ASNARO (Advanced Satellite with New system ARchitecture for Observation) system outline including payload characteristics and bus architecture is presented in this paper. ASNARO, which is being developed by NEC and USEF under the contract with NEDO, is a LEO satellite for the earth observation by optical sensor in sub-meter class. The bus module of the ASNARO is highly adaptive for various miss...

“Minimizing path delay” is one of the challenges in low Earth orbit (LEO) satellite network routing algorithms. Many authors focus on propagation delays with the distance vector but ignore the status information and processing delays of inter-satellite links. For this purpose, a new discrete-time traffic and topology adaptive routing (DT-TTAR) algorithm is proposed in this paper. This routing a...

In order to combat shadowing and distance losses in a land mobile satellite system, an isdaptive power control (APC) scheme is essential. Such a scheme, implemented on the uplink, ensures that all users’ signals arrive at the base station with equal average power as they move within the satellite spot beam. Because of the lengthy round-trip delay on a satellite link, closed-loop power controll ...

current study basically aims at exploring the motives behind watching persian satellite channels among female audience in city of qaemshahr. participants are 263 female audiences from qaemshahr which were selected based on purposive sampling. the research method employed here is survey, and a researcher-developed questionnaire was used to collect data, one-sample t-test, anova, and friedman tes...

In this research the Preparation of Land use map of scanner LISS III satellite data, belonging to the IRS in the Aghche region in Isfahan province, is studied carefully. For this purpose, the IRS satellite images of August 2008 and various land preparation uses in region including rangelands, irrigation farming, dry farming, gardens and urban areas were separated and identified. Therefore, the ...

The collisional damping of satellite wakes at the edge of the Encke gap of Saturn's rings is studied using N-body simulations. The self-gravity of the ring particles is neglected. The wake damping rate is determined as a function of ring optical depth, particle size, and the coefficient of restitution of colliding particles. The amplitude decay of the wakes is nonuniform and is not a simple fun...

This paper deals with landslide hazard and risk analysis using Geographic Information System (GIS) and remote sensing data for Cameron Highland, Malaysia. Landslide locations were identified in the study area from interpretation of aerial photographs and field surveys. Topographical/geological data and satellite images were collected and processed using GIS and image processing tools. There are...

Quantum computing has a shorter history than satellites. From the engineering point of view, a quantum computing system may represent the highest level of information processing—a system where the physical layer is based on quantum mechanics. Although quantum computers are not to exist in the near future, the results of quantum computing are unquestionable: teleportation, O(n^1/2) search in an ...

Brown-headed gulls (Larus brunnicephalus), winter visitors of Thailand, were tracked by satellite telemetry during 2008-2011 for investigating their roles in the highly pathogenic avian influenza (HPAI) H5N1 virus spread. Eight gulls negative for influenza virus infection were marked with solar-powered satellite platform transmitters at Bang Poo study site in Samut Prakarn province, Thailand; t...