Abstract: Disclosed herein are methods, systems, and computer-readable media for operating an electronic locking device. The disclosed methods include a method of predicting a battery life of an electronic locking product based at least in part on a usage history of the electronic locking product. The predicted battery life may include an adjustment based on received weather information relating to a location of the electronic locking device. The disclosed methods include a method of sharing an unlocking code to an electronic locking product by a first user to a second user.

Abstract: (Subject) To provide a differential magnetic sensor capable of accurate magnetic detection of a local weak magnetic field even when there is a difference in detection sensitivity of a plurality of magnetic sensors used as a differential type magnetic sensor.

Abstract: The invention relates to magnetic sensor comprising a sensor element that is able to generate a spin-orbit torque (SOT). The SOT acts as a transverse bias field to set a proper working point for the sensor and so ensure that it responds linearly to an external field with maximized sensitivity. It also functions as a longitudinal bias field to suppress domain wall nucleation and propagation. The use of SOT effective field for biasing not only simplifies the sensor structure but also makes it possible to make an ultrathin and semi-transparent magnetic sensor.

Abstract: Disclosed herein is an inductance element for a magnetic sensor. The inductance element includes a first core comprising a first soft magnetic material and having first and second connecting surfaces, a second core comprising a second soft magnetic material different from the first soft magnetic material and having third and fourth connecting surfaces facing the first and second connecting surfaces, respectively, and a coil wound around the first core between the first and second connecting surfaces, wherein the first core is larger in magnetic field strength at which magnetic saturation occurs than the second core, and wherein the second core is higher in permeability than the first core and has at least partially a meander shape.

Abstract: A system for controlling a wireless-type radio frequency (RF) coil apparatus (102, 202, 302, 500) for a magnetic resonance (MR) system including a processor for acquiring emitted radio frequency (RF) signals from a plurality of coils of an RF transducer array including an indication of a local clock signal indicating a time of (RF) signal acquisition; acquiring magnetic field strength information from a plurality of field probes of a magnetic field probe array including an indication of the local clock signal indicating a time of magnetic field strength information acquisition, and forming k-space information based upon the acquired emitted RF signals from the plurality of coils of the RF transducer array and the acquired magnetic field strength information including the indications of the local clock signal.

Abstract: The invention provides for a magnetic resonance system (100) comprising a magnet (104) for generating a main magnetic field within the measurement zone and a magnetic field gradient system (110, 112) for generating a gradient magnetic field within the measurement zone in at least one direction by supplying current to a set of magnetic gradient coils (112) for each of the at least one direction. Instructions cause a a processor (130) controlling the magnetic resonance system, wherein execution of the machine executable instructions causes the processor to acquire (200) the magnetic resonance data by controlling the magnetic resonance system with pulse sequence commands. The pulse sequence commands (140) cause the magnetic resonance system to acquire the magnetic resonance data according to a magnetic resonance fingerprinting technique. The pulse sequence commands specify a train (500) of pulse sequence repetitions (502, 504), each with a fixed repetition time (302).

Abstract: A computer-implemented method for performing multi-slice magnetic resonance imaging with comparable contrast between simultaneously excited slices includes applying a first pulse sequence to a volume of interest to acquire a first k-space dataset. This first pulse sequence comprises a plurality of single-band slice-selective pulses applied in a first predefined order. One or more additional pulse sequences are also applied to the volume of interest to acquire one or more additional k-space datasets. Each additional pulse sequence comprises the plurality of single-band slice-selective pulses applied in one or more additional predefined orders that are distinct from the first predefined order. One or more final images are reconstructed using the first k-space dataset and the one or more additional k-space datasets.

Abstract: According to one embodiment, a magnetic resonance imaging apparatus provided with a plurality of transmission channels includes a signal processing unit and a control unit. The signal processing unit acquires a radio frequency magnetic field emitted from each of the plurality of transmission channels through a receiver coil mounted on an object and measure a phase of the radio frequency magnetic field. The control unit determines a phase difference between the plurality of transmission channels based on the phase of the radio frequency magnetic field of each of the plurality of transmission channels measured by the signal processing unit. The control unit controls a phase of a radio frequency pulse inputted to each of the plurality of transmission channels, based on the phase difference.

Abstract: A method and system provides an acquisition scheme for generating magnetic resonance elastography displacement data with whole-sample coverage, high spatial resolution, and adequate SNR in a short scan time. The method and system can acquire in-plane and through-plane k-space shots over a volume of a sample divided into a plurality of slabs that each include a plurality of non-adjacent slices to obtain three dimensional multiband, multishot data, can apply multiband radio frequency refocusing pulses to the sample, can acquire navigators before readout, and can correct for non-linear motion errors.

Abstract: Disclosed is a system and method that provide a means to overcome errors in determining the source of an electromagnetic event due to reflection, absorption and scattering of the electromagnetic field due to metallic parts of the electric equipment.

Abstract: There is provided a test module for testing a fingerprint sensing device comprising: an electrically conductive bottom element comprising an exterior surface portion configured to contact a sensing surface of the fingerprint sensing device; an electrically conductive intermediate element, connected to the bottom element on a side opposing the exterior surface, the intermediate element comprising a flexible material enabling the bottom element to change alignment in response to an applied force occurring when the exterior surface is pressed against a surface being tilted with respect to the exterior surface of the bottom element; and a top element configured connect the test module to a test fixture. There is also provided a method for testing a fingerprint sensing device using the described test module.

Abstract: A position determining device is configured to determine the position of a portable device configured to receive one or more radio signals transmitted from one or more antennas inside a vehicle, respectively. The position determining device includes a processor configured to determine the open or closed state of a door of the vehicle for getting in and out of the vehicle, calculate an evaluation value related to the position of the portable device based on the received signal strength of the one or more radio signals at the portable device, and determine that the portable device is positioned inside the vehicle when the evaluation value satisfies a predetermined condition. The processor is configured to change at least one of the predetermined condition and a method of calculating the evaluation value in accordance with the determined open or closed state of the door.

Abstract: A sensor pod includes a main bracket including a base portion, a center support surface spaced apart from the base portion, and first, second, third, and fourth support surfaces connected to the center support surface. Each of the first, second, third, and fourth support surfaces are angled with respect to the center support surface and are disposed equidistant about the center support surface. The first and second support surfaces are connected to the base portion. A center sensor is disposed on the center support surface and first, second, third, and fourth sensors are each one disposed on one of the first, second, third, and fourth support surfaces. A housing is disposed overtop the main bracket, the center sensor, and the first, second, third, and fourth sensors.

Abstract: Method and apparatus for leakage signal cancellation in a simultaneous transmit and receive RF system includes: generating a digital transmit signal for transmission from the system; receiving a receive signal produced by reflection of the transmit signal from an object or generated by a second RF system; adaptively filtering the transmit signal by an adaptive finite input response (FIR) filter; calculating filter coefficients for the adaptive FIR filter in real-time at a different sampling rate; adaptively inputting the calculated filter coefficients to the adaptive FIR filter to generate a cancellation signal in real-time; and applying the cancellation signal to the receive signal to cancel leakage in the receive signal to generate an optimum receive signal.

Abstract: A method of training a heterogeneous sensory system, including: accepting data of an environment from a first sensor, identifying objects in the data from the first sensor by a first processing unit, accepting data of the environment from a second sensor corresponding to the data of the first sensor, identifying objects in the data from the second sensor by a second processing unit, comparing the identified objects from the first processing unit and the corresponding objects from the second processing unit with a system processing unit, determining cases of discrepancies, between the objects identified in the data of the first sensor and not in the data of the second sensor or vice versa, tagging the data of the cases with discrepancies, storing the tagged data in a training buffer; and training the first processing unit and/or the second processing unit with the data stored in the training buffer.

Abstract: A radar level transmitter (1, 1a) includes a detection body (10, 10a), an antenna body (20, 20a) and a film sheet (30, 30a). The detection body (10, 10a) has a circuit board (12) being capable of emitting signals of detection and receiving reflected signals. One end of the antenna body (20, 20a) connects with the detection body (10, 10a). The film sheet (30, 30a) is combined with the antenna body (20, 20a) and covers another end of the antenna body (20, 20a); an airflow passes through the film sheet (30, 30a) for being capable of removing dusts adhered to the film sheet (30, 30a). Therefore, a radar level transmitter (1, 1a) with dust removing structures is achieved and a regular cleaning by personnel is not necessary.

Abstract: Disclosed is an apparatus for calibrating and validating an MRR, the apparatus including a correlation calculation unit configured to determine a correlation between a precipitation strength value and a precipitation measurement value, a regression equation calculation unit configured to calculate a regression equation for the precipitation strength value and to calculate a result value of the regression equation, an optimum accumulation time determination unit configured to determine an optimum accumulation time based on the correlation and the result value, a rain cloud vertical sampling unit configured to sample a rain cloud example, a vertical reflectance comparison unit configured to compare a calibrated MRR at a shortest range distance with a vertical reflectance according to a wind system, and a radar constant correction unit configured to correct a constant of an MRR based on the optimum value or the sampling and a result value of the comparison.

Abstract: A method for analyzing the resolution and/or the accuracy of a transmission unit of a radar sensor is described wherein a transmitter signal is received via a receiving unit. At least one echo signal based on said received signal is simulated. The frequency difference of said transmitter signal and said echo signal is determined. Said frequency difference is filtered and transformed in order to obtain a transform. At least one maximum of said frequency difference in said transform is detected. Spectral properties of said frequency difference in said transform are determined. At least one quality parameter of said spectral properties is outputted. Further, a radar sensor is described.

Abstract: A method for classifying an airborne object detected by a radar system is disclosed. The method includes the steps of identifying quefrency peaks in a quefrency cepstrum generated from a received radar return signal, the quefrency peaks indicative of a rotating physical feature of the airborne object. A rotational velocity of the physical feature is determined based on the quefrency peaks. The method further includes determining at least one parameter or characteristic of a physical feature of the airborne object. The at least one characteristic is compared to a known physical feature stored in a classifier database, wherein a classification decision is made upon identifying a match between the at least one characteristic and a known physical feature stored in the database.

Abstract: In one embodiment a LIDAR generates high-intensity laser pulses with intensities above a threshold intensity (e.g. above an eye-safe intensity) in a 2-D angular range in a field of view. The LIDAR further generates low-intensity (e.g. eye-safe) laser pulses in a protective guard region (e.g. a guard ring) that surrounds the high-intensity laser pulses. In response to detecting an aspect of an object using reflections from the low-intensity laser pulses (e.g. a person on a trajectory that will intersect the high-intensity laser pulses) the LIDAR modifies the angular range of subsequent high-intensity laser pulses. In this way the LIDAR can adapt or steer the angular range of the high-intensity laser pulses to avoid an object detected within the low-intensity guard region.

Abstract: A three-dimensional image 3DI system includes a modulator configured to generate a first modulation signal and a second modulation signal having a predetermined frequency difference, an illumination source configured to generate a light signal modulated by the first modulation signal, and a sensor core including a pixel array modulated by the second modulation signal. At least one pixel of the pixel array is configured to receive a reflected modulated light signal and to demodulate the reflected modulated light signal using the second modulation signal during an image acquisition to generate a measurement signal. The at least one pixel is configured to generate a plurality of measurement signals based on a plurality of image acquisitions taken at different sample times. A controller is configured to receive the plurality of measurement signals, and calibrate the at least one pixel of the pixel array based on the plurality of measurement signals.

Abstract: An optical sensor device configured to detect a time of flight of an electromagnetic signal includes a semiconductor substrate with a conversion region configured to convert at least a portion of the electromagnetic signal into photo-generated charge carriers. A deep control electrode is formed in a trench extending into the semiconductor substrate. The deep control electrode extends deeper into the semiconductor substrate than a shallow control electrode. A control circuit is configured to apply to the deep control electrode and to the shallow control electrode varying potentials having a fixed phase relationship to each other, to generate electric potential distributions in the conversion region, by which the photo-generated charge carriers in the conversion region are directed. The directed photo-generated charge carriers are detected at at least one readout node.

Abstract: Provided is an ultrasonic sensor device and a sensing method thereof. The device includes a driving unit for providing a transmission pulse to a transducer which transmits an ultrasonic wave and receives an echo of the ultrasonic wave; an amplifier for amplifying an electrical signal for the echo; an analog-to-digital converter for converting the amplified electrical signal into an original digital signal; a signal processor for performing an envelope extraction processing of the original digital signal to generate an extracted signal; and a control unit for outputting a distance signal with respect to an external object based on the original digital signal and the extracted signal, wherein the control unit includes: a test frequency generator for applying a test frequency signal to the transducer, and an excitation frequency measuring unit for measuring the excitation frequency generated in the transducer.

Abstract: A distance measuring apparatus measures a distance to a target from a plurality of directions, and includes sensors having identical two-dimensional scan type configurations that launch a laser beam and receive reflected light from the target by a multi-segment light receiving element, and a processor. The processor performs a process including specifying a receiving part of the multi-segment light receiving element of a first sensor, that receives a second laser beam launched from a second sensor in a state in which the target is non-detectable by the first sensor, adjusting a phase in a vertical scan direction of the second laser beam with respect to that of a first laser beam launched from the first sensor, until the receiving part no longer receives the second laser beam, and integrating range images from the first and second sensors after the phase is adjusted.

Abstract: The invention relates to a device for detecting objects within a sweep range, comprising at least two switchable transmitting antennas (10), a plurality of receiving antennas (20), the transmitting antennas (10) and receiving antennas (20) respectively extending longitudinally, parallel to one another, in a first direction (y), and the receiving antennas (10) being arranged in a row and the row extending in a second direction (x), the receiving antennas (20) and the transmitting antennas (10) being arranged such that they produce a synthetic receiving antenna array for the beam sweep by means of the sequential activation of the transmitting antennas and the positions of the transmitting and receiving antennas, the resulting distance corresponding to the positions of the receiving antennas in the synthetic receiving antenna array in the second direction d, the adjacent receiving antennas in the device being spaced apart by a distance of d2 or greater and d2 being twice as great as distance d.

Abstract: A method and system for generating a three dimensional map of an environment based on information acquired by radar. The system includes a ground-based vehicle, and a scanning radar, or combination of radars, that scans the surrounding environment in one or more vertical planes or along azimuth angles. The radar may be an electrical beam steering and scanning radar or a combination electrical beam scanning radar and mechanical scanning radar. Dynamic objects within the environment may also be identified and removed with the remaining static objects being used to generate a three dimensional map of the surrounding environment and to perform localization within the three dimensional map.

Abstract: One or more sensors are configured for detection of characteristics of moving objects and living subjects for human identification or authentication. One or more processors, such as in a system of sensors or that control a sensor, may be configured to process signals from the one or more sensors to identify a person. The processing may include evaluating features from the signals such as breathing rate, respiration depth, degree of movement and heart rate etc. The sensors may be radio frequency non-contact sensors with automated detection control to change detection control parameters based on the identification of living beings, such as to avoid sensor interference.

Abstract: A system for determining the physical path of an object can map several candidate paths to a suitable path space that can be explored using a convex optimization technique. The optimization technique may take advantage of the typical sparsity of the path space and can identify a likely physical path using a function of sensor observation as constraints. A track of an object can also be determined using a track model and a convex optimization technique.

Abstract: Embodiments of the invention are directed to a method of determining underground liquid (e.g., water) content. Embodiments of the method may include: receiving a scan of an area at a first polarization, the scan scans including reflections from the area. Embodiments of the invention may include receiving an additional data. Embodiments of the method may further include filtering electromagnetic noise from the scan using the additional data. Embodiments of the method may further include creating a water roughness map based on typical roughness values of various types of water sources and the filtered scan, identifying a first type of water sources using the water roughness map and the filtered scan and calculating the water content at locations in the area based on the identified first type of water sources.

Abstract: The present disclosure relates to limitation of noise on light detectors using an aperture. One example embodiment includes a system. The system includes a lens disposed relative to a scene and configured to focus light from the scene onto a focal plane. The system also includes an aperture defined within an opaque material disposed at the focal plane of the lens. The aperture has a cross-sectional area. In addition, the system includes an array of light detectors disposed on a side of the focal plane opposite the lens and configured to intercept and detect diverging light focused by the lens and transmitted through the aperture. A cross-sectional area of the array of light detectors that intercepts the diverging light is greater than the cross-sectional area of the aperture.

Abstract: A LIDAR sensor for detecting an object in the surroundings, and to a method for activating a LIDAR sensor, the LIDAR sensor including at least one transmitting unit for emitting electromagnetic radiation, at least one receiving unit for receiving electromagnetic radiation which was reflected by the object, at least one refractive element, which is at least partially pervious to the electromagnetic radiation, and a rotating unit, which includes at least the at least one refractive element, the at least one transmitting unit and the at least one receiving unit. The core of the invention is that the at least one refractive element includes at least one optical lens and a beam splitter for splitting the electromagnetic radiation, two focal planes being present. The at least one transmitting unit and the at least one receiving unit are positioned in at least one focal plane of at least one refractive element.

Abstract: The processing unit causes a light source unit to emit modulated light in one or more emission periods in a plurality of charge transfer cycles within a frame period from connection of an accumulating region to a reset potential to next connection of the accumulating region to the reset potential by controlling a reset switch, and increases the number of emission periods per charge transfer cycle within one frame period. The processing unit obtains, from a sensor unit, a plurality of read values corresponding to a charge amount accumulated in the accumulating region at an alternate point with the plurality of charge transfer cycles, in each of a plurality of read cycles corresponding to each of the plurality of charge transfer cycles. The processing unit calculates the distance based on the plurality of obtained read values.

Abstract: A distance measuring device executes a collection process that includes driving a MEMS mirror in each of a plurality of sensors and collecting a drive voltage of the MEMS mirror satisfying a given condition, executes a drive frequency determination process that includes determining a drive frequency of the MEMS mirror when measuring distances by the plurality of sensors based on the drive voltage of the MEMS mirror, and executes a control signal generation process that includes generating and transmitting a control signal to the plurality of sensors, the control signal including configuration information specifying the drive frequency as a drive frequency of the MEMS mirror in each of the plurality of sensors, the configuration information including the drive frequency determined by the drive frequency determination process.

Abstract: A full-spectrum covering ultra wideband full-photonics based radar system comprising a signal transmitter, a transceiver module, and a signal receiver. The signal transmitter comprises a mode-locked laser, a first dispersion module, a first optical coupler, a second optical coupler, a first optical filter, a second dispersion module, a second optical filter, a first adjustable time delay module, a third optical coupler, an optical amplifier, and a first photodetector; the transceiver module comprises a band selector, a first electrical amplifier array, a T/R component array, an antenna array, and a second electrical amplifier array; the signal receiver comprises a third optical filter, a second adjustable time delay module, an electro-optical modulator, a third dispersion module, a second photodetector, an analog-digital conversion module, and a signal processing module.

Abstract: Detecting material properties such reflectivity, true color and other properties of surfaces in a real world environment is described in various examples using a single hand-held device. For example, the detected material properties are calculated using a photometric stereo system which exploits known relationships between lighting conditions, surface normals, true color and image intensity. In examples, a user moves around in an environment capturing color images of surfaces in the scene from different orientations under known lighting conditions. In various examples, surfaces normals of patches of surfaces are calculated using the captured data to enable fine detail such as human hair, netting, textured surfaces to be modeled. In examples, the modeled data is used to render images depicting the scene with realism or to superimpose virtual graphics on the real world in a realistic manner.

Abstract: A technique for more providing precise and simple positioning processing includes configuring a positioning processing device to perform positioning processing using satellite positioning correction data from a satellite.

Abstract: The present invention relates to a vehicle-to-X communication system (100) for a vehicle (101). The vehicle-to-X communication system (100) comprises a first communication module (103) having a first antenna (104), wherein the first antenna (104) has a first communication angle; a second communication module (107) having a second antenna (108), wherein the second antenna (108) has a second communication angle; wherein the first communication module (103) and the second communication module (107) are arranged in such a manner that the first antenna (104) and the second antenna (108) are oriented in different directions, in order to obtain a total communication angle which is composed of the first communication angle and the second communication angle.

Abstract: A scintillator panel includes alternately arranged scintillator portions and non-scintillator portions, in which the scintillator portions include a stress-relaxing portion. Preferably, a stress-relaxing portion content in 100% by volume of the scintillator portions is from 2 to 50% by volume.

Abstract: An analyzer device can receives a pulse from a photosensor, obtain an initial calculated area under a curve representing the pulse, and obtain a recalculated area under the curve representing the pulse. In an embodiment, the initial calculated area and the recalculated area can base obtained via initial and subsequent integrations, respectively. The initial and subsequent integrations can be performed for different integration time periods. The subsequent integration may allow for the pulse height resolution to be determined more accurately.

Abstract: The present invention relates to a direct conversion radiation detector for wherein the direct conversion material comprises a garnet with a composition of Z3(AlxGay)O12:Ce, wherein Z is Lu, Gd, Y, Tb or combinations thereof and wherein y is equal to or greater than x; and preferably Z comprises Gd. Suitable garnets directly convert radiation, such as x-rays or gamma-rays, into electronic signals. Preferably photoluminescence of the garnet is low or absent. The detector is particularly suitable for use in x-ray imaging devices, such as computed tomography. In some embodiments photoluminescence of garnets might be used to construct a hybrid direct-indirect conversion detector, which may be particularly suitable for use with Time-of-Flight PET.

Abstract: Silicon photomultiplier circuitry is provided that comprises at least one silicon photomultiplier pixel, each pixel comprising a plurality of silicon photomultiplier microcells. The silicon photomultiplier circuitry comprises control circuitry adapted to maintain a substantially constant voltage on a connection node between microcells of the pixel. The control circuitry is adapted to minimise the onset and recovery time of an output signal by maintaining a substantially constant voltage on the connection node.

Abstract: A boron coated straw detector for use in a neutron detection system is disclosed comprising a boron coated straw having at least one boron-coated septum radially oriented and extending a pre-determined distance towards the center of the straw. Preferably, the straw comprises a plurality of septa comprising a rigid surface, coated on both sides with a boron composition. Preferably, the septa run the length of the straw detector from one end of the straw to the other. The area coated on the septa adds to the area coated on the arc segments offering a significant benefit in sensitivity of the neutron detector.

Abstract: The present disclosure relates to a PET detector and a PET frame. The PET detector may include a plurality of detector modules and a plurality of installing modules configured to install the plurality of detector modules. The plurality of installing modules may be coupled together to form a detector ring. The PET frame may include a detector stabilizing cylinder configured to stabilize a detector and a fixing support configured to support the detector stabilizing cylinder. The detector stabilizing cylinder may be rotatably fixed on the fixing support.

Abstract: A radiation imaging apparatus includes a radiation detection unit with a pixel array configured to generate a signal according to radiation and a notification unit configured to perform notification by sound production. The radiation imaging apparatus includes: a detection unit configured to detect a plurality of notification events occurring in accordance with a state of the radiation imaging apparatus; and a control unit configured to control the notification by the notification unit based on priority set for each of the plurality of notification events.

Abstract: A system can include a first array of hydrophones and a second array of hydrophones. Each of the hydrophones can include a first detector and a second detector. A sensitivity of the first detector can be matched with a sensitivity of the second detector and a combined sensitivity of the first array of hydrophones can be matched with a combined sensitivity of the second array of hydrophones.

Abstract: A system and method of processing seismic data obtained using a plurality of towed single-component receivers in a marine environment is described, the towed single-component receivers configured to measure compressional P waves. The method comprises retrieving seismic data from a storage device, the seismic data comprising P-P data and shear mode data, wherein the P-P data and shear mode data were both received at the towed single-component receivers configured to measure compressional P waves to generate the seismic data. The method further comprises processing the seismic data to extract SV-P shear mode data and generating shear mode image data based on the extracted shear mode data.

Abstract: A method is described for seismic facies identification including receiving a seismic dataset representative of a subsurface volume of interest; performing a machine learning algorithm on the seismic dataset to identify seismic facies and generate a classified seismic image; and identifying geologic features based on the classified seismic image. The method may be executed by a computer system.

Abstract: A subsoil region is represented using a grid having columns of cells arranged in an array of horizontal positions. The cells of a column are delineated by geological layering of the subsoil region. The method, used for estimating elastic parameters in the subsoil region, comprises obtaining seismic traces and performing seismic inversion for the columns of cells. The seismic inversion for a column comprises selecting a set of elastic parameter values that minimizes a cost function regardless of statistical distribution of the elastic parameter values. The set of elastic parameter values is selected among a plurality of candidate sets of elastic parameter values each having values of elastic parameters for the cells of the column.

Abstract: The method processes, for each of a plurality of shots at respective source locations, seismic traces recorded at a plurality of receiver locations. Common-mid-point-modulated data are also computed by multiplying the seismic data in each seismic trace by a horizontal mid-point. A depth migration process is applied to the seismic data to obtain a first set of migrated data, and to the mid-point-modulated data to obtain a second set of migrated data. For each shot, aperture values are estimated and associated with respective subsurface positions. A migrated value for a depth and an aperture in a surface aperture common image gather at a horizontal position is a migrated value of the first set of migrated data for a shot such that the estimated aperture value associated with that subsurface position is the aperture.

Abstract: Techniques are disclosed relating to reducing noise in marine seismic survey data. A shot-by-shot depth migration of recorded marine seismic survey data that includes multiples wavefields indicative of surface reflections may be performed. Post-migration data generated by the migration may include angle information derived from the multiples wavefields. Attributes of the marine seismic survey data may be corrected using the angle information in order to identify a potential sub-surface structure.