Stations in space

نویسندگان

چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

A Space CoBot for personal assistance in space stations

Microgravity environments inside inhabited space stations are particularly challenging for service robots, being quite different from Earth in various ways. In this paper we propose and discuss the design and applicability of a collaborative aerial robot, called Space CoBot, to provide personal assistance to astronauts in microgravity environments. The platform is based on a modular holonomic a...

متن کامل

Soviet Space Stations: Achievements, Trends, and Outlook

It is a widely held belief that the Soviet space program deliberately follows the paths described in the early years of the century by Konstantin Tsiolkovsky. 1 Be that as it may, it is certainly possible to find close parallels between Tsiolkovsky’s writing and the course of events, but more likely these parallels result because modern engineers have arrived at similar solutions to the same pr...

متن کامل

AWARDS: Advanced microwave radiometers for deep space stations

The objective of this study, named AWARDS (Advanced microwave Radiometers in Deep space Stations), is the preliminary design of a transmission Media Calibration System (MCS) to be located at an ESA Deep Space Antenna (DSA) site. The crucial aspect is the capability to accurately retrieve the tropospheric path delay along the line-of-sight of the deep space probe in order to allow precise tropos...

متن کامل

One of the New Features of the Space Power Stations

The limited density of an energy flow (DFE) in the Wireless Power Transmission (WPT) systems of the Space Power Stations (SPS) creates a set of difficulties including the huge antenna sizes especially of the receiving ones. It happened so not only by reason to reach the Fresnel area but by reason to transmit enormous power needed for Earth feeding. These circumstances require sometimes dividing...

متن کامل

SHARING IN THE 1-3 GHz FREQUENCY RANGE BETWEEN NON-GEOSTATIONARY SPACE STATIONS OPERATING IN THE MOBILE-SATELLITE SERVICE AND STATIONS IN THE FIXED SERVICE

Levels of power flux-density (pfd) and fractional degradation in performance are presented as thresholds for coordination of frequency assignments for non-geostationary orbit (non-GSO) space station transmitters in the mobile-satellite service MSS and receiving stations in the fixed service (FS) in frequency bands shared between these services in the 1-3 GHz frequency range. In the annexes, the...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Nature

سال: 1988

ISSN: 0028-0836,1476-4687

DOI: 10.1038/333390c0