Abstract: A diagnostic circuit is provided that diagnoses a connection state of a capacitor connected to an output terminal of a regulator that outputs a first voltage, the diagnostic circuit including: a switching circuit that performs, during a first period, a switching control process of switching an output voltage of the regulator to a second voltage that is higher than the first voltage; a detecting circuit that detects a variation in an output current of the regulator caused by the switching control process; and a determining circuit that determines the connection state of the capacitor, based on a detection result of the detecting circuit.

Abstract: An apparatus and method for testing a circuit board included in a battery management system. The circuit board includes a first test point connected in common to one end of a first resistor, one end of a first capacitor and one end of a second resistor; a second test point connected in common to the other end of the second resistor and one end of a second capacitor; a third test point connected to the other end of the first resistor; and a fourth test point connected in common to the other end of the first capacitor and the other end of the second capacitor. The apparatus determines an open-circuit fault of at least one of the first capacitor and the second capacitor based on a first diagnosis voltage between the first and fourth test points and a second diagnosis voltage between the second and fourth test points.

Abstract: Apparatuses and methods for sending and receiving rotation speed information and corresponding computer programs and electronically readable data carriers are provided. A current interface is configured to transmit pulse sequences coding a number of bits. In a first bit group of the number of bits, it is flagged whether the pulse sequence has been sent for a zero crossing in a magnetic field. Information modulated onto a second bit group of the number of bits is selected on the basis of the first bit group.

Abstract: A magnetic sensor comprising: an application specific integrated circuit (ASIC); an insulating protective film formed on a surface of the ASIC; a substrate film formed on the insulating protective film; and a magnetic field detection element formed on the substrate film, the magnetic field detection element including two magnetic wires on the substrate film, a detection coil surrounding the two magnetic wires, two electrodes coupled to the two magnetic wires for wire energization, and two electrodes coupled to the coil for coil voltage detection.

Abstract: A magnetometer can include a single, integrated, unitary structure that has a gas cell defining a cavity having a vapor or vaporizable material disposed therein, a collimating element coupled to the gas cell and configured for collimating light directed toward the gas cell, and a lens element coupled the gas cell and configured for redirecting at least a portion of light that has passed through the gas cell. Additionally or alternatively, a gas cell of a magnetometer may be made of sapphire.

Abstract: A magnetic detection element includes an element part and a metal film. The element part is arranged on a surface of a substrate, and has linear portions arranged in parallel with each other and connecting portions connecting the linear portions in a meandering shape. The metal film has a first layered portion stacked on a turn portion of the element part defined by the connecting portion and a connection between the connecting portion and the linear portion, and a second layered portion formed integrally with the first layered portion to entirely cover a region of the surface surrounded by an internal end of the turn portion. The first layered portion has a peripheral side disposed between the internal end and an external end of the turn portion so as to expose an outer periphery of the turn portion.

Abstract: A sensor comprising: a first magnetoresistive (MR) bridge having a first stray field sensitivity; a second MR bridge having a second stray field sensitivity; and a driver circuitry configured to: (i) supply a first voltage to the first MR bridge, and (ii) supply a second voltage to the second MR bridge that is different from the first voltage, wherein supplying the first voltage and the second voltage to the first MR bridge and the second MR bridge, respectively, causes the first stray field sensitivity to match the second stray field sensitivity.

Abstract: Method and apparatus for hardware coil compression is disclosed. The coils in an array configured for the same region of interest are grouped into sub-arrays. The coils of each sub-array are pre-combined with a hardware combiner before further processing. The pre-combination converter composed of the pre-combiners is flexible, i.e., applicable to for example non-cylindrical coils; simpler than direct implementation of the software compression algorithm; and commercially feasible.

Abstract: Techniques are disclosed for acquiring magnetic resonance data of an object with a magnetic resonance imaging apparatus. A slice group is imaged whose slices define a contiguous imaging volume and which contains a first number of slices. In a number of concatenations, the magnetic resonance data for subgroups of the slices, each containing a respective second number of slices depending on the first number of concatenations, are acquired, and shimming is performed to increase field homogeneity in the imaging volume. To define the subgroups, the imaging volume is subdivided into at least two disjoint contiguous sub-volumes, and at least two subgroups are defined for each sub-volume, each subgroup only containing non-adjacent slices in the sub-volume. During acquisition of the magnetic resonance data of each subgroup, shimming is at least restricted to the respective sub-volume.

Abstract: A system and method for simultaneous multi-slice nuclear spin tomography is provided which requires no sensitivity profile of a receiving coil along a slice axis. A pulse space region to be sampled can be specified. A first pulse space dimension (ky) can be assigned to a first phase-encoded axis and a second pulse space dimension (kz) can be assigned to a second phase-encoded axis and the second phase-encoded axis corresponds to the slice axis. A sampling scheme can also be specified, and a complete sampled can be provided along the second pulse space dimension (kz). A magnetic resonance scan can then be carried out within the pulse space region to be sampled based on the sampling scheme and respective phase-encodings of the first and second phase-encoded axis.

Abstract: A method of designing a pulse sequence for parallel-transmission MRI includes a) for each one of a plurality of subjects, estimating a linear adjustment transformation (L), converting amplitude maps of RF fields generated by respective transmit channels of a MRI apparatus into respective standardized maps; and b) determining RF waveforms (P) minimizing a discrepancy between subject-specific distributions of flip-angles of nuclear spin and a target distribution, averaged over said subjects, the subject-specific distributions corresponding to the flip-angle distributions achieved by applying a superposition of RF fields, each having a temporal profile described by one of said RF waveforms and a spatial amplitude distribution described by a respective standardized map determined for the subject. A method and an apparatus for performing parallel-transmission MRI using such a pulse sequence are provided.

Abstract: According to one embodiment, a magnetic resonance imaging apparatus includes processing circuitry. The processing circuitry is configured to apply a filter to each of a first real-part image and a first imaginary-part image of a first complex image generated based on acquired magnetic resonance data and thereby generate a second complex image that includes a second real-part image and a second imaginary-part image. The processing circuitry is configured to generate a phase image denoised by the filter, the denoised phase image generated based on the second real-part image and the second imaginary-part image. The processing circuitry is configured to generate an intensity image related to an absolute value of the first complex image based on pixel values of the denoised phase image, the first real-part image, and the first imaginary-part image.

Abstract: Provided are a method, an apparatus and a device for detecting abnormity of an energy metering chip. The method includes: inputting a target self-test signal to a to-be-tested component of a target energy metering chip in response to the target energy metering chip beginning to run under driving of a power signal; acquiring a first output signal from an output terminal of the to-be-tested component, and inputting the first output signal to a notch filter; inputting a second output signal from an output terminal of the notch filter to a signal correlator, and acquiring a third output signal from an output terminal of the signal correlator; and detecting a running state of the to-be-tested component based on the third output signal, to determine whether the target energy metering chip is abnormal.

Abstract: A system and method for determining a position or a movable device is disclosed. The present system utilizes a movable device equipped with a locator device that has an antenna array such that it may determine the angle of arrival of a plurality of incoming beacon signals. In certain embodiments, the movable device is also able to measure its distance travelled. By knowing its distance moved and the angle of arrival from each beacon, the locator device is able to calculate its position as well as the position of each beacon. This procedure may be executed at regular intervals so that the movable device accurately determines its position.

Abstract: A method and apparatus for a co-located Radio Frequency Identification (RFID) device and ultrasonic device includes an RFID reader loop antenna element oriented parallel to a reflector panel. An ultrasonic emitter is disposed through an aperture in the reflector panel with a horn that extends through the loop element. The horn can serve as a mounting structure for the antenna element. A diameter of the aperture is less than one-quarter wavelength of an operating frequency of the RFID reader loop antenna element. The aperture is located in the reflector panel near a minimum E-field area of the RFID reader loop antenna element.

Abstract: A positioning apparatus comprises an acquiring section which acquires an azimuth angle and an angular velocity of a moving object from values measured by sensors of the moving object moving in a positioning area; a storage section which stores a coefficient of a relational expression established between a moving speed and a standard deviation of the angular velocity of the moving object in association with each of a plurality of division areas for dividing the positioning area; and a positioning section which specifies a division area where the moving object is positioned per unit time to acquire the stored coefficient in association with the division area, and calculates the moving speed in the division area from the coefficient and the standard deviation of the acquired angular velocity to measure a position of the moving object in the positioning area from the moving speed and the acquired azimuth angle.

Abstract: A method for operating a sensor arrangement in a motor vehicle on the basis of a DSI protocol is disclosed. The sensor arrangement has a central unit as a master and a plurality of sensor units, each having a receiver as slaves controlled by the master. The central unit and the sensor units are connected to a bus line and via the bus cable a communication takes place between the central unit and the sensor units. The method includes selecting a first group of sensor units by the central unit for a first measurement, assigning a first time slot or first time slots within a first cycle respectively to one of the sensor units from the first group by means of the central unit, and broadcasting corresponding first time slot information from the central unit to the sensor units.

Abstract: A system and method to eliminate false detections in a radar system involve arranging an array of antenna elements into two or more sub-arrays with a spacing between adjacent ones of the antenna elements of one of the two or more sub-arrays being different than a spacing between adjacent ones of the antenna elements of at least one other of the two or more sub-arrays. The method includes receiving reflected signals at the two or more sub-arrays resulting from transmitting transmit signals from the antenna elements of the two or more sub-arrays, and processing the reflected signals to distinguish an actual angle from the radar system to an object that contributed to the reflected signals from ambiguous angles at which the false detections of the object are obtained. A location of the object is determined as a result of the processing.

Abstract: A radar device is provided that includes a timing control component operable to generate, for each chirp of a sequence of chirps according to a set of chirp configuration parameters and a chirp profile for the chirp, chirp control signals to cause the radar device to transmit the chirp, the timing control component having chirp configuration parameter inputs, chirp profile parameter inputs, a chirp address output, and chirp control signal outputs, a chirp configuration storage component having chirp configuration parameter outputs coupled to corresponding inputs of the configuration parameter inputs of the timing control component, a chirp profile address output, and a chirp address input coupled to the chirp address output, and a chirp profile storage component having chirp profile parameter outputs coupled to the chirp profile parameter inputs of the timing control component; and a chirp profile address input coupled to the chirp profile address output.

Abstract: A radar system is provided that includes a first radar transceiver integrated circuit (IC) including transmission signal generation circuitry operable to generate a continuous wave signal and a first transmit channel coupled to the transmission generation circuitry to receive the continuous wave signal and transmit a test signal based on the continuous wave signal, and a second radar transceiver IC including a first receive channel coupled to an output of the first transmit channel of the first radar transceiver IC via a loopback path to receive the test signal from first the transmit channel, the second radar transceiver IC operable to measure phase response in the test signal.

Abstract: A first signal is sampled at the LiDAR system to produce a first set of samples around a first detected frequency peak related to the first signal. A second signal is sampled at the LiDAR system to produce a second set of samples around a second detected frequency peak related to the second signal. A first function based on the first set of samples and a second function based on the second set of samples are created. The first and second functions are convolved to produce a third function. Provided an index of a convolution peak value is the same as a first peak index, it is determined not to refine the first signal or the second signal. Provided the index of the convolution peak value is not the same as the first peak index, at least one of the first signal or the second signal is refined.

Abstract: An improved method for optical distance measurement is provided, in which only subsets of the transmitting elements of the transmission matrix are activated when using a transmission matrix to transmit measuring pulses and a reception matrix for receiving the latter.

Abstract: Provided are a light-receiving device and lidar comprising the light-receiving device. The light-receiving device comprises: a first lens comprising a first lens surface for receiving light from an outside and a second lens surface for changing the path of the light received by the first lens surface and outputting the light to the outside; and a sensor on which light transmitted through the second lens surface is incident, wherein the first lens surface is a spherical surface, the second lens surface is an aspherical surface, and the focus of the first lens deviates from the sensor surface of the sensor.

Abstract: An apparatus configured to generate a first sonar image from first sonar returns corresponding to a first depth range and generate a second sonar image from the first sonar returns and second sonar returns, the second sonar returns corresponding to a second depth range greater than the first depth range of the first sonar returns such that a portion of the second sonar image does not include sonar return data. The portion without sonar return data corresponds to a period of the first sonar returns and depths greater than the maximum depth of the first depth range. The apparatus is configured to generate and display a fill image for the portion of the second sonar image based on at least one set of side facing sonar return data corresponding to the time period associated with the first sonar returns.

Abstract: An object detection apparatus 1 includes: an emitting unit 101 for emitting an RF transmission signal; a receiving unit 201 for receiving, if the RF transmission signal is reflected off an object, the reflected RF transmission signal as an RF reception signal; an IF signal generating unit 202 for generating, in every period, a complex IF signal based on a signal obtained by mixing the RF transmission signal with the RF reception signal; a position detecting unit 203 for detecting the position of the object based on an evaluation function generated based on the complex IF signal generated in every period; and a displacement detecting unit 204 for detecting a displacement of the object based on the position of the object and the phase of complex reflectance of the object calculated based on the complex IF signal.

Abstract: A ghost removal method includes steps of detecting, estimating and excluding. In the detecting, a position and a relative speed of a target moving object, and a position of a surrounding stationary object are detected with radio waves. In the estimating, a position and a relative speed of a ghost by the target moving object are estimated based on the detected position and relative speed of the target moving object and the position of the surrounding stationary object. In the excluding, a detected point where the estimated position and the relative speed of the ghost are detected is excluded from a candidate detection point of a moving object which is detected with radio waves.

Abstract: An information processing apparatus includes a calculation unit configured to calculate distance spectra based on a beat signal being a difference between a transmitted wave, which is a radio wave that is transmitted by a sensor and that is swept in frequency, and a reflected wave of the transmitted wave, the reflected wave being received by the sensor, and configured to calculate one or more time-sequenced waveforms each indicating time changes in intensity of the distance spectra with respect to respective distances from the sensor, and a detection unit configured to detect respiration of a living organism based on the one or more time-sequenced waveforms.

Abstract: A method includes at least a preliminary step of storing a set of tracking algorithms as a function of types of targets and of environments, each tracking algorithm being a function of a type of target in a given environment; a step of detecting signals backscattered by the targets resulting in primary detections being obtained; the detection step being followed, for each detected target: by a step: of characterizing the detected target into types of target on the basis of the primary detections; and of analysing the environment of the targets in order to determine in which given environment each detected target is located; a step of adapting the tracking to each detected target, the adapting being completed by selecting the tracking algorithm as a function of the type of target to which the target belongs and of the given environment in which it is located.

Abstract: An operation method of an electronic device for transmitting and receiving data through an ultra wideband (UWB) in a wireless communication system includes: transmitting, to another electronic device, a first ranging control message; transmitting, to the other electronic device, a ranging start message based on the first ranging control message; and receiving, from the other electronic device, a ranging response message based on the first ranging control message.

Abstract: A synthetic aperture radar (SAR) generates concurrent first radar pulses in first frequency channels. The SAR transmits, and receives returns of, the concurrent first radar pulses by first antenna feeds that form first beams in the first frequency channels and that are directed to respective first subswaths of a swath on the Earth separated by subswath gaps. The SAR generates concurrent second radar pulses in second frequency channels. The SAR transmits, and receives returns of, the concurrent second radar pulses by second antenna feeds configured to form second beams in the second frequency channels and that are directed to respective second subswaths of the swath on the Earth and that coincide with the subswath gaps. The SAR processes the returns of the first radar pulses from the first subswaths and the returns of the second radar pulses from the second subswaths to form a SAR image contiguous across the swath.

Abstract: A flying body includes an observation data generation unit that generates observation data on the basis of radio waves received by a radar, an image generation unit that generates an image representing a monitoring space on the basis of the observation data generated by the observation data generation unit, and a detection unit that detects a detection target on the basis of the image generated by the image generation unit.

Abstract: A radar system has different modes of operation. In a method for operating the radar system, at least one of one or more transmitters are configured to transmit modulated continuous-wave radio signals, while at least one of one or more receivers are configured to receive radio signals. The received radio signals include the transmitted radio signals transmitted by the one or more transmitters and reflected from objects in the environment. The method further includes selectively modifying an operational parameter of at least one of the transmitters or at least one of the receivers. The selected operational parameter is modified to meet changing operational requirements of the radar sensing system.

Abstract: To accurately calculate a location range which a ship is capable of reaching within a prescribed time interval. A signal processing device is configured so as to be equipped with reachable range calculation units 17, 18 which calculate a reachable range, which is the location range a ship is capable of reaching within a prescribed time interval, on the basis of the static information of the ship.

Abstract: A system, computer program product and method of examining the ionosphere is disclosed. The method includes capturing, at one or more antennas, radio frequency (RF) emissions preceding a broadband emission event. The RF emissions are then recorded at one or more broadband receivers over a period of time. A first tuning of the received RF emissions is selected to detect ionospheric reflections, and a second tuning of the received RF emissions is selected to detect direct line of sight emissions. From the selected tunings, an amplitude or complex time series of the second tuning with one or more channels of the first tuning are correlated to calculate a relative virtual echo height of the ionosphere.

Abstract: An ultrasonic sensor device including a plurality of ultrasonic sensors and a control unit for operating the ultrasonic sensors, the control unit being configured to activate selectively either a first group of the ultrasonic sensors or a second group of the ultrasonic sensors at the same time, so that the activated ultrasonic sensors emit an ultrasonic signal, each ultrasonic sensor of the first group being situated adjacent to at least one ultrasonic sensor of the second group and each ultrasonic sensor of the second group being situated adjacent to at least one ultrasonic sensor of the first group, and the control unit being configured to operate adjacent active ultrasonic sensors using different frequency-modulated excitation patterns.

Abstract: A LIDAR system includes a reference light source configured to generate an outgoing light signal that includes multiple reference channels that each has a different frequency. The system also includes a comparative light source configured to generate an outgoing light signal that includes multiple comparative channels. Each of the comparative channels has a different frequency. The comparative channels are each associated with one of the reference channels in that LIDAR data is generated for a sample region on a field of view using a comparative channel and the associated reference channel. The comparative channel and the associated reference channel have different frequencies.

Abstract: A remote tracking system such as a LIDAR system may track objects such as human faces. In such objects there is a natural axis of symmetry that is seen to be substantially normal to the orientation of the object. Nevertheless, because the object is typically in motion, one cannot expect that beams incident on the object to be normal to the object consistently. Rather, the beams tend to dwell on the object at some skew angle. In a typical case, the detected beam pattern from a given portion of the object is dependent on this dwell angle. In conventional remote tracking systems, it may be difficult to identify the portion of the object efficiently through all of the possible beam patterns due to variation of the dwell angle. It is an objective of improved techniques described herein to efficiently monitor and track an object regardless of the dwell angle.

Abstract: A LIDAR system includes a laser source, a first scanner, and a second scanner. The first scanner receives a first beam from the laser source and applies a first angle modulation to the first beam to output a second beam at a first angle. The second scanner receives the second beam and applies a second angle modulation to the second beam to output a third beam at a second angle.

Abstract: A positioning system including a satellite signal receiver 20 that receives satellite signals from a plurality of positioning satellites; a plurality of indoor pseudo satellite stations that transmit pseudo satellite signals; and a pseudo station control device that selects the positioning satellites to be allocated to the plurality of pseudo satellite stations based on the received satellite signals, allocates a PRN code corresponding to each of the selected positioning satellites to each of the plurality of pseudo satellite stations one by one, determines a delay time of the PRN code allocated to the plurality of pseudo satellite stations, and transmits a plurality of pseudo satellite signals generated using the PRN code corresponding to each of the plurality of pseudo satellite stations and the delay time to each of the plurality of pseudo satellite stations.

Abstract: System and method for concurrently protecting Iridium and GPS L1/L2 band received satellite signals against interference signals (e.g., jamming signals) using space-time adaptive processing (STAP). While the GPS signal is protected against jamming using Nulling of the interfering signals, the Iridium signal is protected using Beamforming. A single broadband small controlled reception pattern antenna (sCRPA) array receives both the GPS (L1 and L2) and Iridium signals for the STAP-based antijam solutions outputting filtered Iridium and GPS signals. Use of a common (small) broadband antenna and common front end signal processing of the received signals enables an integrated system for use on size, weight, and power constrained platforms such as drones, unmanned aerial vehicles (UAVs), and helicopters.

Abstract: Various embodiments of the present technology generally relate to Global Navigation Satellite Systems (GNSS). More specifically, the embodiments of the present technology relate to a smart antenna module resistant to Radio Frequency Interference (RFI) saturation for dual-frequency GNSS receivers. In some embodiments, a dynamically configured antenna module architecture can be for a dual-band (or multi-frequency) GNSS receiver that can adapt to different RFI conditions by performing corresponding working modes. For example, some embodiments of the smart antenna can measure (e.g., using a power detector) the power of an incoming multi-frequency signal to determine when the multifrequency signal is saturated. Then, using control logic the smart antenna can determine which frequency in the multi-frequency signal is usable and isolate (e.g. using radio frequency components) a frequency that is not saturated. A position estimate can then be generated based on the isolated multi-frequency signal.

Abstract: A position estimation unit (2) comprising a first transceiver device (3) and a processing unit (10) that is arranged to repeatedly calculate time-of-flight (TOF) for radio signals (x1, x2, x3, x4, x5, x6) sent pair-wise between two transceivers among the first transceiver device (3) and at least two other transceiver devices (7, 8, 9); calculate possible positions for the transceiver devices (3, 7, 8, 9), which results in possible positions for each transceiver device (3, 7, 8, 9); and perform Multidimensional scaling (MDS) calculation in order to obtain relative positions of the transceiver devices (3, 7, 8, 9) in a present coordinate system. After two initial MDS calculations, between every two consecutive MDS calculations, the processing unit (10) is arranged to repeatedly perform a processing procedure comprising translation, scaling and rotation of present coordinate system such that a corrected present coordinate system is acquired.

Abstract: A radiation monitor for a lighting device, and operating methods and systems therefor are provided. In one example, a radiation monitor may include a first sensor receiving radiation output directly from a light-emitting element of the lighting device and radiation output from external sources; and a second sensor receiving the radiation output from the external sources without receiving the radiation output directly from the light-emitting element of the lighting device. The radiation monitor may determine an intensity of the radiation output directly from the light-emitting element based on a difference in the output signals from the first sensor and the second sensor.

Abstract: A radiation detector includes a sensor substrate, a conversion layer, and a neutral stress plane adjustment member. The sensor substrate includes a flexible base member, and a layer provided on a first surface of the base member and formed with plural pixels configured to accumulate electrical charge generated in response to light converted from radiation. The conversion layer is provided on the opposite side of the layer formed with the plural pixels to the side where the base member is provided and is configured to convert radiation into the light. The neutral stress plane adjustment member is provided on a second surface side of the base member on the opposite side of the base member to the first surface and is configured to adjust a position of a neutral stress plane to within a predetermined range in a stacking direction.

Abstract: A method of detection of radiation is described. The method comprises providing at least one source of radiation; providing at least one detector capable of detecting radiation from the source; causing said source to emit radiation along a predetermined radiation path towards said detector; during a measurement period, detecting successive count events corresponding to photons from the source detected by the detector; measuring a duration of each such count event to determine a dead time associated with each count event; calculating a total dead time for the measurement period as the sum of each determined dead time associated with each count event; determining a photon count rate from the total number of count events during the measurement period; calculating a corrected count rate by applying a correction factor based on subtracting the total dead time from the measurement period. A method of scanning an object and apparatus for performing the methods are also disclosed.

Abstract: The present invention provides a detector and an emission tomography device including the detector. The detector comprises: a scintillation crystal array comprising a plurality of scintillation crystals; and a photo sensor array, coupled to an end surface of the scintillation crystal array and comprising multiple photo sensors. At least one of the multiple photo sensors is coupled to a plurality of the scintillation crystals respectively. Surfaces of the plurality of the scintillation crystals not coupled to the photo sensor array are each provided with a light-reflecting layer, and a light-transmitting window is disposed in the light-reflecting layer on a surface among the surfaces adjacent to a scintillation crystal coupled to an adjacent photo sensor. The detector has DOI decoding capability. No mutual interference occurs during DOI decoding, and decoding is more accurate.

Abstract: The active neutron spectrometer (1) comprises a polyhedral moderator body (2) of hydrogenated material having a first, a second and a third orthogonal main axis (X1, X2; Y1, Y2; Z1, Z2), a first series of thermal neutron detectors (3a1, 3a2, 3a3, 3a4, 3a5, 3a6, 3b1, 3b2, 3b3, 3b4, 3b5, 3b6) arranged along the first main axis (X1, X2), a second series of thermal neutron detectors (4a1, 4a2, 4a3, 4a4, 4a5, 4a6, 4b1, 4b2, 4b3, 4b4, 4b5, 4b6) arranged along the second main axis (Y1, Y2), and a third series of thermal neutron detectors (5a1, 5a2, 5a3, 5a4, 5a5, 5a6, 5b1, 5b2, 5b3, 5b4, 5b5, 5b6) arranged along the third main axis (Z1, Z2).

Abstract: A method for evaluating a single-photon detector signal includes duplicating the single-photon detector signal into a first and a second signal. The first signal is processed and the second signal is either not processed or is processed in a manner different from the first signal. A differential signal is formed between the unprocessed or differently processed second signal and the processed first signal. The differential signal is evaluated to determine pulse events.

Abstract: A method of seismic acquisition using a dispersed-source array (DSA) comprising two or more sources. The method comprises determining, for each of the two or more sources of the DSA, an individual spectrally-banded waveform. For each of the two or more sources, a primary waveform is formed by repeating the individual spectrally-banded waveform. For each of the two or more sources, a secondary waveform is formed based on the primary waveform. The secondary waveform is spectrally shifted relative to the primary waveform such that secondary waveforms of any two of the two or more sources are spectrally non-overlapping. The blending operator based on the secondary waveform of each of the two or more sources is provided to the DSA. The method also includes performing deblended-data reconstruction of acquired seismic data using one or more properties of the blending operators of the two or more sources.

Abstract: A seismic data acquisition unit includes circuitry to detect and digitize a seismic signal, and timing circuitry to control a time of acquisition of each sample of the seismic signal. The timing circuitry include a voltage controlled oscillator (VCO), a local clock incremented by the VCO, and a reference time receiver. The timing circuitry powers on the reference time receiver to generate a reference time value based on signals received from a reference time source, and measures time deviation of the local clock from the reference time value. The timing circuitry determines an adjustment value to apply to the VCO over a time interval during which the reference time receiver is not powered on. The adjustment value is selected to gradually bring the local clock into synchronization with the reference time source over the time interval at a time that the reference time receiver is to be next powered on.