In future mobile communications satellites, it is important to increase the transmitting and receiving performance of the satellite to permit the use of small and economical earth terminals. This paper analyzes the relationships between the effective mass of the communications system and the number of ...
Satellite television as a mass medium - ScienceDirectJames Wood CEng, FIEESatellite Communications Pocket Book
It now has an annual output of more than 200 small satellites weighing less than 1 tonne, a storage capacity of 60 satellite parts and 60 whole satellites, and a logistics distribution automation rate of over 95 percent, which greatly improves production efficiency and quality. The rapid developm...
A 6.5-day periodicity in the recurrent nova V404 Cygni implying the presence of a black hole THE X-ray transient source GS2023 + 338 was discovered in out-burst by the Ginga satellite in 1989 (ref. 1) and has since been identified with the previous......
A Berres,K Briess,H Kayal 摘要: The "Satellite Mission Analysis and Simulation System" (SMASS) for small satellites developed at the Technical University Berlin (TU Berlin) is mainly used in the education of aerospace students at universities with the focus on understanding the relations between ...
doi:10.1134/S0010952506050108STABILITY of rotating space stationsA correction to the article "Stability of Resonance Rotation of a Satellite with Respect to Its Center of Mass in the Orbit Plane" that was published in 2006 is presented.Cosmic ResearchSadov, S....
A star expands to become a red giant when it has fused all the hydrogen in its core into helium. If the star is in a binary system, its envelope can overflow onto its companion or be ejected into space, leaving a hot core and potentially forming a subdwa
A distribution function (DF) for galactic satellites is constructed from eagle using specific angular momentum and specific energy, which are scaled so as to be independent of host halo mass. In this two-dimensional space, the orbital properties of satellite galaxies vary according to the host ...
The infall of a satellite galaxy onto a galactic disk generally brings in angular momentum that is not aligned with the axis of the disk. The main dynamica... JE Taylor,A Babul - 《Astrophysical Journal》 被引量: 212发表: 2000年 On the origin and properties of Ultrafaint Milky Way Sat...
Satellite gravimetry (GRACE) observations of monthly surface mass change from April 2002 to June 2017, can be directly compared with model-based AIS SMB estimates. The previous study5 compared GRACE data with ERA-Interim SMB over the period 2003–2013. Here we undertake a similar comparison, now...