Results 251 to 260 of about 68,626 (291)

Satellite selection for multi-constellation

2008 IEEE/ION Position, Location and Navigation Symposium, 2008
There will be 70~90 navigation satellites operating at the same time when Glonass and Galileo reach full operation capability. As a result, the number of visible satellites can reach 30. Thus the positioning accuracy will be improved greatly. However, so many satellite measurements may burden the receiverpsilas processing element when to use them to ...
null Zhang Miaoyan, null Zhang Jun, null Qin Yong   +2 more
openaire   +1 more source

New Satellite Selection Approach for GPS/BDS/GLONASS Kinematic Precise Point Positioning

Applied Sciences (Switzerland), 2019
With the development of global satellite navigation systems, kinematic Precise Point Positioning (PPP) is facing the increasing computational load of instantaneous (single-epoch) processing due to more and more visible satellites.
Liu Yang, Jingxiang Gao, Zengke Li
exaly   +2 more sources

Fast Algorithm of Selecting Satellites for Multiple Satellite Integrated Navigation System

2009 WRI World Congress on Computer Science and Information Engineering, 2009
As complexity is the feature of the structure of constellation and numerous satellites of multiple satellite integrated navigation system, on some special occasions or during some unusual period, selecting and recombining of constellation and satellites should be completed quickly.
Xiaolei Yu, Yongrong Sun, Jianye Liu, Jianfeng Miao   +3 more
openaire   +1 more source

Satellite earth station (SeS) selection method for satellite-based sensor networks

IEEE Communications Letters, 2007
The reference network is composed of a group of wireless sensors directly in view of a cluster of satellite earth stations (CoSES), which convey the information coming from the sensors to a destination remote monitoring host (RMH). More than one satellite earth station (SES), all in this letter, within the cluster receive the information packets but to
BISIO, IGOR, MARCHESE, MARIO
openaire   +1 more source

Selective DF relaying for mobile satellite broadcasting

21st Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, 2010
This paper addresses mobile terminal (MT) relaying in order to improve the performance of mobile satellite broadcasting. It considers selective decode-and-forward (SDF) relaying with BICM-OFDM air interface. The BER upper bound was derived for the threshold-based SDF relaying in Rician fading channels.
Hui Luo, Yi Ma, Barry G. Evans
openaire   +1 more source

Resolution selective change detection in satellite images

2010 IEEE International Conference on Acoustics, Speech and Signal Processing, 2010
In this paper, we propose a novel method for unsupervised change detection in satellite images. A feature vector for each pixel is extracted using the multiresolution representation of the difference image which is computed from the multitemporal satellite images of the same scene acquired at different time instances.
Turgay Çelik 0001, Chandra V. Curtis
openaire   +1 more source

Satellite selection scheme for reducing handover attempts in LEO satellite communication systems

International Journal of Satellite Communications, 1998
Low earth orbit (LEO) satellite communication systems perform frequent intersatellite handovers for both fixed and mobile users. This paper proposes a satellite selection scheme for new/handover call requests when two or more satellites can be seen simultaneously. Each satellite in this scheme has a non-uniform transmitter antenna gain according to its
Young Hoon Kwon, Ji Young Yun, Dan Keun Sung   +2 more
openaire   +1 more source

Selection of GPS satellites for the optimum geometry

Chinese Astronomy and Astrophysics, 2004
In GPS applications, the position and clock error of the station can be obtained from observations of four visible satellites. The selection of the four satellites, or their geometrical configuration with respect to the station, affects directly the positioning accuracy.
Zheng Zuo-ya, Huang Cheng, Feng Chu-gang, Zhang Fei-peng   +3 more
openaire   +1 more source

Selection of satellite constellation framework of CAPS

Science in China Series G: Physics, Mechanics and Astronomy, 2009
Based on the idea of transmitting the satellite navigation and positioning system, taking the distribution and variation of the Position Dilution of Precision factor (PDOP), which is closely related with the precision of navigation and positioning, within the China area as the primary criterion, we analyze and discuss the tentative plan of ...
YanBen Han, LiHua Ma, QiYuan Qiao, ZhiQiang Yin, GuoXiang Ai   +4 more
openaire   +1 more source

Selected Features of the SEASAT Satellite

1986
This paper is meant to describe selected features of the SEASAT Satellite and gives further information on the sweep of imaging radar capability worldwide.
openaire   +1 more source