Abstract: Optical systems and methods for collecting distance information are disclosed. An example optical system includes a first transmitting optic, a plurality of illumination sources, a pixel array comprising at least a first column of pixels and a second column of pixels, each pixel in the first column of pixels being offset from an adjacent pixel in the first column of pixels by a first pixel pitch, the second column of pixels being horizontally offset from the first column of pixels by the first pixel pitch, the second column of pixels being vertically offset from the first column of pixels by a first vertical pitch; and a set of input channels interposed between the first transmitting optic and the pixel array.

Abstract: A chip-scale coherent lidar system includes a photonic chip that includes a light source, a transmit beam coupler to provide an output signal, and a receive beam coupler to receive a received signal based on a reflection of the output signal by a target. The system also includes a transmit beam steering device to transmit the output signal out of the system, and a receive beam steering device to obtain the received signal into the system. A transmit beam curved mirror reflects the output signal from the transmit beam coupler to the transmit beam steering device. A receive beam curved mirror reflects the received signal from the receive beam steering device to the receive beam coupler. The transmit beam curved mirror and the receive beam curved mirror are formed in a substrate that is heterogeneously integrated with the photonic chip.

Abstract: A LIDAR system, LIDAR chip and method of manufacturing a LIDAR chip. The LIDAR system includes a photonic chip configured to transmit a transmitted light beam and to receive a reflected light beam, a scanner for directing the transmitted light beam towards a direction in space and receiving the reflected light beam from the selected direction, and a fiber-based optical coupler. The photonic chip and the scanner are placed on a semiconductor integrated platform (SIP). The fiber-based optical coupler is placed on top of the photonic chip to optically couple to the photonic chip for directing the a transmitted light beam from the photonic chip to the scanner and for directing a reflected light beam from the scanner to the photonic chip.

Abstract: A lidar system includes a photonic chip including a light source and a transmit beam coupler to provide an output signal for transmission. The output signal is a frequency modulated continuous wave (FMCW) signal. A transmit beam steering device transmits the output signal from the transmit beam coupler of the photonic chip. A receive beam steering device obtains a reflection of the output signal by a target and provides the reflection as a received signal to a receive beam coupler of the photonic chip. The photonic chip, the transmit beam steering device, and the receive beam steering device are heterogeneously integrated into an optical engine.

Abstract: A LIDAR arrangement comprising a laser transmitter for transmitting pulses of a laser radiation to a measurement object, and a receiver for receiving pulses of the laser radiation backscattered from the measurement object, wherein the laser transmitter is configured to transmit a pulse sequence in which successive pulses respectively comprise a particular optical frequency shift to each other and wherein the receiver either includes a dispersive element for separating the pulses in time depending on the optical frequency by a frequency-based deflection, and a position resolution optical matrix transmitter on which the pulses separated in time by the dispersive element are mapped, or includes a frequency analyzer for the frequency-based separation of the pulses by superimposition with a reference radiation.

Abstract: A semiconductor pixel unit for sensing near-infrared light, and for optionally simultaneously sensing visible light. The pixel unit comprises a single substrate with a first semiconductor region and a second semiconductor region electrically separated by an insulating region, for example a buried oxide layer. The pixel unit is adapted for generating a lateral electrical field in the second region for facilitating transport of photoelectrons generated in the second region by near-infrared light passing through the first region and the insulating region.

Abstract: An optoelectronic sensor (10) for measuring a distance of an object (18) in accordance with a time of flight principle comprises a light transmitter (12) for transmitting a light signal (14), a light receiver (22) for receiving the light signal (20) after reflection or remission by the object (18), the light receiver (22) having a first plurality of pixel elements (24, 24a) each configured as an avalanche photo diode element biased with a bias voltage greater than a breakdown voltage and thus operated in a Geiger mode in order to trigger an avalanche event upon light reception, a distance measuring unit (34) having a second plurality of time of flight measuring units (34a) connected to pixel elements (24a) for determining a time of flight between transmission and reception of a light signal, the second plurality being less than the first plurality, switching means (32, 32a) for connecting selected pixel elements (24a) to time of flight measuring units (34a) in a one-to-one fashion, and a pixel selection unit

Abstract: Measuring device (1) suited to measure the distance (d) of a reference object (O), configured so that it performs a plurality of measuring operations (Ai) in succession and comprising emission means (2) suited to emit a light radiation (R), receiving means (3) comprising a sensitive area (31) which is sensitive to the light radiation (R) and which is provided with a number M of sensitive units (4), each one of the sensitive units (4) being configured to generate an electrical signal (S), a first processing unit (5) comprising Ne processing elements (6), each one of said Ne processing elements (6) being configured to receive the electrical signal (S) for determining the time of impact (t) of a photon (F) on the sensitive units (4) and for calculating the value of said distance (d).

Abstract: Disclosed herein are methods and devices for light emitting depth sensors such as scanning depth sensors and LIDARS. Methods, devices and systems disclose tracking a beam of reflected light pulses on an array of light sensing pixels. The tracking can dynamically update a location of the beam or an expected on-center time of the reflected light pulses at a pixel of the array. Counts of detected reflected pulses in time periods before and after the expected on-center time at a pixel are used to detect offsets in initial estimates of the beam location or timing.

Abstract: A LIDAR system, optical coupler for a LIDAR system and method of optical communication. The LIDAR system includes an optical coupler having a chip-side face in optical communication with a photonic chip and a scanner-side face in optical communication with a scanner, the optical coupler comprising a polarization rotator and a birefringent wedge. A first beam of light is transmitted from the first location toward a chip-side face of an optical coupler to direct the first beam of light, via the optical coupler, along an optical path at a scanner-side face of the optical coupler. A second beam of light is received along the optical path at the scanner-side face and directed the second beam of light toward a second location.

Abstract: A lidar system includes a light source to generate a frequency modulated continuous wave (FMCW) signal, and a waveguide splitter to split the FMCW signal into an output signal and a local oscillator (LO) signal. A transmit coupler provides the output signal for transmission. A receive lens obtains a received signal resulting from reflection of the output signal by a target. A waveguide coupler combines the received signal and the LO signal into a first combined signal and a second combined signal. A first phase modulator and second phase modulator respectively adjust a phase of the first combined signal and the second combined signal to provide a first phase modulated signal and a second phase modulated signal to a first photodetector and a second photodetector. A processor processes a first electrical signal and a second electrical signal from the first and second photodetectors to obtain information about the target.

Abstract: A sensor mounting state determination device includes distance measurement section that measures a distance to a road surface based on time from transmission of a transmission wave to reception of a reflection wave by an ultrasonic sensor that is mounted to a vehicle to transmit a transmission wave toward a road surface and receive a reflection wave reflected off the road surface. There is further provided a determination section configured to determine not only that the ultrasonic sensor is correctly mounted when the distance measured by the distance measurement section is identical to a predetermined distance, but also that the ultrasonic sensor is incorrectly mounted when the distance measured by the distance measurement section is not identical to the predetermined distance.

Abstract: In a method for detection of defective ultrasonic transducers in an in ultrasonic sensing device, an ultrasonic signal is generated at an ultrasonic sensing device comprising a plurality of ultrasonic transducers. A reflected ultrasonic signal corresponding to the ultrasonic signal is received at at least one ultrasonic transducer of the plurality of ultrasonic transducers. It is determined whether performance the at least one ultrasonic transducer is degraded based at least in part on the reflected ultrasonic signal.

Abstract: An echo sounding apparatus which is attached to a moving object and detects a measurement target in the water, including: a transmission signal forming unit that generates a pseudo noise sequence signal and forms a transmission signal by modulating a carrier signal by the pseudo noise sequence signal of transmission timing; a transmitting unit that transmits the transmission signal as an ultrasonic wave into the water; a receiving unit that receives a reception signal including a true echo, a ghost of the transmission signal, and a ghost of the reception signal; a correlator that measures a distance to the measurement target based on a time difference between the transmission signal and the true echo by executing a correlating process to the reception signal by the pseudo noise sequence signal; and a ghost eliminating circuit that eliminates the ghost of the transmission signal and/or the ghost of the reception signal.

Abstract: An ultrasound imaging system (100) includes a transducer array (102) with a plurality of transducer elements (106) configured to transmit an ultrasound signal, receive echo signals produced in response to the ultrasound signal interacting with structure, and generate electrical signals indicative of the echo signals. The system further includes a beamformer (112) configured to process the electrical signals and generate radio frequency data, an in-phase quadrature processor (114) configured to process the radio frequency data and generate in-phase quadrature data, and a frame processor (116) configured to envelope detect and log compress the in-phase quadrature data, producing compressed envelope data. The system further includes a time gain compensation controller (120) configured to continuously process the in-phase quadrature data and the compressed envelope data and continuously and automatically apply time gain compensation data to an envelope data image.

Abstract: A method of signal processing for suppressing at least one sidelobe of an autocorrelation function between a received code sequence and a mismatched filter coefficient vector comprises: setting a filter coefficient vector; modifying the filter coefficient vector, thus generating a modified filter coefficient vector; correlating the modified filter coefficient vector with the code sequence yielding an autocorrelation function comprising a main peak and sidelobes; generating a performance parameter that describes the sidelobe suppression of the autocorrelation function; setting the modified filter coefficient vector as the new filter coefficient vector for a subsequent iteration if the performance parameter shows a performance improvement; and discarding the modified filter coefficient vector if the performance parameter shows no performance improvement.

Abstract: A method of detecting an object is disclosed, comprising generating a transmission signal by generating a carrier signal and digitally modulating the carrier signal with a transmission modulation signal, and transmitting the transmission signal. A reflected signal is received, the reflected signal having been reflected from the object, and demodulated to extract a received modulation signal. The received modulation signal is correlated with the transmission modulation signal and a range of the object is determined from the correlation of the received modulation signal and the transmission modulation signal.

Abstract: Methods, apparatus, systems and articles of manufacture are disclosed for distributed, multi-node, low frequency radar systems for degraded visual environments. An example system includes a transmitter to transmit a radar signal. The example system includes a distributed network of radar receivers to receive the radar signal at each receiver. The example system includes a processor to determine a first range and a first angular position of a background point based on return time, wherein the first range and the first angular position are included in first data; determine a second range and a second angular position of the background point based on doppler shift, wherein the second range and the second angular position are included in second data; determine a refined range and a refined angular position, wherein the refined range and refined angular position are included in third data, and generate a radar map based on third data.

Abstract: The present disclosure relates generally to client server communications and processing mechanism for use in a radar unit that can be mounted in a car, e.g. on the dash of the car, and a mobile computer that can be placed in a receptacle mounted, e.g., in the interior along the firewall of the car. The client server communications and processing mechanism enables communications between the units that can be one way, both ways, or a combination of both depending on the type of data needed to be communicated. The communications between the units includes speed tracking data and lock and release data.

Abstract: A sequence of motion observations of a moving object are received from a first set of sensors. A first sequence of distance ratios are calculated based on the first sequence of motion observations. First transects are generated based on the first sequence of distance ratios. A first motion track of the moving object is produced based on: the first transects; and a map. A second set of sensors are determined employing the map. A second sequence of motion observations of the moving object are received from the second set of sensors. A second sequence of distance ratios for second pairs of the second set of sensors based on the second sequence of motion observations. Second transects are generated based on the second sequence of distance ratios. A second motion track is produced based on the first motion track, the second transects, and the map.

Abstract: A method is provided that involves identifying a target region of an environment of an autonomous vehicle to be monitored for presence of moving objects. The method also involves operating a first sensor to obtain a scan of a portion of the environment that includes at least a portion of the target region and an intermediate region between the autonomous vehicle and the target region. The method also involves determining whether a second sensor has a sufficiently clear view of the target region based on at least the scan obtained by the first sensor. The method also involves operating the second sensor to monitor the target region for presence of moving objects based on at least a determination that the second sensor has a sufficiently clear view of the target region. Also provided is an autonomous vehicle configured to perform the method.

Abstract: An ultra-short range radar (USRR) system of a vehicle includes an object detection module configured to, based on radar signals from USRR sensors of the vehicle: identify the presence of an object that is external to the vehicle; determine a location of the object; and determine at least one of a height, a length, and a width of the object. A remedial action module is configured to, based on the location of the object and the at least one dimension of the object, at least one of: selectively actuate an actuator of the vehicle; selectively generate an audible alert via at least one speaker of the vehicle; and selectively generate a visual alert via at least one light emitting device of the vehicle.

Abstract: In an object detection method, a moving speed v0 of a radar device and an angle ?1 defined between a moving direction of the radar device and a reception direction of a radar wave reflected on a target are acquired, a first function which expresses a relative speed v1 between the radar device and the target by the speed v0 and the angle ?1 in a non-multipath environment model and a second function which expresses the speed v1 in a multipath environment model are formed, an actual relative speed between the radar device and the target is calculated from a reception signal of the radar wave by using the multipath environment model, and it is determined that the reception signal is derived from a stationary object when a point defined by the ?1 and the actual relative speed is positioned between the first function and the second function.

Abstract: A system for inspection of watertightness of a vehicle is disclosed. The system includes: a moving unit to move the vehicle to a workspace; a detection unit to detect the vehicle entering the workspace; a plurality of jet nozzles to jet water toward the vehicle; a valve unit to control water supplied to the plurality of jet nozzles; and a controller to control water jetted toward the vehicle by the plurality of jet nozzles, by controlling the valve unit based on a detection signal from the detection unit. In particular, while the vehicle is moved to the workspace for inspection of watertightness, water is injected toward the vehicle when the vehicle is detected to enter the workspace, and the water injection is stopped when the vehicle is not further detected in the workspace.

Abstract: A semi-passive acoustic transponder providing identity information related to the transponder when it is reflecting a received pulsed acoustic signal underwater. The transponder includes a memory unit holding ID-sequence data controlling operation of the switching device, and an electronic circuit includes frequency adjusting means for adjusting the frequency and duration of the switch such that the duration of the ID-sequence data is shorter than the duration of pulses of the received acoustic signal. Additionally, a method and system may provide position and identity information related to one or more of said semi-passive acoustic transponders.

Abstract: An optical proximity sensor arrangement comprises a first sensor unit with a first emitter and a first detector and a second sensor unit with a second emitter and/or a second detector. The first detector is configured to detect light being emitted by the first emitter and, if applicable, by the second emitter, and being at least partially reflected. If applicable, the second detector is configured to detect light being emitted by the first emitter and being at least partially reflected. A distance between the first emitter and the first detector is, if applicable, less than a distance between the first detector and the second emitter and, if applicable, less than a distance between the first emitter and the second detector.

Abstract: An optical projector comprises a collimated light source, a pattern generating optical element, and a variable optical element positioned optically between the collimated light source and the pattern generating optical element. The variable optical element is configured to adjust a divergence of a light beam incident on the pattern generating optical element. The pattern generating optical element is configured to emit patterned light when the variable optical element is in a first state, and to emit non-patterned light when the variable optical element is in a second state.

Abstract: An optical time of flight system includes a transmitter and a receiver. The transmitter is configured to generate a modulation signal having a modulation signal frequency that varies as a function of time, generate an optical waveform with amplitude modulation corresponding to the modulation signal, and direct the optical waveform toward a field of view (FOV). The receiver is configured to receive the optical waveform reflected off of an object within the FOV and determine a distance to the object based on a time of flight from the transmitter to the object and back to the receiver.

Abstract: A chip-scale coherent lidar system includes a master oscillator integrated on a chip to simultaneously provide a signal for transmission and a local oscillator (LO) signal. The system also includes a beam steering device to direct an output signal obtained from the signal for transmission out of the system, and a combiner on the chip to combine the LO signal and a return signal resulting from a reflection of the output signal by a target. One or more photodetectors obtain a result of interference between the LO signal and the return signal to determine information about the target.

Abstract: A lidar system includes a laser diode to provide a frequency modulated continuous wave (FMCW) signal, and a current source to provide a drive signal that modulates the laser diode. The current source is controlled to pre-distort the drive signal to provide a linear FMCW signal. The lidar system also includes a splitter to split the FMCW signal into an output signal and a local oscillator (LO) signal, a transmit coupler to transmit the output signal, a receive coupler to obtain a received signal based on reflection of the output signal by a target, and a combiner to combine the received signal with the LO signal into first and second combined signals. A first and second photodetector respectively receive the first and second combined signals and output first and second electrical signals from which a beat signal that indicates the pre-distortion needed for the drive signal is obtained.

Abstract: The technology disclosed relates to determining positional information of an object in a field of view. In particular, it relates to calculating a distance of the object from a reference such as a sensor including scanning the field of view by selectively illuminating directionally oriented light sources and measuring one or more differences in property of returning light emitted from the light sources and reflected from the object. The property can be intensity or phase difference of the light. It also relates to finding an object in a region of space. In particular, it relates to scanning the region of space with directionally controllable illumination, determining a difference in a property of the illumination received for two or more points in the scanning, and determining positional information of the object based in part upon the points in the scanning corresponding to the difference in the property.

Abstract: A first surveying unit comprises a frame in a horizontally rotatable manner, a telescope unit in a vertically rotatable manner, a first angle measuring unit and a first distance measuring unit which measure a prism, wherein the second surveying unit comprises a scanning mirror which rotatably irradiates a laser beam and a second angle measuring unit which detects a rotation angle of the scanning mirror, wherein a target instrument comprises a pole installed at a measuring point, the prism has a known positional relationship with a lower end of the pole, and a target plate mounted on the pole, wherein an arithmetic control module scans a laser beam, calculates a measuring point direction vector based on point cloud data of the target plate, and calculates a three-dimensional coordinate of the measuring point based on an optical center of the prism, the measuring point direction vector, and the positional relationship.

Abstract: Through discrimination of the scattered signal polarization state, a lidar system measures a distance through semi-transparent media by the reception of single or multiple scattered signals from a scattering medium. Combined and overlapped single or multiple scattered light signals from the medium can be separated by exploiting varying polarization characteristics. This removes the traditional laser and detector pulse width limitations that determine the system's operational bandwidth, translating relative depth measurements into the conditions of two surface timing measurements and achieving sub-pulse width resolution.

Abstract: Included are: a fast Fourier analyzer to obtain a received spectrum for each of time gates by performing fast Fourier transform on a received signal for each of the time gates; a signal integration determiner to determine necessity of integration of the received spectrum obtained by the fast Fourier analyzer for each of the time gates; a spectrum integrator to perform integration of the received spectrum obtained by the fast Fourier analyzer depending on a determination result by the signal integration determiner; a frequency shift calculator to calculate an amount of a frequency shift with respect to the laser light emitted by the optical transceiver from the received spectrum integrated by the spectrum integrator; and a wind speed calculator to calculate the wind speed in a direction in which the laser light is emitted by the optical transceiver from the amount of the frequency shift calculated by the frequency shift calculator.

Abstract: A communications system comprising a master-node and a slave-node. The master-node comprising: a GNSS receiver configured to provide a GNSS based time reference signal; a master-timing-reference-calibrator configured to determine a master-timing-reference-calibration-signal, for calibrating the master reference timing circuit, based on the GNSS based time reference signal; and a master-reference-timing-circuit configured to provide a master-clock-signal based on the master-timing-reference-calibration-signal, wherein the master-clock-signal is a clock signal for the master-node; and a master-transmitter configured to determine a master-communications-signal using the master-clock signal.

Abstract: A GNSS data collection system includes a pole mounted GNSS receiver and inclination sensors. A data collection module provides a data collection graphical user interface (GUI) visible on a hand-held data collector computer. The data collector computer is communicably coupled to the GNSS receiver and receives three-dimensional location data and inclination data for the range pole in real-time. A virtual level component uses the inclination data to display on the GUI real-time tilt information in the form of a virtual bubble level indicator. The inclination data and height of the range pole are used to calculate and display horizontal distance and direction to level the GNSS receiver, using: incline=sqrt(xtilt*xtilt+ytilt*ytilt) where, xtilt=the inclination data for the range pole along the x axis, ytilt=the inclination data for the range pole along the y axis, and horizontaldistancefromlevel=rh*sin(incline) where, rh=the height of the range pole.

Abstract: Satellite navigation device having an architecture which uses, in parallel, an estimator based on scalar tracking and an estimator using vector tracking. As such, it is possible to compare the results given by the two estimators. In the case of a divergence between the two estimators, a study of the divergences makes it possible to determine contamination of the navigator or certain scalar channels and to modify the parameters of the navigator so as to keep a reliable measurement of the position.

Abstract: The dose measurement device includes: a radiation sensor constituted by a light emitting portion that is made of a polycrystalline scintillator and emits light of intensity dependent on an amount of incident radiation and a cover covering the light emitting portion; an optical fiber that is connected to the radiation sensor and transmits the photons emitted by the polycrystalline scintillator; a photoelectric converter for converting the photons transmitted by the optical fiber into electrical signals; a calculation device for measuring each of the electrical signals through the conversion by the photoelectric converter of each photon, calculating a count rate, and specifying a dose rate; and a display device for displaying measurement results calculated by the calculation device.

Abstract: An image generating apparatus for image generation and dose calculation is provided. The image generating apparatus includes a movable detector for detecting nuclear radiation during a detection period and an evaluation system. The evaluation system includes an interface system for transmitting detector data to the evaluation system. The detector data include information about the detected radiation for image generation. The evaluation system further includes a data memory portion for storing the detector data. The evaluation system further includes a program memory portion with a program for repeatedly determining at least one quality value with respect to image generation during the detection period. The image generating apparatus includes an output system including at least one output unit. The at least one output unit includes one output unit for outputting an instruction to a user for further moving the detector in dependence of the detector data.

Abstract: The present invention is directed to systems and methods for producing an improved PSD scintillator by including a cross-linking agent, such as BPA-DM, in the polymer from which the scintillator is machined, and to PSD scintillators produced thereby. The cross-linking agent could also be used for plastic scintillators with significant incorporation of specialized dopants (boron, lead or bismuth) for thermal neutron or gamma radiation detection.

Abstract: A portable radiation image capturing apparatus is provided with a sensor panel in which a plurality of radiation detecting elements are arranged two-dimensionally and a case which is formed with a front plate on a side where radiation enters and a back plate on an opposite side. The sensor panel is stored in the case. The portable radiation image capturing apparatus includes the following. An electronic component is provided on the back plate side of the sensor panel and generates heat when charge generated in the radiation detecting element is read out as a signal value. A heat conductive member is provided between the electronic component and the back plate. The heat conductive member is positioned pressed between the back plate and the electronic component in a state in which the heat conductive member is in close contact with the electronic component and the heat conductive member is in close contact with the back plate.

Abstract: A radiation detector includes a substrate, control lines provided on the substrate and extending in a first direction, data lines provided on the substrate and extending in a second direction crossing the first direction, and detection parts arranged in a matrix. Each detection part includes a thin film transistor and a conversion part converting radiation or light into electricity. Further, a control circuit switches an on state and an off state of each thin film transistor and a signal detection circuit reads out image data in the on state of the thin film transistor. Further, the detector judges a start time of radiation incidence based on a value of the image data read out in the on state of each thin film transistor.

Abstract: An apparatus suitable for detecting X-ray is disclosed. In one example, the apparatus comprises an X-ray absorption layer comprising a first pixel and a second pixel, and a controller. The controller is configured for determining that carriers generated by a single X-ray photon are collected by the first pixel and the second pixel. The controller is also configured for determining energy of the single X-ray photon based on a first voltage detected from the first pixel and a second voltage detected from the second pixel. The first voltage and the second voltage are caused by the single X-ray photon.

Abstract: Disclosed herein are methods and devices for the acquisition of positron emission (or PET) data in the presence of ionizing radiation that causes afterglow of PET detectors. In one variation, the method comprises adjusting a coincidence trigger threshold of the PET detectors during a therapy session. In one variation, the method comprises adjusting a gain factor used in positron emission data acquisition (e.g., a gain factor used to multiply and/or shift the output(s) of a PET detector(s)) during a therapy session. In some variations, a method for acquiring positron emission data during a radiation therapy session comprises suspending communication between the PET detectors and a signal processor of a controller for a predetermined period of time after a radiation pulse has been emitted by the linac.

Abstract: A method, including: obtaining, with a computer, an initial geophysical model; modeling, with a computer, a forward wavefield based on the initial geophysical model with wave equations including a second order z-derivative in a rotated coordinate system that accounts for a tilted transverse isotropic (TTI) medium; modeling, with a computer, an adjoint wavefield with adjoint wave equations including a second order z-derivative in a rotated coordinate system that accounts for a tilted transverse isotropic (TTI) medium, wherein the wave equations and the adjoint wave equations include relaxation terms accounting for anelasticity of earth in an update of a primary variable and an evolution relationship for the relaxation terms; and obtaining, with a computer, a gradient of a cost function based on a combination of a model of the forward wavefield and a model of the adjoint wavefield.

Abstract: The present invention is a method of refining data in fault line models to produce improved focal mechanisms for small seismic events. The invention can be used for monitoring the polarity of small seismic events in real-time (e.g., fracking) as well for interpreting catalogues of past seismic events. The invention transforms ground velocity signals into vectors through a cross correlation function. The values from these vectors are weighted and ranked. The result is input into a 3-D model to enhance interpretation of seismic events and associated faulting geometry.

Abstract: A method is described for removing the surface ghost from and/or separating wave field data and/or for estimating redatuming operators of the wave field data by effective use of a transform that that relies on the non-uniform distribution of distances with respect to a reference surface or of tuned-source radiation directions of sources and or the non-uniform distribution of receivers with respect to a reference surface to partition or map the wave field from at least two different cones in the transformed domain and using the contribution of sources and or receivers inside at least one of the at least two different cones to estimate a first wave field of interest, a second separated or ghost wave field and/or redatuming operator.

Abstract: Methods and systems to separate seismic data associated with impulsive and non-impulsive sources are described. The impulsive and non-impulsive sources may be towed through a body of water by separate survey vessels. Receivers of one or more streamers towed through the body of water above a subterranean formation generate seismic data that represents a reflected wavefield produced by the subterranean formation in response to separate source wavefields generated by simultaneous activation of the impulsive source and the non-impulsive source. Methods and systems include separating the seismic data into impulsive source seismic data associated with the impulsive source and non-impulsive source seismic data associated with the non-impulsive.

Abstract: A system and method for deploying seismic data acquisition equipment from a moving vessel. The system and method utilize movable pulley systems to manipulate a string of data acquisition equipment such that a technician may attach the seismic data acquisition equipment to a rope or cable during a period in which the rope or cable is stationary relative to the vessel. The system and method allow for equipment deployment at a relatively constant rate while the vessel maintains a relatively constant velocity. The system and method for deploying seismic data acquisition equipment allows for enhanced personnel safety and efficient equipment deployment.

Abstract: A system, method, and a computer program configured to perform a method for processing drilling data. The method includes transmitting a signal with a telemetry tool to a computer processor. The method includes applying a plurality of predetermined templates to the signal. The method also includes applying a plurality of first filters to the transmitted signal. The method also includes applying one or more second, adjustable filters to the transmitted signal and to the plurality of predetermined templates. The method also includes decoding the transmitted signal based on the best match between a) two or more of the plurality of predetermined templates, and b) the transmitted signal, wherein the two or more of the plurality of predetermined templates and the transmitted signal are processed through the same adjustable filter of the one or more second, adjustable filters.