classical handbooks edited by E.D.Palik) and links to Internet collections of optical constants and personal WWW pages with related software were also placed in the database. You have arrived at our welcome page. ...

CIMA is more than just the observing tool - in fact, the observing tool is just a part of a bigger package called the CIMA software package. ... There is also a another package called the CIMA WAPP software which contains the WAPP software, the special Tcl/Tk interpreter used by CIMA and support libraries. ... All CIMA software components recognize the following general options that are part of the CIMA version selection system: . ... The select_cima script can be used to set up a default version. ...

... The file names' construction . The flight (m) stage's file set . ... the orbital data used for the flight operation monthly (m) long-term planning, . ... The orbital calculations are based on the initial orbital data determined by KIAM RAN using the orbital radio- measurement treatment. The determined initial orbital data are presented as a state vector (satellite position and velocity) in the J2000 reference. ... Accept the file with extension '.bgr', where the Moscow time (MT=UT+3h) is used. ...

... We present a computer program for modelling energy flux distribution and light curves of eclipsing binaries from far ultraviolet to infrared regions. The Roche model is assumed. Proximity effects of components (reflection of radiation and surface gravity darkening) are taken into account. ... Figure 1: The surface temperature distribution for Algol A-B system before (upper plot) and after (lower plot) correction for temperature due to the irradiation effect. ...

Next: Presentation of the results Up: World Wide Web version Previous: WWW access . On the main page, a very short description of the program may be found. ... The first link brings the user to a very friendly interface of the main code, where all parameters can be set and the calculations can be started. The second lonk provides a list of papers containing the results of the Scenario Machine calculations beginning from 1983 untill 1996 and a short description of the code. ...

... FTP access the basic models is here . ... Below, we put short descriptions of the used SED models for the photometric redshifts providing by the current server . ... The uniqueness of this model consists in expanding to the near IR (NIR) of Rocca-Volmerange and Guiderdoni's (1988) atlas of synthetic spectra with a revised stellar library, which includes parameters of cool stars. ... Homepage of the GISSEL model). ... Another model used earlier is the model of synthetic spectra of Poggianti (1997). ...

... Archives . ... The PCA and ICA is used for separating mixed components with some assumptions. ... The need of source separation methods in astronomy has led various adaptations of decomposition methods available. ... I rarely come up with a paper which gathered and summarized component separation methods applicable to astronomical data. In that regards, the following paper seems useful to overview methods of reducing dimensionality for astronomers. [arxiv:0805.0269] . ... Chandra Blog . ...