In this paper, a bandpass frequency selective surface filter has been suggested for the satellite and radar applications at X band regime. The study conducted both numerically experimentally in wide range between 2 GHz 14 GHz. of 3 dB bandwidth 7.3 9.3 obtained. proposed structure polarization insensitive characteristic. It also angular stability with incident angle ranges from 0° to 60° very s...

A three-dimensional ray tracing model with aiming algorithms for global positioning system (GPS) signal is proposed to make simulations conform to the realistic radio occultation (RO) signal propagation. The two aiming algorithms used in this study ensure the initial and end point ray trajectories are located in the prescribed region. In past studies, the ray tracing techniques applied to the R...

In the Earth Observation sensor web environment, the rapid, accurate, and unified discovery of diverse remote sensing satellite sensors, and their association to yield an integrated solution for a comprehensive response to specific emergency tasks pose considerable challenges. In this study, we propose a remote sensing satellite sensor object model, based on the object-oriented paradigm and the...

Space age, and with it the era of earth observation, is generally considered to have begun more than 50 years ago with the launch of Sputnik-1 on 4 October 1957 (Kramer, 2002). Sputnik’s beeping radio signals did not only serve to demonstrate the technological capabilities of the Soviet Union, they were also used to gather information about the electron density of the ionosphere. In legacy of S...

In this study, we explore the potential of open and accessible data in combination with interactive cloud-processing capabilities for applications in environmental monitoring and policies. During the last few years, the amount of open Earth observation and open national data has increased substantially. In parallel, access to analysis capabilities for such data has improved. The search and extr...

Intersatellite links or crosslinks provide direct connectivity between two or more satellites, thus eliminating the need for intermediate ground stations when sending data. Intersatellite links have been considered for satellite constellation missions involving earth observation and communications. Historically, a large satellite system has needed an extremely high financial budget. However, th...

X-Sat is a micro-satellite project with the objective to design, build, test and operate Singapore’s first domestic satellite. The mission’s main aim is to provide imaging capability for earth observation and environmental monitoring over Singapore and the South East Asian region with daily coverage and downlink of the acquired imagery within the same orbit. Secondary objectives are satellite-b...

In this paper, we address the problem of managing the new generation of agile Earth Observing Satellites. Whereas non-agile satellites such as Spot have only one degree of freedom for acquiring images, the new generation satellites have three, giving opportunities for a more efficient scheduling of observations. A counterpart of this advantage is that the scheduling of observations is made much...