Abstract: In a process for informing a user regarding the position of an information source relative to the user's position, the position of an information source is first determined relative to the user. Thereafter, a tactile or electrical stimulus is generated, for directly affecting the user in a location that corresponds to the determined position of the information source. In one embodiment of the invention, tactile or electrical actuators are disposed at locations within a garment, such as a pilot's uniform at locations which correspond to possible locations of the information source.

Abstract: The invention relates to an apparatus for a regional or global navigation satellite system that includes an arrangement for receiving additional data or navigation messages from the navigation satellite system, and an arrangement for informing or alarming the user that critical atmospheric conditions occur, whereby the additional data or the navigation messages include atmospheric information.

Abstract: The invention includes a process for one's own global navigation satellite system and at least one other global navigation satellite system including the following: Receiving ranging signals and navigation messages or ranging signals only from the at least one other global navigation satellite system, and processing the received ranging signals and navigation messages in a similar way as the ranging signals and navigation messages of the owned global navigation satellite system.

Abstract: A process for improving continuity in a two-frequency navigation satellite system includes steps of i) observing the ionosphere by measurements in the two or more frequency bands; and ii) transmitting an alert message which informs user systems of a change of the ionosphere when at least one measurement indicates a change of the ionosphere that deviates from one or more predefined conditions.

Abstract: A process for optimizing status notifications in the navigation satellite system includes the following steps: the determination of information concerning a communication network of the navigation satellite system; and the transmission of the determined information as a status notification in at least one navigation message.

Abstract: In a method for relative time and position determinations for moving objects of a constellation, signals by the objects are isochronously transmitted, with each object transmitting a unique signal for that object. The received signals of each object of the constellation are transmitted to all other objects of the constellation after a predetermined waiting time.

Abstract: A satellite system for providing a navigation service includes a ground segment and a user segment. The ground segment provides information to enable the user segment to autonomously determine the user position performance.

Abstract: A device and method for orbit prediction of satellites are provided. An accelerometer measures non-gravity forces acting on a satellite. A processor receives measured non-gravity forces from the accelerometer, estimates the contributions of the measured non-gravity forces to the movement of the satellite, and predicts the orbit of the satellite based on the estimated contributions of the non-gravity forces to the movement of the satellite.

Abstract: In a method for adjusting the integrity alert threshold in a satellite navigation system, an alert message for a satellite is sent when an estimated signal error of the satellite signal emitted by the satellite is greater than a defined integrity alert threshold. According to the invention one or more parameters in a data stream emitted by the satellite are varied, and the integrity alert threshold is adjusted based on the changed parameters.

Abstract: In a method of improving the integrity communication in a satellite navigation system which comprises a space segment having multiple satellites which emit navigation signals for the reception and evaluation by use systems for position determination, and a ground segment having several observation stations which monitor the satellites, an error budget for different observation stations or groups of observations stations is transmitted with the navigation signal of a satellite. The navigation signal is received and an error budget contained therein is evaluated by computing a scalar value from the error budget. The scalar value indicates the precision of the error estimate for the generation of the navigation signal.

Abstract: A method for monitoring the integrity of satellite navigation system includes a first detection of integrity problems, in which the same entity of a navigation signal from a particular satellite is received at different sites, and evaluated to estimate the error of the entity and the error made during the error estimation process. In a second detection, navigation signals received from a specific satellite are measured and evaluated to estimate the error of the entity and the error in the error estimation process. Finally, in a third detection, several navigation signals from different satellites are measured, and evaluated to estimate the error of the entity and the error made in the error estimation process.

Abstract: A terminal for satellite navigation services includes a first receiver for receiving navigation messages emitted by satellites; an output interface for the output of navigation information; and an activating unit. In response to a command signal contained in a navigation message, the activating unit changes an operating condition of the terminal.

Abstract: A system and method for the efficient dissemination of information in a satellite navigation system is provided. The system includes a satellite system comprising a plurality of satellites, a network of observation stations for observing the signals of the satellites, one or more redundant central processing center(s) for evaluating the observations of the observation stations and for generating information, based on the observations, for the dissemination to utilization systems, and a communication network for transmitting the observations from the observation stations to the one or more redundant central processing center(s). The one or more redundant central processing center(s) send(s) the information to the selected satellites, and upon receiving the information, each of the selected satellites sends this information to the neighboring satellites.

Abstract: A radio signal-based positioning device includes a receiver that receives a plurality of radio-transmitted positioning signals, a frequency determiner that determines a frequency of each of the plurality of positioning signals, a send time determiner that determines a send time of each of the plurality of positioning signals, and an evaluation unit that determines a position location from the determined frequencies and send times of the plurality of positioning signals.

Abstract: A device of a supplementary navigation satellite is provided. The device includes a unit for generating navigation signals, the signal strength of the navigation signals being dimensioned in such a way that it is still possible to receive signals of other satellite navigation systems.

Abstract: Systems and methods for a navigation satellite of a satellite positioning supplementary system are provided in which a unit generates a navigation signal with a signal strength being dimensioned in such a way that it is still possible to receive signals of other satellite navigation systems.

Abstract: A positioning device for a satellite navigation system includes a receiver that receives atmospheric correction data and an evaluation unit that determines a position location and estimates its quality on the basis of a plurality of positioning signals, with inclusion of the atmospheric correction data.

Abstract: A method for providing and transmitting data in a data transmission system by transmitting several data blocks from a data-transmitting device to terminals. Before transmission of the data to the terminals an interleaving process of at least two data blocks is conducted. For the purpose of interleaving for each data unit of the data blocks, a transmission time is established with the help of an algorithm in such a way that for the transmission of k time critical data blocks with k=2, 3, 4, . . . and for one non-time critical data block, the transmission times of the data units of each time critical data block are respectively set at a fraction 1/k of the transmission time of the non-critical data block.

Abstract: In a method for providing integrity information for users of a global navigation system, which comprises several space vehicles like satellites transmitting information to a device for position detection, the transmitted information comprises first information from the global navigation system about the accuracy of a signal in space error SISE of a faulty space vehicle, and second information whether or not the global navigation system assesses the faulty space vehicle as faulty. The invention is based on the assumption how exact a fault can be detected, so that performance the global navigation system can be increased; and no unfounded assumption is used which improves the quality of service.

Abstract: A device for automatically controlling the speed of a vehicle comprises a positioning sensor, which is designed to emit a position signal with the current position of the vehicle, a navigation database, in which the positions of the city limits are stored, and a speed control unit, to which the position signal is fed. The speed control unit is configured such that it determines, as a function of the position signal, the distance of the vehicle from the nearest city limits or a region with a speed limit in the direction of travel of the vehicle, based on data of the navigation database. It then generates, as a function of the determined distance, a speed setting signal, which reduces the current speed of the vehicle in such a manner that a predefined speed of the vehicle is reached no later than at the nearest city limits or the region with a speed limit.