This service contributes to the International Service of Geomagnetic Indices (ISGI) of the IAGA . ... The Kp numbers of the previous month are available in tabular format . ... There are available also historical and current Kp and derived indices per anonoymos FTP (see below). ... U.S.A. FTP server: ftp://ftp.ngdc.noaa.gov/STP/GEOMAGNETIC_DATA/INDICES/KP_AP/ . monthly update) . ... contains the monthly Kp / ap tables in a simple text format readable for both humans and computers (*.tab). ...

... Step 1: The magnetic field line tracing from the satellite position up to magnetic equatorial plane using IGRF magnetic field model. Step 2: Tracing back from the point (produced on the Step 1) to the Ionosphere (by using only dipole magnetic field) . ... The magnetic field line tracing from the satellite position up to the Ionosphere (the stop trace altitude 110 km) using Main (dipole) + Extraterrestrial magnetic field model (for example, Tsyganenko [1987], or [1989], or [1990] ) . ...

Lisnyky observatory of A&SPD is located in the village of Lisnyky in Kyiv region. AZT-8 (right) Diameter 0.7 m, Newton, Cassegren. ... Spiral jets of comet Hale-Bopp have been observing on the 3-rd of April, 1997 with 70-cm reflector and image intensifier, time of exposure: 1 second, field of vision: 1.5 minute of arc. This color image was obtained with Fuji color film (Super Plus 400) in focal plane of the 70-cm reflector (F = 27 m) at Lisniki Observatory by A.M.Evtushevsky. ...

INTERELATION OF GEOMAGNETIC DISTURBANCES AND SOLAR WIND PARAMETERS Ivanov V.G., Miletsky E.V. Central astronomical observatory of RAS at Pulkovo Abstract Interrelations between characteristics of geomagnetic activity and parameters of the solar wind are investigated. ... Relatively simple relations that link variations of geomagnetic activity and solar wind parameters are found. The obtained models allow quantitative estimation of influence of the solar wind parameters upon geomagnetic activity. ...

... Research objects and scientific purposes . Space scientific program includes development and launch of two supersmall spacecrafts "Universitetskiy" and "Kompas-2" intended for monitoring of radiation conditions near the Earth. ... All the studies conducted in the near-Earth space are characterised by strong radiation fields. ... The circular polar orbits, which cover all the near-Earth space, are the most favorable for comprehensive studies of the radiation conditions near the Earth. ...

... With a coronal mass ejection (CME) headed our way and an immense sunspot group tracking across the solar photosphere, skygazers should be on the alert. The interaction of clouds of energetic particles from the active Sun with planet Earth's magnetosphere often produce significant geomagnetic storms and auroral displays. ... Publications with keywords: aurora - coronal mass ejection - geomagnetic storm - active sun . ... Sun Storm: A Coronal Mass Ejection . ... An Aurora Before the Storm . ...

... Wang, Y. M.; Ye, P. Z.; Wang, S.; Zhou, G. P.; Wang, J. X. A statistical study on the geoeffectiveness of Earth-directed coronal mass ejections from March 1997 to December 2000, // J. Geophys. Res. ... Gosling J. T. , The solar flare myth// J.Geophys.Res., ... Lindsay G.M., Luhmann J.G., Russell C.T., Gosling J.T. Relationship between coronal mass ejection speeds from coronagraph images and interplanetary characteristics of associated interplanetary coronal mass ejections// J.Geophys.Res. ...

. Observational data . • . Geomagnetic variations in Yakutsk . • . Cosmic ray variations in Yakutsk and Tixie Bay . • . Riometer data for Tixie . • . Satellite monitoring of surface . • . Space weather forecast . • . Ionospheric Station Yakutsk .

NOAA realtime data . NOAA X ray - 1 minute realtime data . ... NOAA Proton fluctuations - 5 minute realtime data . NOAA Solar wind . ... World Data Center for Solar-Terrestrial Physics (Moscow) . Latest Irkutsk Magnetogrammes . ... Millstone Hill . ... Latest Millstone elevation scan data . Latest Millstone azimuth scan data . ... Current auroral image from POLAR UVI . ... Canadian magnetometer data from the CANOPUS Chain . ... Current Dst Index . ... Latest Millstone digisonde data ...

... от положения Солнечной системы в Галактике . ... Решена задача о движении Солнца в Галактике и рассчитана орбита Солнца для современной модели гравитационного потенциала Галактики. ... Dependence of the reversals frequency of geomagnetic field . on the position of Solar system in the Galaxy . ... Fourier-analysis of time dependence of geomagnetic reversals frequency for 550 million years is made. ... Geomagnetic reversals during the phanerosoic // Science, v. 172, p. 157, 1971 г. ...

CONTENTS Volume 26 Number 1 (January 1999) . ... BROWN DWARFS AND THE SUB-STELLAR MASS-FUNCTION . ... J. C. Brown . THE MAGNETOSPHERIC SUBSTORM OF 29 APRIL 1997 . F. N. Okeke . ... F. N. Okeke & A. B. Rabiu . C/1881 K1: A FORGOTTEN ``GREAT COMET'' OF THE NINETEENTH CENTURY . ... 1995-1999 Irish Astronomical Journal, Downshay, 12 Heather Lea Avenue, Dore, Sheffield S17 3DJ, S. Yorkshire, United Kingdom WWW Contact: Alastair G Gunn Back to IAJ Home Page ...

Cosmic Ray laboratory of . ... Neutron Monitor (Cosmic Ray Observations) . is situated in Irkutsk (Russia) . ... Height - location above sea level . ... Height: . ... For recording the CR (Cosmic Rays) neutron component at Irkutsk, . neutron monitor NM-64 is used, which is an installation with 18 two-meter proportional counters filled with BF 3 (boron trifluoride gas) in which the B 10 90 per cent of the total boron. ... The neutron monitor is located at 475m above sea level. ...

. Geomagnetic storms disturb EarthтАЩs ionosphere and result in disrupted radio communication. A new monitoring method could let GPS users, such as pilots, know when their receiversтАЩ signal will be affected and for how long. NASA

Next: The Multimission Archive at the Space Telescope Science Institute . Up: Archiving . ... As part of the agreement between NASA and ESA on the continuation of the collaboration on HST, the ST-ECF has been charged with the production of the Post Operational HST Science Instrument Archives (POA). Starting with the Faint Object Spectrograph the data from the instruments which have been removed from the HST will be re-calibrated and made accessible in a uniform manner. ... Rosa 2 . ...

... SOLAR WEB RESOURCES AND RESEARCH SITES LINKS . ... http :// solar .nro.nao.ac.jp/ - The Nobeyama Radioheliograph : daily solar images at 17 GHz. http ://umbra.nascom.nasa.gov/batse/batse_years.html - CGRO BATSE solar flare database at the SDAC. http ://umbra.nascom.nasa.gov/yohkoh_archive.html - The Yohkoh Archive. ftp://140.252.1.21/kpvt/ daily - U.S. National Solar Observatory at Kitt Peak anonymous ftp directories. http ://www.bbso.njit.edu - Big Bear Solar ...

... The Sun is the closest star to us, and a regular object in our Galaxy. Solar activity manifests itself, primarily, in solar flares - episodic explosive energy release in the form of electromagnetic radiation and high energy particles (electrons and protons). The nature of the flares is related to cyclic variations of global and local magnetic fields in the atmosphere of the Sun. ... Such formations are called active regions. ...

... The TRACE images may be used without restrictions in publications of any kind. ... These two images, taken on 18 November 2000 at 15:54UT and 16:11UT, respectively, show such an event: the red circle in the image to the left shows a region where many loops are cooling, with bright loop tops (the intensity scales with the square root of the image to reduce the dynamic range). ... See also a collection of images related to the Sun, other cool stars, and solar-terrestrial effects . ... Images | ...

Effect of the geomagnetic field on the intensity of sodium laser guide stars N.Moussaoui1, R. HolzlЖhner2, W.Hackenberg2, D. Bonaccini Calia2 1 Faculty of Physics, University of Sciences and Technology ... Southern Observatory, Karl-Schwarzschild-Stra!e 2, D-85748 Garching bei MЭnchen, Germany ABSTRACT In calculating the return flux of sodium laser guide stars (LGS), often only the best return conditions are assumed, relying on strong optical ... 2 hyperfine ground state1. ...

... ATNF Home . About ATNF . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Australia Telescope User Committee . ... Astrophysics graduate student programs . ... Australian Square Kilometre Array Pathfinder . Murchison Radio-astronomy Observatory . ... Parkes radio telescope . Australia Telescope Compact Array . Mopra radio telescope . ... Visiting Parkes radio telescope . Visiting Australia Telescope Compact Array . ... Parkes radio telescope webcam . ...

... DEPENDENCE OF ORDINARY WAVE ANOMALOUS ABSORPTION ON THE SOUNDING PROBLEM PARAMETERS . ... Transformation of electromagnetic wave into plasma waves plays an important role in different processes taking place in ionospheric plasma. ... According to modern point of view transformation of ordinary wave into plasma waves plays an important role in small-scale random irregularities generation when ionospheric plasma is heated by power radio wave [1,2]. ... Anomalous attenuation. ...