The Equatorial Inertial (GEI) coordinate system: . The X GEI axis is directed to the point of the spring equinox, . The Z GEI axis is coincide with the Earth's rotation axis, . The Y GEI supplements the right three. The Geographic (GEO) coordinate system: . ... The Solar Magnetic (SM) coordinate system: . ... About space physics coordinate transformation see Russel [1971] and Hapgood [1992] . ... M.A. Hapgood , Space physics coordinate transformations: A user guide // Planet Space Sci. ...

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• SKA-3 Experiment Description

Coordinate Systems used for spacecraft trajectory description: . ... The HGI coordinates are Sun centered and inertially fixed with respect to an X-axis directed along the intersection line of the ecliptic and solar equatorial planes. ... Cometocentric (solar) Ecliptic Coordinate System (CSE) . ... CSE coordinate system for the SC POSITION: axis origin at comet center, X-axis to the SUN, Z-axis to ecliptic north pole, (X,Y)-plane is parallel to the ecliptic plane. ...

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... 2 Magnetic Field . ... A magnetized bar has its power concentrated at two ends, its poles ; they are known as its north (N) and south (S) poles, because if the bar is hung by its middle from a string, its N end tends to point northwards and its S end southwards. ... That flow became known as an electric current . ... An electric current produced a magnetic force! ... The fundamental nature of magnetism was not associated with magnetic poles or iron magnets, but with electric currents . ...

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• Coordinate systems [Oulu]
• Magnetic Fields -- History
• Basic definitions [Oulu]

... Apache HTTP Server Version 2.4 . ... Session encryption support . ... session_crypto_module . ... The session will be encrypted with the given key. Different servers can be configured to share sessions by ensuring the same encryption key is used on each server. ... The SessionCryptoPassphrase directive specifies the keys to be used to enable symmetrical encryption on the contents of the session before writing the session, or decrypting the contents of the session after reading the session. ...

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• mod_cgi - Apache HTTP Server
• mod_authz_dbm - Apache HTTP Server
• mod_imagemap - Apache HTTP Server

slitless -- Extract a spectrum from a direct/GRISM image pair slitless image grism output PARAMETERS . ... A two dimensional direct image to be used to select an object. grism . A two dimensional GRISM image containing slitless spectra of objects present in the direct image. output . ... Toggle whether or not a background estimate is subtracted from the extracted object spectrum. mingood = INDEF . Pixels of the grism image with values smaller than this are ignored. maxgood = INDEF . ...

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• ST-ECF Grism Spectrum Software for NICMOS Grism Data

... SUN MOON MERCURY VENUS MARS, JUPITER SATURN . ... Mars . ... Previously understood that magnetic fields were directly related to rotation, so when I read that Mars, like Venus, didn't have one, my understanding crumbled. What exactly causes magnetic fields in planets? ... RELATED TOPICS: MAGNETIC FIELD . Planetary magnetic fields are definitely related to rotation, but directly not so much. ... Get instant access to subscriber content on Astronomy.com! ...

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• Magnetic fields, subatomic particles, etc., traveling in different directions
• Spacecraft capture an Earth-directed coronal mass ejection | Astronomy.com
• What would a bucketful of our Sun contain? | Astronomy.com

... Chapter 5: Visits, Exposures and Exposure Groups > 5.19 Exposure Containers: Exposure Groups, Coordinated Parallels and Patterns . ... Whenever you wanted to create a set of exposures to be executed in a special way in RPS2 (e.g., a mosaic pattern on a region of the sky), you could specify exposures separately and then link them with exposure-level special requirements. ... Note: You can place containers within containers (e.g., a coordinated parallel container can be inside a pattern container). ...

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• Introduction to Special Requirements:Syntax and Rules
• Introduction to Special Requirements: Syntax and Rules
• Coordinated Parallel Containers

... java.lang.Object ij.gui.Roi ij.gui.Line . ... public class Line . ... int . ... protected double . ... Constructor Detail public Line (int ox1, int oy1, int ox2, int oy2) . Creates a new straight line selection using the specified starting and ending offscreen integer coordinates. public Line (double ox1, double oy1, double ox2, double oy2) . Creates a new straight line selection using the specified starting and ending offscreen double coordinates. public Line (int sx, int sy, ImagePlus imp) . ...

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• PolygonRoi (ImageJ API)
• PointRoi (ImageJ API)

Ray generator for SciSim (GSIM) 4.0 M.W. Beijersbergen and H. Siddiqui January 12, 2005 This is a paper version of the GSIM help. ... GSIM is the ray generator for SciSim. ... 4 3.2 Illumination plane . 4 4 Parameters 4 4.1 Instrument . ... ssimraystat will produce ray statistics for each source speci ed in the le impulse.dat le. impulse has the following con guration parameters:  flux : the source ux, in mm 2 s 1  sourceX : the position of the source along the x-axis in mm. ...

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• Parameters
• Input Files

Data access in GIPSY is done through a set of routines collectively known under the name `` GDS '' (GIPSY Data System). ... A set consists of one or two files: the descriptor file and the image file. ... In GIPSY there are kinds of coordinates: . ... To retrieve a descriptor item, given its name and level, the GDS reading routines start looking at the specified level and if it is not found there, higher levels are tried. ... Every GDS routine has an integer error argument, which often is optional. ...

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• WCSLIB: sph.h File Reference
• WCSLIB: cel.h File Reference
• Flagging a Sector of Data - UVSECTOR

HyperLeda home | Documentation | Search by name | Search near a position | ... SQL Search | The HyperLeda FITS archive contains several dataset of direct-imaging CCD-observations of galaxies. The following datasets were taken with the 1.2 meter telescope of Observatoire de Haute Provence: . ... The catalogue of images published by Z. Frei (1996) is contained in: . ... See also the ESO_LV images (Lauberts and Valentijn 1989) . HyperLeda . ...

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• mod_cgi - Apache HTTP Server
• mod_imagemap - Apache HTTP Server
• Emission-line galaxies

This module provides for execution of CGI scripts. ... Module Identifier: cgi_module Any file that has the mime type application/x-httpd-cgi or handler cgi-script (Apache 1.1 or later) will be treated as a CGI script, and run by the server, with its output being returned to the client. ... Debugging CGI scripts has traditionally been difficult, mainly because it has not been possible to study the output (standard output and error) for scripts which are failing to run properly. ... Status: mod_cgi . ...

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• Apache module mod_imap
• Apache module mod_negotiation
• Apache module mod_log_referer

. To redirect the standard output from a command use the > (greater than) symbol followed by the name of the output file. If the file that you redirect standard output to does not already exist it will be created. For example: grep Smith /etc/passwd > popular . This redirects the standard output from the grep command so that it goes to the file popular . This file will contain all occurrences of the string Smith that were found in the /etc/passwd file. **Caution** . Did You Know? .

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• Removing linked directories that contain links

Next: Rotation Periods of PMS Stars Previous: Direct Monitoring of PMS Stars . Studies using direct detection of periods via rotational modulation have been carried out on stars in several young clusters which are near the zero--age main sequence (ZAMS), including the Hyades, the Pleiades and Persei (see Radick 1988, Schaller et al . ... Rotation in ZAMS clusters has a strong mass dependence. High--mass stars tend to rotate much more quickly than the low--mass stars. ...

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• The AstroStat Slog Blog Archive [ArXiv] 1st week, Nov. 2007
• The AstroStat Slog Ratio
• The AstroStat Slog Laplace transform

Stellarium 0.12.3 . ... TelescopeClient Class Reference abstract . ... getEnglishName (void) const . ... getInfoString (const StelCore *core, const InfoStringGroup &flags) const . ... getJ2000EquatorialPos (const StelCore *core) const =0 . ... getEquinoxEquatorialPos (const StelCore *core) const . ... getJ2000GalacticPos (const StelCore *core) const . ... getSideralPosGeometric (const StelCore *core) const . ... getPositionInfoString (const StelCore *core, const InfoStringGroup &flags) const . ...

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• SphericalTexturedPolygon::TextureVertex Struct Reference
• Stellarium: TelescopeClientDirectNexStar Class Reference
• Stellarium: TelescopeClientDirectLx200 Class Reference

The space between the planets is far from empty. It contains: electromagnetic radiation (photons); hot plasma (electrons, protons and other ions) a.k.a. the solar wind ; cosmic rays; microscopic dust particles; and magnetic fields (primarily the Sun's). While the Sun 's radiation is obvious, the other components of the interplanetary medium were not discovered until very recently. ... Except near some of the planets, interplanetary space is filled with the Sun's magnetic field. ... Sun .. ...

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• The Network Time Protocol (NTP) Distribution
• Kuiper-Oort
• APOD: May 29, 1998 - An Extrasolar Planet?

... Interferometric data files handled by CHAMELEON use the HDS (Hierarchical Data System) format, and have an extension .con for point data files output by CONSTRICTOR and .cha for scan-averaged data output by CHAMELEON. Think of the HDS format as a UNIX directory/file tree contained within a single file. ... The .con files are found in /data/npoi/con on gemini. Output files produced by CHAMELEON are always stored in the current working directory. ...

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• Association logs
• Postscript to PDF conversion
• API Help

grdedit - Modifying the header in a 2-D grdfile grdedit grdfile [ -A ] [ -D xunit / yunit / zunit / scale / offset / title / remark ] [ -R west / east / south / north [ r ] ] [ -S ] grdedit reads the header information in a binary 2-D grdfile and replaces the information with values provided on the command line [if any]. ... Older gridfiles (i.e., created prior to GMT 3.1) often had excessive slop in x _ inc , y _ inc and an adjustment is necessary. Newer files are created correctly. ...

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• Number of accreting X-ray binaries of selected types
• State of the problem

Spacecraft STP Data 1. ... This CD-ROM contains solar flare reports, sunspot numbers and regions histories, total solar irradiance, and solar bursts. ... MAGSAT - 2 discs. ... A Compilation of 1963-1999 Solar Wind Field and Plasma Data, Near Earth and Deep Space - 3 discs. This CD-ROM contains the interplanetary magnetic field (IMF) and solar wind plasma (SWP) data from several spacecraft which have explored the near-Earth and deep space regions over the last three decades. ...

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• http://www.wdcb.ru/stp/data/Images_of_Magnetograms/index.en_o.html
• http://www.wdcb.ru/stp/data/cat6CDR/Cosmic%20Ray%20Data
• http://www.wdcb.ru/stp/data/geomagni.ind/kp_ap/apstar/apindex.fmt

... Parameters of the Moon-perturbed orbit . ... From orbits consistent with this limitation and with the date of the launch October 1, 2000 as an example, an orbit was selected with apogee directed to the North Galactic pole at the begining and rotation of orbit plane was maximized. The initial state vector is given in the inertial coordinate system in epoch J2000.0. ... The orbit has initial perigee radius Rp=7000.0 km, initial apogee radius Ra=343000.0 km and initial period T=8.453 days. ...

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• P R O T O C O L