Abstract: A peristaltic pump for conveying fluids includes a stator and a rotor supported therein. A flexible hose is integrated in the stator and the rotor includes radially arranged conveying elements which squeeze the hose over a section containing the fluid. The squeezed fluid section moves progressively in the hose under the effect of a motor connected to the rotor. The conveying elements are designed as rotatably mounted rollers that include at least two rolling bearings, of which the outer rings are connected via a common outer sleeve and of which the inner rings are connected to the rotor. Under the effect of the motor, the rotor moves in the stator and the outer rings of the conveying elements roll on the inner surface of the stator.

Abstract: Method of processing incoming calls in a communications terminal. The method includes determining whether a caller ID of the calling communications terminal is an admissible caller ID, determining whether a time at which the call is received from the other communication subscriber meets a predetermined time criterion, and signaling the call on the communications terminal when both the caller ID is admissible and the time criterion is met.

Abstract: A bubble trap is especially suitable for separating gas bubbles from liquid fuel supplied from a fuel tank in a spacecraft. The bubble trap includes a rotationally symmetrical collecting container forming a container wall, plural liquid guide vanes extending radially and longitudinally along the inside of the container wall, a perforated conical gas separator that tapers conically toward an outlet of the collecting container, and screens arranged between the gas separator and the outlet.

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: 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: A signal branch for use in a communication system, in particular in a reflector antenna, for the transmission of microwave signals is provided. The signal branch includes a common signal wave guide for transmitting a transmission signal and a received signal that has one first end and one second end as well as an exterior and interior. Moreover, a plurality of transmission signal wave guides is provided for feeding the transmission signal, with the transmission signal wave guides being disposed on the exterior of the common signal wave guide in a symmetrically distributed manner and each being communicatively connected to the common signal wave guide. A plurality of receiver signal wave guides is provided for transmitting the received signal, with the receiver signal wave guides being symmetrically adjacent to the second end of the common signal wave guide and each being communicatively connected to the common signal wave guide.

Abstract: A method and apparatus for measuring the amount of fuel aboard a spacecraft under weightless conditions utilize at least one orifice, at least one flow latch valve for the selection of an orifice to be used, and at least one control valve for releasing a stream of a pressurizing gas from at least one high-pressure tank in order to restore pressure in a fuel tank following a pressure reduction due to withdrawal of fuel. The amount of fuel remaining in the fuel tank is determined based on the time required to restore fuel tank pressure by a flow of gas from the high pressure tank to the fuel tank, via the orifice.

Abstract: Method and receiver synchronizing receiver with received ambiguous signal having at least two peaks. Method includes providing information about known transmitted signal having a number of at least two peaks, the information including number of peaks and distances between at least two peaks, determining ratios between peaks of known transmitted signal and assigning determined ratio value to each peak, and deducing theoretical auto-correlation function from known transmitted signal. Auto-correlation function has number of correlations corresponding to number of peaks in known transmitted signal and correlators of the auto-correlation function are provided in same distance and have the same relative ratio as peaks in known transmitted signal.

Abstract: A method of measuring a directional graph of a test antenna includes disposing a plurality of measuring probes relative to the test antenna, each being disposed at a different first predetermined height above a reference plane; disposing the test antenna at a second predetermined height above the reference plane; measuring transmission characteristics relative to the test antenna between each of the plurality of measuring probes and the test antenna; determining prevailing scatter characteristics of the reference plane; and determining the directional graph of the test antenna using the prevailing scatter characteristics.

Abstract: In a method for optimization of status messages in a satellite navigation system, which comprises a space segment having a plurality of satellites that emit navigation signals to be received and evaluated by utilization systems for position determination, and a ground segment having a plurality of observation stations that monitor the satellites, a threshold value is determined, as a function of location, for a message indicating that the error of a satellite is no longer acceptable.

Abstract: In a method for optimizing the accuracy of position determination, and/or for reducing the integrity risk, of a receiver in a global satellite navigation system having a plurality of satellites, for at least one satellite that is visible to the receiver (E), a deviation error (AF) is determined which is a function of the geometric orientation of the satellite relative to the receiver, and of at least one system parameter. The deviation error is determined based on an additional deviation error generated by an error projection into a coordinate system of the receiver. A first or a second value, whichever is smaller of the two, is used as the deviation error. The first value for the at least one system parameter is determined using a respective specified parameter value.

Abstract: A method for detecting frequency jumps of a navigation satellite's master clock, comprising the steps of i) monitoring the master clock signal that is generated by a master clock onboard of the satellite for a frequency jump, and ii) signaling a detected frequency jump of the master clock signal.

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 method and apparatus for wireless transmission of electrically complex or phase-critical signals includes a device for measuring the length of a transmission route to a moving platform, and a device for transmitting complex measuring or reference signals. According to the invention, components of the device for transmitting the signals are arranged adjacent components of the device for measuring the length of the transmission route, so that changes of the length of the transmission route are the same for both devices.

Abstract: A device and method for three-dimensional positioning are provided. The three-dimensional positioning of a common reference point is determined by fusion of supplied measurements, taking into account a lever arm compensation between the reference point, a global navigation satellite system (GNSS) receiver antenna, at least one radar antenna, and an inertial measuring unit.

Abstract: Method and system for tracking between two communications participants of an optical satellite communications system to provide a communication connection between the two communications participants. The method includes transmitting a signal from a first of the two communications participants to a second of the two communications participants, in which the second communications participant includes a detector arrangement with a plurality of detectors in a common receiving plane.

Abstract: Method, computer program to implement method, storage medium to store the program and apparatus for computing Signal-in-Space Accuracy (SISA) parameters in a regional or Global Navigation Satellite System (GNSS). The method includes at least of: determining individual Signal-in-Space Error (SISE) vectors; mapping individual SISE vectors to a service area; accumulating empirical sample sets; processing density functions of estimations of accumulated sample sets; individually overbounding density functions in one of an overbounding sense related to the regional or GNSS or in a paired overbounding with excess mass sense; and selecting a worst case according to predefined requirements.

Abstract: A method for resolving sub-carrier ambiguities of a total number of tracking channels of a binary offset carrier (BOC) navigation signal is provided. For a simultaneously considered subset of at least four tracking channels, a set of sub-carrier candidate ambiguities is determined based on the sub-carrier modulation. Position and receiver clock error are calculated for each possible combination of sub-carrier ambiguities. Predicted delays are calculated based on each calculated position and receiver clock error. Differences between the predicted delays and the delay candidates originating from each specific combination of subcarrier ambiguities are calculated. A residual is calculated based on the differences and the set of sub-carrier ambiguities and the corresponding position and receiver clock error leading to the smallest residual are selected.

Abstract: A plasma generator having a housing surrounding an ionization chamber, at least one working-fluid supply line leading into the ionization chamber, the ionization chamber having at least one outlet opening, at least one electric coil arrangement which surrounds at least one area of the ionization chamber, the coil arrangement being electrically connected with a high-frequency alternating-current source (AC) which is constructed such that it applies a high-frequency electric alternating current to at least one coil of the coil arrangement, is wherein a further current source (DC) is provided which is constructed such that it applies a direct voltage or an alternating voltage of a frequency lower than that of the voltage supplied by the high-frequency alternating current source (AC) to at least one coil of the coil arrangement.

Abstract: A system and method of calculating corrections to a navigation solution based on accurate data are provided. GNSS ephemeris, clock models and other navigation information are received from at least three GNSS satellites and pseudo-ranging to the GNSS satellites is performed. A PVT solution is resolved from the GNSS ephemeris, clock models, and other navigation information and the pseudo range measurements. The PVT solution includes a statistical measure. Differential GNSS data for calculating the corrections to the PVT solution is received and a corrected PVT solution is calculated based upon the differential GNSS data. The corrected PVT solution is compared to a region defined by the statistical measure and the corrected PVT solution is rejected when the corrected PVT solution is not within the region.