EUVITA — An extreme UV imaging telescope array with spectral capability

EUVITA is a set of 8 extreme UV normal incidence imaging telescopes, each of them sensitive in a narrow band (λ/Δλ = 15 to 80), centered at wavelengths between 50 and 175 Å. Each telescope has an effective area of a few cm²; a field of view of 1.2° and a spatial resolution of 10 arcsec.

EUVITA will be flown on the Russian mission SPECTRUM X-G. This satellite will be launched in a highly eccentric orbit with a period of 4 days, allowing long, uninterrupted observations (e.g. 10⁵ seconds). EUVITA's narrow spectral bands allow the measurement of source parameters such as temperature or power law index as well as interstellar absorption, and will resolve groups of strong lines emitted by optically thin hot plasmas.     

“我们相信ARJ21是一个很好的项目”——访罗克韦尔·柯林斯公司商务和支线系统部副总裁兼总经理丹尼·海格森

记者：请您介绍一下罗克韦尔·柯林斯公司在ARJ21-700项目中的参与情况。 丹尼·海格森：作为ARJ21-700项目的19家供应商之一，我们负责为ARJ21-700飞机提供一整套的航电设备，其中涵盖了通信、导航、飞控以及监视各个子系统。     

Transition radio emission of mildly relativistic particles

We report new calculations of transition radiation spectra which are correct for arbitrary energy of a particle at all frequencies down to plasma frequency. The importance of the emission mechanism for solar flares are discussed.     

An Enduring Partnership Professional, Cultural, Personat

20 years ago, in September 1987, an adventure began which was unique in aviation/aerospace publishing. That adventure led to a multimedia partnership which has grown stronger every year since 1987 and developed into a lasting friendship and global business alliance that continues today.     

On the possibility of long-term maintenance of geostationary satellite attitude without using the external information sensors and inertial sensors

The problem of maintaining spacecraft attitude during the loss of information from attitude sensors and inertial sensors is considered. The problem is solved on the basis of the force gyro stabilization principle with producing an angular momentum in the plane of orbit. The redundant mode of attitude maintenance is developed for spacecraft of the Yamal series. The results of testing the mode during the in-flight tests of the Yamal-200 spacecraft are presented.     

The famous son of Ukrainian people V.I. Voznyuk who has provided launch of all ballistic missiles of the cosmodrome Kapustin Yar

The history of the life of V.I. Voznyuk is a history of the phenomenon of the Soviet rocket progress when the engineers with experience of launch of military rocket of small radius of action were testing the ballistic missiles. The remarkable and little-known destiny of Voznuk is the history of the Soviet rocket technology experts who had a severe practical schooling of command by the military forces of the first combat missiles “Katucha” during the grim military years (including the grandiose fight in Stalingrad) and then they have continued to launch the ballistic missiles. V.I. Voznyuk worked as the chief of the first Soviet cosmodrome Kapustin Yar for almost 30 years—since the most difficult moment of its organization. He organized a launch of the first Soviet ballistic missiles R-1, R-2, R-5M of S. Korolev. This report is about the outstanding achievement of the organizing ability of V.I. Voznyuk—about the launch of a missile with a nuclear warhead in 1956. V.I. Voznyuk closes a unique chain in the world of outstanding figures of space-rocket technology who were born or lived in Ukraine from designers of missile up to the organizers of its manufacture and now up to the organizers of the tests of rockets—J. Aizenberg, V. Budnik, O. Baclanov, V. Dogujiev, M. Galasj, N. Gerasuta, V. Gluschko, B. Gubanov, A. Gudimenko, I. Ivanov, G. Kesunjko, B. Konoplev, S. Korolev, V. Kovtunenko, V. Kukuschkin, O. Makarov, A. Nedaivoda, M. Reshetniyov, Yu. Semenov, V. Sergeev, Yu. Smetanin, V. Tchelomey, D. Torchiy, V. Utkin and M. Yangel.