... Abstract This routine computes the Jacobian of the transformation from spherical to rectangular coordinates. ... dx/dr dx/dcolat dx/dlon | ... Given a state in spherical coordinates ( r, colat, lon, dr, dcolat, dlon ) the velocity in rectangular coordinates is given by the matrix equation: t | ... Determine the Jacobian of the transformation from cylindrical to rectangular at the coordinates at the given cylindrical coordinates at time t./ drdsph_c ( r(t), colat(t), lon(t), jacobi ); /. ...

Next: ZGSC (Compressed GSC) and XSKYMAP . ... This is a preliminary report on an investigation of the quality and properties of plates digitized during creation of the Guide Star Catalog (GSC). The results will be vital for reclassifying GSC objects. ... Many objects are measured on more than one plate, and thus have multiple catalog entries. ... Among the shortcomings of the GSC are: biased magnitudes and incorrect classifications for certain objects, presence of artifact objects. ...

... Archives . ... Quote] The ?Bible? ... The abstract has one sentence: There are none and the first paragraph of this short paper explains the uniqueness of the abstract: . ... However, for even the single-input, single-output case there has remained the question of whether there exist any guaranteed margins for the full LQG (Kalman filter in the loop) regulator. ... Tags: abstract , Kalman filter . ... Comment ( RSS ) | ... I think I have to correct about Kalman filter. ... Chandra Blog . ...

... The task operates on any image. ... Parameter Mand Type Default Constraints imageFile yes string name of the data set containing the image imageName yes string image name of the block containing the image regionFile yes string name of the data set containing the region to be analyzed. qualityFile no string name of the data set containing the quality data . qualityName no ... Any data set containing an image and, optionally, a quality and error arrays. ...

Authors: T.V. Borkova , V.A. Marsakov , . ... It is found that dispersions of spatial and kinematics characteristics of field stars change abruptly when the metallicity crosses the boundary [Fe/H] -0.95 . ... По опубликованным прецизионным наземным и спутниковым измерениям собственных движений, компилятивным лучевым скоростям и фотометрическим расстояниям вычислены компоненты пространственных скоростей и элементы галактических орбит для 174 переменных звезд типа ab RR Лиры околосолнечной окрестности. ...

... This program will be a part of AATM-0.06 examples when this version is released. ... Comments regarding this example welcome at: // Bojan Nikolic b.nikolic@mrao.cam.ac.uk // # include string # include vector # include iostream # include fstream // Unfortunately the using statement below is required because of poor // desgin of the header files using namespace std ; # include ATMRefractiveIndexProfile.h # include ATMPercent.h # include ATMPressure.h # ...

... Despite the wide spread use of the terms MTF, CTF, limiting resolution, minimum resolvable target, and contrast to describe CCD image system quality, the terms are often misused and their relations are little understood. ... The modulation transfer function (MTF) is a Fourier transform of the line spread function i.e. its equivalent as an integral sum of sine waves taken over the whole range of spatial frequencies. MTF by its Fourier nature can only be used to operate on sinusoidal frequencies. ...

... ATNF Home . About ATNF . ... About ATNF overview . ... Governance overview . Australia Telescope Steering Committee . ... Australia Telescope User Committee . ... Our people overview . ... Publications overview . ... Murchison Radio-astronomy Observatory . ... Parkes radio telescope . ... Mopra radio telescope . ... Parkes | ... Visiting Parkes radio telescope . ... Parkes radio telescope webcam . ... We summarize recent attempts to detect warm ionized gas at large galactocentric distances. ...

... connection points . ... The point P3 is the connection between the horizontal and vertical actuators and is the axis of rotation for the tail gunner motion. processing: survey/020204/reduc We can compute P3,P5 (the moveable points) in dome centerline coordinates if we have the actuator distances and we know the positions of the above connection points in dome centerline coordinates for a given position of the tertiary (say the nominal focus position).(see actuator distances to dome centerline ). ...

The Network Time Protocol (NTP) is used to synchronize the time of a computer client or server to another server or reference time source, such as a radio or satellite receiver or modem. ... Information on the NTP architecture, protocol and algorithms can be found in the following articles and reports, which are available online . Mills, D.L. Internet time synchronization: the Network Time Protocol. ... Mills, D.L. Network Time Protocol (Version 3) specification, implementation and analysis. ...

ON THE IMPACT OF THE GALACTIC ABERRATION ON VLBI-DERIVED PRECESSION MODEL Z.M. MALKIN Pulkovo Observatory Pulkovskoe Ch. ... Corrections to adopted precession rate are usually computed from the linear trends in long-term time series of celestial pole offset (CPO), which are the differences between the measured and the theoretical coordinates of the celestial pole. ... CONCLUSIONS We have estimated the impact of GA on parameters of precession-nutation model derived from VLBI observations. ...

Organiser: Xavier Caruso (CNRS, Poncelet Laboratory) . ... Isogenies are an essential tool in Elliptic Curves cryptography, where they are used in a wide variety of area: fast point counting, complex multiplication methods.. V lu's formulas give an efficient method for computing such isogenies, but there were no known formulas for computing isogenies for hyperelliptic curves of higher genus, except in particuliar cases. ... Poncelet Laboratory web page . ...

Next: Introduction Up: Old neutron star distribution Previous: Old neutron star distribution . The population of old galactic neutron stars is computed for model galactic potential and initial neutron star velocity distribution following from binary system evolution scenario. ... Statistical tests appropriate to the problem of gamma-ray burst space distributions are carried out for the obtained distribution. Key words: pulsars - old neutron stars - space distribution - gamma-ray bursts . ...

... In addition to time, frequency, and scale, there are two other coordinate axes within this transform space: shear-in-time (obtained through convolution with a q-chirp) and shear-in-frequency (obtained through multiplication by a q-chirp). Signals in this multidimensional space can be obtained by a new transform which we call the ``q-chirplet transform'', or simply the ``chirplet transform''. ... CHIRPLET TRANSFORM SUBSPACES . ... Relationship Between Auto Chirplet FF Plane and Radon Transform . ...

University Satellites and . Space Science Education . ... The computer-based practical stereo measurements training course in the aerospace education for the students of geographical specialities . ... The two main systems are the computer-based stereocomparator supporting visual stereo measurements at the monitor of a personal computer and the research stereo correlation utility for automated measurements of the aerial and satellite images for digital elevation models construction. ...

The Yarkovsky Effect in the Motion of NEAs . ... In this paper we evaluate the Yarkovsky effect on the motion of NEAs under the assumption that this acceleration depends on heliocentric distance as 1/r 2 and is characterized by the transverse component 2 in the orbital coordinate system. ... In some instances the Yarkovsky effect can be estimated by using only optical observations. Accounting for the Yarkovsky effect permits to include more optical observations in the orbit fitting process. ...

pic] POSTGRADUATE OPPORTUNITY DEPARTMENT OF APPLIED SCIENCE Full time M.Sc. by research Astrophysics - Exoplanet Search by Grid Computing Abstract Industry has highlighted a need for skilled postgraduates in ICT in general and in high-end computing in particular. ... In cooperation with CIT, a sophisticated analysis technique will be applied to large catalogues containing hundreds of millions of star references to select the best candidates from which to search for exoplanets. ...

http://www.mso.anu.edu.au/~ralph/freefree.html . Ralph S. Sutherland . New calculations of free-free transition matrix element integrals are performed using modern symbolic computing techniques to evaluate the hypergeometric functions with complex arguments. The results are presented in both graphical and tabular form including accurate extrapolation methods. ... http://msowww.anu.edu.au/~ralph/data/freefree/ . ...

... INSTITUTE OF RADIOENGINEERING AND ELECTRONICS . ... The use of such a division is shown to open wide possibilities for application of chaos in modern communication systems and computer networks. Novel quality of the systems and networks can be achieved by means of not only designing new technological hardware, but also by modification of certain equipment modules and corresponding software. Examples of using chaotic encoding for computer networks are considered. ...

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