Geostationary satellite

This paper presents the kinematics modeling analysis of the mechanical system of the geostationary satellite monitoring antenna. Each component of the antenna system is assumed a rigid body.

9p nguaconbaynhay12 13-06-2021 13 3   Download

In this paper, the concept of a simple attitude control method that achieves orbit-raising time optimization and has little design effect on the subsystem, except for on the electric propulsion subsystem, is reported.

6p praishy2 27-02-2019 13 0   Download

Tham khảo sách 'geostationary operational environmental satellites', kỹ thuật - công nghệ, tự động hoá phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

22p nt18104 18-05-2013 38 2   Download

All communications with a geostationary satellite require using an earth station or antenna. Earth Stations may be either fixed (installed at a specific location) or mobile for uses such as Satellite News Gathering (SNG) or maritime applications. Antennas range in size, from large telecommunications carrier dishes of 4.5 to 15 meters in diameter, to VSAT antennas which can be as small as under one meter, designed to support services such as Direct to Home TV (DTH) and rural telephony.

16p chiecxedien 03-01-2013 39 2   Download

Tuỳ thuộc vào độ cao so với mặt đất các quỹ đạo của vệ tinh trong hệ thống thông tin vệtinh được chia thành (hình 2.1): HEO (Highly Elpitical Orbit): quỹ đạo elip cao GSO (Geostationary Orbit) hay GEO (Geostatinary Earth Orbit): quỹ đạo địa tĩnh MEO (Medium Earth Orbit): quỹ đạo trung LEO (Low Earth Orbit): quỹ đạo thấp.

31p kiemphong232 14-11-2012 123 34   Download

When seen from space, “Planet Earth” is a mix of clouds, with the majority (two thirds) of the total surface under ocean water with the remaining third of land forming what we call continents, with various degrees of increasing albedo from open water bodies, vegetation, bare soil, rocks, deserts, and snow/ice packs. In a very short time (relative to Earth's age), the modern human civilization has conquered its neighboring space with probes, satellites, and vehicles carrying humans for exploration.

250p cucdai_1 16-10-2012 49 10   Download

The purpose of this document is to describe the functionality and performance parameters for each GEOSAR instrument. The document is intended to be used to ensure the necessary compatibility for the 406 MHz beacon to satellite uplink and compatibility for the satellite to geostationary local user terminal (GEOLUT) downlink. The document is not intended for use as a specification for procurement of hardware for GEOSAR satellite repeaters.

48p nhatkyvodanh 12-07-2012 128 5   Download

The first reference to satellite communication systems was made in the mid-1940s by Arthur Clarke [1]. In this paper, Clarke described a number of fundamental issues relating to the building of a satellite network that entirely covers the earth including issues related to spectrum use, the power needed to run the network and the way of bringing the satellites to orbit. Clarke also introduced the concept of geostationary satellites, which – as explained later – orbit the earth in a radius that allows them to appear stationary from the earth’s surface....

26p tienvovan 18-09-2010 71 4   Download

A low earth orbit (LEO) satellite constellation consists of a set of satellites orbiting the Earth with high constant speed at a relatively low altitude (a few thousand kilometers) [1]. Each satellite is equipped with a fixed number of antennas that allow it to communicate with ground transmitters/receivers and with other satellites. One of the major advantages of LEO satellites (as opposed to geostationary—GEO—satellites) is that they are closer to the Earth’s surface.

21p huggoo 20-08-2010 70 4   Download