Results 11 to 20 of about 869,960 (293)

DTN for LEO Satellite Communications

, 2011
Satellite communications are an interesting and promising application field for Delay/Disruption Tolerant Networking (DTN). Although primarily conceived for deep space communications and sensor networks, it was immediately recognized that DTN was applicable to satellite environments, in particular to cope with the intermittent channels typical of LEO ...
CAINI, CARLO, FIRRINCIELI, ROSARIO
openaire   +2 more sources

Multi-LEO Satellite Stereo Winds

Remote Sensing, 2023
The stereo-winds method follows trackable atmospheric cloud features from multiple viewing perspectives over multiple times, generally involving multiple satellite platforms. Multi-temporal observations provide information about the wind velocity and the observed parallax between viewing perspectives provides information about the height.
James L. Carr, Dong L. Wu, Mariel D. Friberg, Tyler C. Summers   +3 more
openaire   +4 more sources

Real-Time LEO Satellite Clocks Based on Near-Real-Time Clock Determination with Ultra-Short-Term Prediction

Remote Sensing
The utilization of Low Earth Orbit (LEO) satellites is anticipated to augment various aspects of traditional GNSS-based Positioning, Navigation, and Timing (PNT) services. While the LEO satellite orbital products can nowadays be produced with rather high
Meifang Wu, Kan Wang, Jinqian Wang, Jiawei Liu, Beixi Chen, Wei Xie, Zhe Zhang, Xuhai Yang   +7 more
doaj   +2 more sources

Effect of strong time-varying transmission distance on LEO satellite-terrestrial deliveries [PDF]

, 2022
In this paper, we investigate the effect of the strong time-varying transmission distance on the performance of the low-earth orbit (LEO) satellite-terrestrial transmission (STT) system.
Alouini, M -S., Mao, Y., Li, Tingting, Pan, G., Lv, Tiejun, Pan, Gaofeng, Li, T., Ma, Yuanyuan, Alouini, Mohamed-Slim, Lv, T., Chen, Yunfei, Gaofeng Pan, Yunfei Chen, Yuanyuan Ma, Tingting Li, Mohamed-Slim Alouini, Tiejun Lv   +16 more
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Downlink Cooperative MIMO in LEO Satellites [PDF]

IEEE Access, 2020
We consider a communication scheme in which two low earth orbit (LEO) satellites jointly transmit (at the same time and frequency) to a multi antenna land terminal (LT). This scheme can increase the achievable terminal throughput by up to a factor of 2, depending on the channel matrices.
Rei Richter, Itsik Bergel, Yair Noam, Ephraim Zehavi   +3 more
openaire   +2 more sources

On-Demand Routing in LEO Satellite Systems [PDF]

2007 IEEE International Conference on Communications, 2007
In this paper, a location-assisted on-demand routing (LAOR) protocol for low earth orbit (LEO) satellite systems is proposed and evaluated. This protocol can be viewed as a variant of the well-known ad-hoc on-demand distance vector (AODV) routing protocol, tailored to the requirements imposed by the characteristics of LEO satellite systems' topology ...
Karapantazis, S., Papapetrou, E., Pavlidou, F.-N   +2 more
openaire   +3 more sources

Trends in LEO Satellite Handover Algorithms [PDF]

2021 Twelfth International Conference on Ubiquitous and Future Networks (ICUFN), 2021
In this paper, we review well-known handovers algorithms in satellite environment. The modern research trends and contributions are proposed and summarized in order to overcome their considering problems in satellite-air-ground integrated network environment caused by the fast movement of Low Earth Orbit (LEO) satellite and related frequent handover ...
S.-K. Park, Joongheon Kim
openaire   +3 more sources

Efficient Content Caching for Delivery Time Minimization in the LEO Satellite Networks [PDF]

, 2023
peer reviewedNext-generation multi-spot beam satellite systems open a new way to design low earth orbit (LEO) satellite communication systems with full flexibility in managing bandwidth, transmit power, and spot beam coverage, enabling the adoption of ...
VU, Thang Xuan, OTTERSTEN, Björn, CHATZINOTAS, Symeon, BHANDARI, Sovit   +3 more
core   +1 more source

A Literature Review on Dynamic LEO Satellite Communication Network [PDF]

, 2022
To support the explosive growth of wireless devices and applications, various access techniques need to be developed for future wireless systems to provide reliable data services in vast areas. With recent significant advances in dynamic low Earth orbit (
Dr. K. Sagar
core   +1 more source

A new method to estimate GPS satellite and receiver differential code biases using a network of LEO satellites

, 2021
The differential code biases (DCBs) of the global positioning system (GPS) receiver onboard low-Earth orbit (LEO) satellites are commonly estimated by a local spherical symmetry assumption together with the known GPS satellite DCBs from ground-based ...
Jin, Shuanggen, Hoque, Mainul, Yuan, Liangliang; Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai, China, Jin, Shuanggen; School of Remote Sensing and Geomatics Engineering, Nanjing University of Information Science and Technology, Nanjing, China, Yuan, Liangliang, Hoque, Mainul; Institute of Solar-Terrestrial Physics, German Aerospace Center, Neustrelitz, Germany   +5 more
core   +1 more source