نتایج جستجو برای: satellite simulator
تعداد نتایج: 110847 فیلتر نتایج به سال:
This paper gives a survey of some of the issues involved in formation flight of satellites near a halo orbit. An example of the use of such a formation is to act as a telescope for imaging interesting astronomical objects, such as extra-solar planets. Issues such as formation establishment, stability and dynamics of the formation, control and reconfiguration, coverage analysis, and inter-satell...
this paper presents the design and simulation of a typical ka band satellite beacon receiver for propagation experimentation. using satellite beacon signal as a reference signal in satellite wave propagation study, is one of the most important methods. satellite beacons are frequently available for pointing large antennas, but such signals can be used for measuring the effect of natural phenome...
Contact operations of free-floating satellite robots are difficult and risky therefore, they must be thoroughly tested verified by ground-based facilities. A hardware-in-the-loop (HIL) simulation system with industrial is commonly used for simulating space robotic operations. However, a great challenge to handle divergence due intrinsic time delay between the measured forces driven reaction rob...
[1] To assess the current status of climate models in simulating clouds, basic cloud climatologies from ten atmospheric general circulation models are compared with satellite measurements from the International Satellite Cloud Climatology Project (ISCCP) and the Clouds and Earth’s Radiant Energy System (CERES) program. An ISCCP simulator is employed in all models to facilitate the comparison. M...
[1] Subpixel heterogeneity remains a key issue in the estimation of land parameters using satellite passive microwave sensors; the scales of spatial variability on land are typically much smaller than sensor footprints (tens of km). Disaggregation is a necessary component of any successful assimilation or retrieval scheme attempting to exploit satellite passive microwave observations to estimat...
The evaluation of dynamical ensemble forecast systems requires a solid validation of basic processes such as the global atmospheric water and energy cycle. The value of any validation approach strongly depends on the quality of the observational data records used. Current approaches utilize in situ measurements, remote sensing data and reanalyses. Related data records are subject to a number of...
QoSatAr: a cross-layer architecture for E2E QoS provisioning over DVB-S2 broadband satellite systems
This article presents QoSatAr, a cross-layer architecture developed to provide end-to-end quality of service (QoS) guarantees for Internet protocol (IP) traffic over the Digital Video Broadcasting-Second generation (DVB-S2) satellite systems. The architecture design is based on a cross-layer optimization between the physical layer and the network layer to provide QoS provisioning based on the b...
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