Method for radio camouflaging stationary objects

FIELD: radio engineering, communication.

SUBSTANCE: in the method for radio camouflaging stationary objects, which detects information signals from satellite navigation systems distributed in space, interfering signals are generated the main lobe of the beam pattern of the navigation receiver using jamming means oriented in space in the upper hemisphere and at a height H=tg(α)·D, where α is the angle between the edge of the main lobe of the beam pattern and the horizon; D is the distance from a separate specific jamming means to the navigation receiver, wherein the interfering signal is chirp modulated in a frequency band equal to the variation range of Doppler frequencies of the detected signal.

EFFECT: enabling active jamming in the main beam pattern of antenna systems of navigation receivers of high-precision weapons and unmanned aerial vehicles.

1 dwg

 

The invention relates to techniques for jamming navigation systems and communication systems for objects of weapons and military equipment.

There is a method of protecting strategic facility (see U.S. Pat. U.S. No. 3896439, IPC IPC: G018 7/38, NC 3/00, published. 22.07.1975), in which when registering reflected from the object signal, the interference signal is formed by modulating the received signal radar thermal noise, the source of which is an input amplifier, subsequent summation of the signals passed through the open switches of the key schemes in the adder and the gain in the output amplifier. To provide isolation between the input and output circuits and control detected by radar (RLS) is alternately Gating the input switch and the output UHF. If the input device receives signals not one station, and several, and each at its carrier frequency, that can be open simultaneously two or more frequency channels. This reduces the spectral power density of the interference in each of them, and thus decreases the efficiency of suppression of the radar. An additional feature of this device is the ability to simultaneously create and barrage jamming. In this case, the noise source, which is used as the input of the amplifier to which mutator can connect directly to the output amplifier. The device effectively creates interference airborne radar (radar), working in close frequencies (in one frequency channel). In the situation when the directivity of the antenna (BOTTOM) JV is several radar and they work on different frequencies /in different frequency channels, by increasing the width of the spectrum of the noise power density noise will be reduced. For example, if both are accepted radiation of two radars in different frequency channels, the power density of the interference posed by each of them, will be reduced in two times, and therefore, the range of suppression will decrease by 1.4 times.

There is a method of protecting fixed (strategic) objects from precision-guided weapons (WTO), equipped with a GPS receiver, by recording information signals from satellite navigation systems, distributed in space, the formation of interfering signal, the jamming signals from satellite navigation systems (SNS) (for example, "NAVSTAR") ground-based (see Ito and other Electronic warfare: radioactive and immunity, M., MAI. 1999, str-233).

The disadvantage of this method is to work in the lateral beamwidths of the antenna system navigation receiver. Also, a significant disadvantage is the possibility of quick direction-finding means p is stop interference on the ground and destroy them.

Therefore, jamming with the earth requires, as a minimum, increase the power of interfering signal by 15-20 dB.

Most existing designs WTO, NATO in control systems use information from the SNA "NAVSTAR", better known as GPS. The nomenclature of the WTO, using the information from the SNA includes: artillery projectiles of the type "Excalibur", a universal set of equipment for a free falling JDAM bombs, cruise missiles, all modifications, Intercontinental ballistic missiles (ICBMs) in conventional equipment, unmanned aerial vehicle (UAV) all modifications. The experience of recent local wars shows that the number of WTO, using the information from the SNA, is growing exponentially. The data types of the WTO have a significant advantage, namely: high accuracy, all-weather, simplified system management. However, this advantage is "the Achilles heel" of these types of WTO - effective suppression of signals from SNA turns WTO in conventional weapons with the appropriate for this type circular likely to reject.

More than two decades have passed since the creation of the operational control segment (OCS), including a Central control station (MCS) Shriver, Colorado (Schreiver AFB, Colorado) and observation stations around the world; the launch of the first GPS satellites. For this lie which have been designed built and launched several generations of satellites, the system will maintain the operational control segment. Today GPS is included in the new Millennium with far-reaching modernization program system both on earth and in space.

The U.S. Department of Defense (US DoD) was originally developed global positioning system (GPS) in the 70-ies only as a satellite navigation system for the solution of military problems. In the early 80's Federal Commission for radio and navigation planning conducted merging the development of the Ministry of Defense and Ministry of Transport (DoT) in the field of further conversion system in a global tool for positioning, navigation and timing (PNT - positioning, navigation, and timing). The presidential Directive of 1996 and regulations (National Defense Authorization Act for Fiscal Year 1998, Public Law 105-85, section 2281, November 18, 1997) require the U.S. government and the Ministry of Defence to provide services accurate positioning PPS (Precise Positioning Service) for military and other authorized users. Further, the policy provides for the development of measures aimed at preventing the use of a GPS system and after its modernization forces of the enemy, so that the US and allies maintained a military advantage without disrupting civil users of GPS

Satellite navigation system NAVSTAR" creates the navigation area, with a global coverage. For the destruction of the navigation field of the given system there are several possible approaches.

1. The destruction of the satellite constellation. For solving this task requires at least incapacitate 12 spacecraft SNA "NAVSTAR" for the destruction of the permanent global coverage system. The solution of this problem requires the output to 6 target orbits apparatus 12 interceptor, which is technically difficult and economically costly.

2. The destruction of the control points SNA "NAVSTAR". The solution to this problem will not give any tangible effect, as the latest group of spacecraft SNA "NAVSTAR" has a system of inter-satellite communication and correction of time scales and ephemeris, which allows satellite group to operate autonomously for at least 90 days.

3. Direct impact on navigation receiver (NP) SNA "NAVSTAR". The solution to this problem is jamming navigation receivers, which is the most technically simple and economical way of disabling navigation receivers. The disadvantage of this method is the local suppression of navigation fields SNA "NAVSTAR", depending on the power of jamming and their spatial location is relative to the receivers.

The technical task of the present invention is the formation of noise and interference signals from the upper hemisphere of precision weapons (affected object) to increase the effectiveness of electronic countermeasures (protection of strategic objects from precision-guided weapons, equipped with a GPS receiver, and survivability of the jammer).

To accomplish the technical tasks in the way radiometeric stationary objects, recording information signals from satellite navigation systems, distributed in space, the formation of interfering signal interfering signals is formed in the main beamwidths navigation receiver by means of jamming oriented in space in the upper hemisphere and bred to a height of

where α is the angle between the edge of the main lobe of the pattern and the horizon; D is the distance between the individual specific means of jamming to a navigation receiver, thus interfering signal modulate linearly on frequency law in the frequency range equal to the range of change of Doppler frequency detected signal.

Analysis of the WTO and UAV shows that the antenna system TM are arranged so that the main beamwidths was the direction of the satellites. Therefore, the jamming from the earth requires at least increase the power of interfering signal by 15-20 dB, to compensate for the work in the lateral beamwidths NP. For effective suppression of data NP must withdraw jamming on height (1), sufficient for the formation of interfering signal in the region of the main lobe of the antenna directional diagram of the navigation receiver. Interfering signal modulate linearly on frequency law in the frequency range equal to the range of Doppler frequencies.

For delivery of funds jamming at the desired height, you can use anti-aircraft guided missile (missile), and unguided rocket projectile reactive systems of volley fire (nurse shoes. Each rocket you need to install a few dozen tools jamming. To maintain the height you can use the gondola with helium or hydrogen, drop after separation from the rocket. This approach excretion will allow one to gulp cover a large area of strategic object.

The directional diagram of the antenna of the navigation receivers, typically has a width of 160 degrees.

Therefore, the interference in the main beamwidths, the height of funds jamming should be equal to:

H=tg(α)is D

where α is the angle between the edge of the main lobe of the pattern and the horizon; D is the distance from the jammer to the navigation receiver. The drawing shows the dependence of the height of the lifting means of jamming by the distance to the IRS.

Thus there is a complete disguise - increase technical efficiency ECM in a dueling situation.

How radiometeric stationary objects, by recording information signals from satellite navigation systems, distributed in space, with navigation receivers, the formation of interfering signal, characterized in that the interfering signals is formed in the main beamwidths navigation receiver by locating means of jamming in the space in the upper hemisphere and output to the height H=tg(α)·D, where α is the angle between the edge of the main lobe of the pattern and the horizon; D is the distance between the individual specific means of jamming to a navigation receiver, thus interfering signal modulate linearly on frequency law in the frequency range equal to the range of change of Doppler frequency detected signal.



 

Same patents:

FIELD: radio engineering, communication.

SUBSTANCE: in the existing method for functional striking of radioelectronic equipment, which involves probing the main lobe of an antenna beam pattern, operating frequency, operating threshold of a device for protecting the receiver from powerful pulse interference, the device for protecting the receiver of the jammed radioelectronic equipment from pulse interference is exposed, for which the jammed radioelectronic equipment is probed on the main lobe at operating frequency of the receiver with two pulse sequences - main and auxiliary, with the same repetition frequency with different duration, wherein the amplitude of the short pulses of the main sequence is set higher than the operating threshold of the device for protecting the receiver from powerful pulse interference, and the amplitude of the long pulses of the auxiliary sequence is set below the operating threshold of the device for protecting the receiver from powerful interference; reflected pulses from the input of the receiver, emitted back towards the antenna of the radioelectronic equipment, are picked up; the recovery time of the device for protecting the receiver from powerful pulse interference is determined as the difference in time between the end of the reflected short pulse of the main sequence and the reflected long pulse of the auxiliary sequence, after which the repetition period of the pulses of the main sequence (striking pulses) is set equal to the sum of the recovery time of the device for protection from interference pulses and the duration of reflected pulses of the main sequence, and emission of pulses of the auxiliary sequence is stopped.

EFFECT: high efficiency of striking radioelectronic equipment at operating range thereof by optimising the repetition period of pulse interference.

3 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention can be used to protect ground-based radar stations from attack by radiation target-seeking anti-radar missiles using additional radiation sources. In the existing method of protecting radar stations from anti-radar missiles based on two active additional radiation sources, radiation pulses of which lag behind a radio signal from the radar station, wherein the carrier frequency, duration, repetition period of noise signals and radar signal are equal, the additional radiation sources and the radar station are arranged on the same line at a distance of 50-150 m from each other, the additional radiation sources also perform delayed emission of radio signals relative the radio signal from the radar station, wherein delay of the radiation pulses of the additional sources is performed according to a random law in the range from 0 to τi, where τi is the duration of the radar pulse, the switching frequency of radiation moments of the additional radiation sources is selected equal to 0.5-1.5 Hz, and radar pulses are emitted with a delay of tld which is equal to the propagation time of the radar pulse in the link between the radar station and the additional radiation source tls and time equal to half the duration of the radar pulse tld=tls+τi2.

EFFECT: improved protection of a radar station from anti-radar missiles.

3 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to devices designed to simulate the frequency-time structure of a radar signal reflected from an underlying surface, from one or more targets, and can be used, for example, to simulate false targets and interference for protecting present targets and to simulate echo signals of radar sets and radar altimeters. Parameters of bright points of targets come from a separate external device. The invention enables to do without a multi-input adder of signals of bright points of targets and a set of modulators that are complex for implementation with a large number of bright points, especially during digital signal processing. Instead of an adder, the disclosed simulator has a synchroniser, one or two switches and a common modulator. In the version with two switches, only one common modulator is used instead of a set of modulators.

EFFECT: simple requirements for the simulator during both analogue and digital signal processing without considerable deterioration of quality of simulated target portraits when probing with primarily long signals.

FIELD: radio engineering, communication.

SUBSTANCE: object is protected from a missile using an aerosol cloud released by a missile, ejected by a release device towards the striking element over a given time.

EFFECT: high reliability of protection.

2 dwg

FIELD: radio engineering, communication.

SUBSTANCE: apparatus for distorting the radar image of an object consists of N-channel receiving and transmitting antenna arrays, a unit for inputting scattering cross-section values of the object, wherein each of the N channels consists of series-connected controlled phase changer, controlled amplifier and a transmitting antenna array component, each of the N channels also has a band-pass filter, first and second phase detectors, first and second analogue-to-digital converters, a computer, first, second and third digital-to-analogue converters, a mixer, as well as a reference generator, a phase changer and a memory device. Outputs of the memory device and the unit for inputting scattering cross-section values are respectively connected to the third and fourth inputs of computers of each channel; the output of the reference generator is connected to the second input of the first phase detector, the second input of the mixer and through the phase changer to the second inputs of the second phase detectors of each channel; wherein the n-th output, where n=1, 2, …, N, of the receiving antenna array is connected through a band-pass filter to the first inputs of the first and second phase detectors of the corresponding channel, the outputs of which are connected through corresponding analogue-to-digital converters to the first and second inputs of the computer of the corresponding channel, first, second and third outputs of which are connected to inputs of corresponding digital-to-analogue converters; the output of the second digital-to-analogue converter is connected to the first input of the mixer, the output of which is connected through the controlled phase changer to the first input of the controlled amplifier; the second input of the controlled phase changer is connected to the output of the third digital-to-analogue converter; the second input of the controlled amplifier is connected to the output of the first digital-to-analogue converter of that channel.

EFFECT: reducing the probability of correct detection of an object to a given average value.

3 dwg

FIELD: radio engineering, communication.

SUBSTANCE: apparatus for distorting the radar image of an object consists of N-channel receiving and transmitting antenna arrays, wherein each of the N channels contains a receiving antenna array component, series-connected controlled phase changer, controlled amplifier and a transmitting antenna array component, the apparatus being characterised by that each of the N channels includes a band-pass filter, first and second phase detectors, first and second analogue-to-digital converters, a computer, first, second and third digital-to-analogue converters a mixer, as well as a reference generator, a phase changer, first and second memory devices, a device for determining the direction of a radio source, a device for calculating the current scattering cross-section value of the object and a device for inputting information on the spatial position of the object, wherein outputs of the first memory device and the device for calculating the current scattering cross-section value of the object are respectively connected to the third and fourth inputs of computers of each channel; the output of the reference generator is connected to the second input of the first phase detector, the second input of the mixer and through the phase changer to the second inputs of the second phase detectors of each channel, wherein each n-th output, where n=1, 2, …, N, of the receiving antenna array is connected to the corresponding input of the device for determining the direction of a radio source and through the band-pass filter to the first inputs of the first and second phase detectors of the corresponding channel; the output of the device for determining the direction of a radio source is connected to the first input of the device for calculating the current scattering cross-section value of the object; outputs of the second memory device and the device for inputting information on the spatial position of the object are connected to the second and third inputs of the device for calculating the current scattering cross-section value of the object; outputs of the first and second phase detectors are connected through corresponding analogue-to-digital converters to corresponding inputs of the computer of the corresponding channel, the first, second and third outputs of which are connected to inputs of corresponding digital-to-analogue converters; the output of the second digital-to-analogue converter is connected to the first input of the mixer, the output of which is connected through the controlled phase changer to the first input of the controlled amplifier; the second input of the controlled phase changer is connected to output of the third digital-to-analogue converter; the second input of the controlled amplifier is connected to the output of the first digital-to-analogue converter of that channel.

EFFECT: ensuring the constant lowest probability of correct detection of an object Dcd for any conditions of generating radar images in a synthetic aperture antenna by distorting radar images of the object with relayed response.

4 dwg

FIELD: radio engineering, communication.

SUBSTANCE: radio signal received on a moving object from a radiating radar station is split into three components; the first component on a false Doppler frequency is phase-modulated by a slowly varying, for example, harmonic oscillation; the modulated first and second components are phase-shifted by balanced modulation; the shift value is selected equal to δ, |δ±ωpr|, respectively, where δ satisfies the inequality (k1)ωpr2+Δωδkωpr2Δω (k=1,2,3,4, Δω is the bandwidth of the radar station at a first intermediate frequency). To eliminate stable zeros of direction-finding characteristics of radar stations, one of said components is further phase-modulated by meander from 0 to 180 degrees. High probability of disrupting is achieved by deviation on velocity and modulation of the third component on the phase narrowband noise.

EFFECT: high probability of disrupting tracking of the goniometric coordinator of a radar station with a wide range of variation of parameters of interfering signals.

3 dwg

FIELD: radio engineering, communications.

SUBSTANCE: in the available method of functional destruction of radio electronic means (in this case a radio electronic station (RS) with a phased antenna array), including detection of RS signals, detection of direction of their arrival and radiation of powerful electromagnetic pulses in this direction, previously using a station of radio intelligence, they measure a period T of suppressed RS pulses tracking, distance to it B, and with account of these parameters they radiate powerful electromagnetic pulses in direction of the RS with a delay of each pulse relative to the pulse arrival from the RS, and these pulses are used to impact semiconductor circuits of control of phase changes of the phased antenna array, the functional destruction of the RS is carried out, operation of the RS is monitored, and if signals are not available, efficiency of destruction is estimated.

EFFECT: functional destruction of a radar station with a phased antenna array at distance of its action.

1 dwg

FIELD: radio engineering, communications.

SUBSTANCE: radio signals received on a moving object from a radiating radar are modulated by phase on shifted Doppler frequency by serrated oscillation with index 2 kπ (k=1, 2…) and frequency fM, exceeding the range of Doppler frequencies, the modulated signals are divided into three components - a central one and two peripheral, the central component is modulated by phase with serrated oscillation and the same frequency fm, but with the opposite inclination of the saw, peripheral components are phase-modulated with serrated oscillations with the same opposite inclination of the saw, but with frequencies fM+|Δf1| and fM-|Δf2|, where |Δf1,2|<<fM, the modulated central and peripheral components are summed by the double-channel system, one of two produced summary radio signals is shifted by phase by 180 degrees, and in turns both signals are radiated from spatially distanced points of the object, the frequency of radiated signals switching is carried out as exceeding the pass band of the radar selector. To increase trend towards tracking loss, drifting is carried out by speed, as well as phase modulation with narrow-band noise at frequency of received signal.

EFFECT: increased efficiency of radio countermeasures.

6 dwg

FIELD: physics.

SUBSTANCE: method of forming feigned column of moving equipment during radar observation involves selection of a false path for movement of objects on which n fixed object movement imitators are installed; the distance between the first and last objects is selected based on the speed of the objects in the column and movement of the column is imitated through successive switching of the fixed object movement imitators with frequency

EFFECT: imitation of feigned column of moving equipment during radar observation.

FIELD: physics, navigation.

SUBSTANCE: invention relates to satellite radio navigation systems. Said technical result is achieved by determining: a maintained position at a given moment, a maintained safe radius associated with the maintained position, the best position at the given moment, wherein the best position is: when data coming from an intermediate positioning device are available, the position associated with the best safe radius, wherein the best safe radius is selected by comparing, depending on a predefined selection criterion, an intermediate safe radius with the maintained safe radius, and when data coming from the intermediate positioning device are unavailable, the maintained position.

EFFECT: obtaining high-quality position data from the perspective of safe radius and availability, continuity of monitoring accuracy of the provided data.

7 cl, 2 dwg

FIELD: information technology.

SUBSTANCE: method is realised by a hybridisation device comprising a bank of Kalman filters, each working out a hybrid navigation solution from inertial measurements calculated by a virtual platform and raw measurements of signals emitted by a constellation of satellites supplied by a satellite-positioning system (GNSS), and comprises steps of: determination for each satellite of at least one probability ratio between a hypothetical breakdown of given type of the satellite and a hypothetical absence of breakdown of the satellite, declaration of a breakdown of given type on a satellite based on the probability ratio associated with this breakdown and of a threshold value, estimation of the impact of the breakdown declared on each hybrid navigation solution, and correction of hybrid navigation solutions according to the estimation of the impact of the breakdown declared.

EFFECT: determining the type of breakdown.

14 cl, 3 dwg

FIELD: radio engineering, communication.

SUBSTANCE: compound navigation method combines satellite and radar ranging navigation techniques based on ground-based beacons, wherein satellite signals are received both on-board the aircraft and at the row of ground-based beacons, including at ground-based beacons at the landing strip. The ground-based beacons constantly refine base coordinates, determine differential corrections to coordinates and differential corrections to pseudo-ranges, generate a packet of correcting information with said differential corrections, errors in determination thereof, calculated tropospheric refraction data and the refined base coordinates of the ground-based beacons. Based on a request from an aircraft, the ground-based beacon emits, through a distance measurement channel, a signal with correcting information which includes differential corrections only in form of differential corrections to coordinates. The aircraft calculates navigation parameters taking into account correcting information, performs compound data processing and continuous comparative estimation of errors. Upon reaching the aerodrome area and landing, if the error value according to the satellite technique is less, the mode of generating a sequence of request ranging signals of the row of ground-based beacons is switched to a mode for requesting only one ground-based beacon located at the landing strip, wherein on the aircraft, differential corrections in the correcting information are transmitted only in form of differential corrections to pseudo-ranges. Refined coordinates of the aircraft are calculated from the corrected pseudo-ranges.

EFFECT: high reliability and accuracy of determining aircraft coordinates.

9 cl, 2 dwg, 2 app

FIELD: radio engineering, communication.

SUBSTANCE: three-dimensional positioning apparatus (10) with a secondary radar base station (12), designed to measure range to repeaters (14) and has at least one radar antenna (16), has a GNSS receiver (18), designed to measure GNSS signals and has a GNSS receiving antenna (20), an inertial measuring unit (22), designed to determine the position of the GNSS receiving antenna, as well as at least one radar antenna in a common coordinate system relative a zero point, and an integrating processor (24, 30, 31), to which are transmitted psedorange measurements of the GNSS receiver, radar range measurements, and movements of the apparatus relative the axis of the common coordinate system measured by the inertial measuring unit (22), and which determines the three-dimensional position of the common reference point by combining the measurements and data, and arm compensation is carried out based on the measured movements.

EFFECT: high accuracy of positioning.

13 cl, 4 dwg

FIELD: radio engineering, communication.

SUBSTANCE: method comprises the following steps of correcting predictions of a parameter included in a received and time-variable signal: estimation of the prediction error based on a first set of values estimated during a determined time period by comparing these values with values previously predicted for the same determined time period; analysis of the predicted time series of prediction errors by a method of processing the signal and isolating the contributions of the systematic effects, extrapolation of the behaviour of the contributions of the systematic effects during the time period concerned and correction of the predictions using the duly extrapolated values.

EFFECT: correcting prediction of values of time-variable signals subjected to interference by various uncontrollable systematic effects without limitations to existing solutions.

3 cl, 3 dwg

FIELD: radio engineering, communication.

SUBSTANCE: system includes receiving stations (4) for receiving signals transmitted from the spacecraft (6) and a processing station (2) for receiving data from the receiving stations (4), where each receiving station (4) records, during a recording window (8), signals transmitted from the spacecraft (6) and transmits, to the processing station (2), data representing the recorded signals. The recording windows (8) associated with each of the receiving stations (4) are offset and/or have different size with respect to each other. The processing station (2) correlates the recorded signals to estimate the distance difference between the spacecraft (6) and each of a plurality of receiving stations and to estimate the spacecraft (6) position.

EFFECT: avoiding the need to send a reference signal pattern, emission by the spacecraft of any trigger sequence and the need to adapt the spacecraft, and improved estimation of the position of the spacecraft.

22 cl, 10 dwg, 1 tbl

FIELD: radio engineering, communication.

SUBSTANCE: indoor installation transmitter (200-1) is capable of providing position information using a second positioning signal which is compatible with the first positioning signal, which is a spread spectrum signal from each of a plurality of satellites. The indoor installation transmitter (200-1) has EEPROM (243) memory which stores position data for identification of the installation position thereof, FPGA (245) for generating a second signal, which includes position data in form of a spread spectrum signal and a transmitting unit (251-258) for transmitting a spread spectrum signal. The second positioning signal is generated to repeat the same content in a cycle which is shorter than for the first positioning signal.

EFFECT: providing position information without deterioration of accuracy even in a position where it is impossible to receive radio waves from a satellite which emits positioning signals, and shorter time required to obtain position information.

10 cl, 26 dwg

FIELD: radio engineering, communication.

SUBSTANCE: measurement error is detected using statistical estimation based on calculation of residual measurements, which particularly enables, independent of any ground segment (i.e. using a RAIM function), to increase efficiency of the available receiver (designated as "primary") without an integrity monitoring function, detect possible errors which distort input measurements for position calculation owing to use of a robust statistical estimation algorithm, i.e. an algorithm which is not susceptible to measurement errors, and with use of a dynamic criterion, and calculate a robust position adjustment provided by the primary receiver, with exclusion of any such detected error.

EFFECT: protecting a user of a radio navigation receiver from aberrational pseudodistance measurements.

16 cl, 1 dwg

FIELD: radio engineering, communication.

SUBSTANCE: in order to estimate an indication (11) of integrity of the system with respect to location errors (2) of very low probability, lower than or equal to about 10-7, the following steps are carried out in real time: measurement of data calculated by the system; calculation of a model of distribution H of location calculation errors (2) of the system; determination of parameters characterising the distribution model (H); modelling, in the probability domain, of the tail of the distribution H(x) by a calculation means as a function of said parameters applied to the extreme values theory; comparison in real time of the distribution of location errors with a tolerance threshold for providing an indication of integrity; and transmission in real time of the indication (11) of integrity of the system.

EFFECT: solving problems of estimating integrity margin of a satellite navigation system for malfunction events of very low probability.

7 cl, 3 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention can be used to determine reference location of a base station in a differential global navigation satellite system (GNSS). The base station includes a storage device, a logic controller and a GNSS receiver. Stored reference locations are stored in the storage device in form of sets of coordinates; the GNSS receiver determines the current estimate location of the base station in form of a set of coordinates having components. The logic controller reads the stored reference location and converts components of the stored reference location and components of the current estimate location into a binary string format, after which matching of the current estimate location with the stored reference location is established by establishing matching of the binary string component corresponding to the current estimate location with binary string components corresponding to the stored reference location. If it is established that the stored reference location matches the current estimate location, the stored location is considered the reference location of the base station.

EFFECT: determining the reference location of a base station with high accuracy.

15 cl, 6 dwg

FIELD: physics.

SUBSTANCE: network element (M) for generating backup data has a control element (M.1) for generating back up data relating to one or more base stations (S1, S2) of at least one navigation system, and a transmitting element (M.3.1) for transmitting back up data over a communication network (P) to a device (R). The positioning device (R) has a positioning receiver (R3) for positioning based on one or more signals transmitted by base stations (S1, S2) over at least one of the said satellite navigation systems; a receiver (R.2.2) for receiving back up data relating to at least one navigation system from the network element (M); and an analysis element (R.1.1) adapted for analysing the received back up data in order to detect information relating to the status of the said one or more signals from the base stations (S1, S2) of the navigation system. The said information relating to the status of the said one or more signals from the base stations (S1, S2) contain indicators to the base station (S1, S2) to which the signal relates, and the said status, which indicates suitability of the signal for using. The device (R) is adapted such that, the signal indicated as unsuitable for use is not used for positioning.

EFFECT: increased accuracy of determining location by providing the positioning device with a list of defective signals transmitted by a specific satellite.

29 cl, 6 dwg, 5 tbl

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