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Demonstrations of quantum key distribution (QKD) [1] with moving platforms are important to prove the viability of future satellite implementations. Thus far these demonstrations of QKD to aircraft have operated exclusively in the downlink configuration [2, 3], where the quantum source and transmitter are placed on the airborne platform. While this approach has the potential for higher key rates,...
Advanced Receiver Autonomous Integrity Monitoring (ARAIM) is a new Aircraft Based Augmentation System (ABAS) technique, firstly presented in the two reports of the GNSS Evolutionary Architecture Study (GEAS). The ARAIM technique offers the opportunity to enable GNSS receivers to serve as a primary means of navigation, worldwide, for precision approach down to LPV-200 operation, while at the same time...
The next generation aeronautical navigation system utilizes the Global navigation satellite system (GNSS) based equipment to aid aircrafts during approaching and landing. The Ground-based augmentation system (GBAS) broadcasts the augmentation information to the aircrafts in order to compensate for the GNSS signal-in-space errors and provides the accuracy, integrity, continuity and availability of...
The development of new GNSS constellations, and the modernization of existing ones, has increased the availability and the number of satellites-in-view, paving the way for new navigation algorithms and techniques. These offer the opportunity to improve the navigation performance while at the same time potentially reducing the support which has to be provided by Ground and Satellite Based Augmented...
In this paper we analyze and discuss the impact of ionospheric scintillations and multipath on the availability of the current single-frequency single-constellation Ground Based Augmentation System (GBAS). Scintillation effects, which usually occur around plasma bubbles, cause the receiver to lose lock of one or more satellites, leading to potentially unfavorable satellite geometries for an airborne...
The integration of Global Navigation Satellite System (GNSS) integrity augmentation functionalities in Unmanned Aerial Systems (UAS) has the potential to provide an integrity-augmented Sense-and-Avoid (SAA) solution suitable for cooperative and non-cooperative scenarios. In this paper, we evaluate the opportunities offered by this integration, proposing a novel approach that maximizes the synergies...
Technological achievements and cutting-edge methods in the last few decades, lead to a new era for aircraft approach and landing systems in parallel. Terrestrial radio-navigation systems used for takeoff, en-route navigation and landing of civilian and military planes in the world, such as VHF omni-directional range, instrument landing systems (ILS), etc. will be modernized with new systems using...
Ground-Based Augmentation System (GBAS) augments the performance of Global Navigation Satellite Systems (GNSS) for civil aviation by providing differential corrections to the position of an aircraft during takeoff and landing. GBAS provides continuous and integral positioning service in all weather operations even in zero visibility conditions to enable precision approach up to Category III. The gradients...
Satellite communication with its world-wide coverage has now become an indispensable part of the Aeronautical communication. Support for high-speed Internet access by the new generation satellite systems has made the provision of IP-based multimedia applications on-board the aircraft possible at all times. Considering the expensive nature of satellite resources, IP multicast can provide a cost-effective...
Demands on security, safety, and environmental protection in worldwide shipping is steadily increasing. Shipboard broadcast transponders based on the automatic identification system (AIS) can be easily detected close to coast or waterway areas. Satellite-based AIS receivers detect globally but are limited in high density traffic areas. In this paper, a new possibility for worldwide AIS detection via...
During flight trials over sea and land, AIS signals were recorded by an aircraft in flight level 280 up to 330, which represents the higher altitudes between 8500m and 10000m. These stored data were post-processed and analyzed. Within this paper, the approach of data's post-processing is described, the experienced characteristics to be handled, and challenges faced by the nature of overlapping AIS...
Local Area Augmentation System (LAAS) is basically designed by USA, to support aircraft precision approach and landing in poor visibility conditions. LAAS is still in conceptual stage in India. As LAAS is meant for safety-of-life systems, it must meet stringent requirement of achieving adequate service availability. LAAS availability varies with time and number of satellites in GPS constellation....
The paper presents a concept and the first experimental results of a complex navigation signal generator (CNSG). The generator forms a signal of a predefined radio-navigation beacon received at a specific aircraft position. Recently the beacon is represented by a GNSS satellite and its movement is incorporated. The CNSG consists of the two main parts. The first is the DSP part which physically generates...
Alexander Steingass received his engineer diploma in electrical engineering and communications at the University Ulm, Germany, in 1996. In 1997 he joined DLR. Since then he works in the field of satellite navigation. He was involved in the early GALILEO signal design and performance analysis. He received his Phd. 2002 at the University of Essen/Germany. Since then he was involved in multipath measurements...
With increasing utilization of satellite mobile services capacity shortage in respectively common frequency bands (L band) is to be expected. To enhance understanding of propagation channel characteristics at higher frequency bands (Ku/Ka band) an experiment with a mobile receiver, using narrow- and wideband test signals has been carried out. An airborne test platform has allowed to consider real...
GPS receiver is widely integrated into the autopilot for Small Unmanned Aircraft Vehicle (SUAV). The flight control loop within the autopilot uses the position and velocity information provided by GPS receiver to control the SUVA to flight through the desired path. So for tightly tracking a desired flight path, it is essential that GPS receiver can provide precise-enough position and velocity information...
Airports Authority of India (AAI) in collaboration with Indian Space Research Organization (ISRO) has planned to demonstrate Wide Area Differential GPS (WADGPS), over the Indian Flight Information Region for civil aviation application purpose. In GAGAN-TDS (GPS Aided Geo Augmented Navigation-Technology Demonstration System), with a configuration of eight Reference Stations, one Indian Master Control...
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