The global allocation of L-band, as well as the S-band spectrum, for mobile satellite services represents one of the major strengths for system design that can be utilised by the Inmarsat industry today. However, L-band is now about to be saturated with traffic, and there is a clear trend towards offering more bandwidth demanding services to mobile satellite terminals as well, including video, ...

ZY-1 02C satellite is a new Chinese civil remote sensing satellite launched on December 22, 2011. It is the highest resolution civil remote sensing satellite in China which carried panchromatic/multispectral sensor and high resolution sensor. Compared with image of SPOT5 satellite, the radiation quality of ZY-1 02C sensors data was evaluated. The result showed: the SNR of ZY-1 02C is higher tha...

This letter proposes an ultra-wideband switched T-type phase shifter, which covers the whole X/Ku band. The proposed shifter integrates a filter compensation structure, achieving flat relative shift in broadband, conventional one cannot acquire. In addition, designed can further reduce error and improve capability with greater than 45°. Employing architecture, 90° is fabricated 0.15-μm GaAs pHE...

We present the preliminary results of a survey that makes use of several deep exposures obtained with the X-Ray telescopes of the BeppoSAX satellite. The survey limiting sensitivity is 5× 10 erg cmsin the 2-10 keV band and 7 × 10 erg cmsin the harder 5-10 keV band. We find that the 2-10 keV LogN-LogS is consistent with that determined in ASCA surveys. The counts in the 5-10 keV band imply eithe...

TerraSAR-X is a versatile X-Band SAR satellite operating in Stripmap, Spotlight and ScanSAR modes with selectable or dual polarisation. Additionally, experimental modes are possible, like wide bandwidth operation providing even higher resolution, or a left-looking mode. Consequently, cost and time effective concepts for external calibration are mandatory because of the large number of modes and...

Taking into account the needs for improved, spatially detailed observations of snow and ice in climate research, hydrology, and glaciology, the satellite mission COld REgions Hydrology High-resolution Observatory, CoRe-H2O, was proposed to ESA. As payload a coand cross-polarized Ku-band (17.2 GHz) and X-band (9.6 GHz) SAR was selected, because of its sensitivity to dry snow, thin sea ice, and t...

This paper attempts to apply an adaptive network-based fuzzy inference system (ANFIS) for analysis of the resonant frequency of a single-layer single-patch microstrip rectangular patch antenna with two equal size slots which are placed on the patch in the form of parallel to resonance edges. The resonant frequency is calculated as the position of the slots is shifted from the right endpoint to ...

A dual frequency and dual circular polarisation multilayer microstrip antenna element for satellite communication is presented. The element is fed by a gap-coupled probe pin. The microstrip element exhibits a dual frequency band of operation for two orthogonal circular polarisations. A parametric study to optimise the element performance has been conducted. A prototype with dimensions that are ...

Emergency situations require reliable broadband communications systems which are able to transmit relevant information from the disaster site to the decision makers and send feedback to first responders regarding potential dangers or decisions. A key factor in designing a robust communications system with applications to emergency response is the development of a quick, easily deployable and mo...

This special issue of the Wiley International Journal of Satellite Communications and Networking hosts a selection of papers related to S-band mobile satellite R&D activities recently completed in the frame of the European Space Agency ARTES programs. The S-band allocation to hybrid satellite and terrestrial services in Europe 2009 and in other parts of the world has attracted operator, industr...