Abstract: An active situational sensor achieves SWaP-C and SNR improvements by using a liquid crystal waveguide to steer a spot-beam onto a conical shape of a fixed mirror, which redirects the spot-beam to scan a FOV. The sensor may rapidly scan a 360° horizontal FOV with a specified vertical FOV or any portion thereof, jump discretely between multiple specific objects per frame, vary the dwell time on an object or compensate for other external factors to tailor the scan to a particular application or changing real-time conditions. The sensor can be used to provide object intensity or ranging in complex, dynamic systems such as aviation, air traffic control, ship navigation, unmanned ground vehicles, collision avoidance, object targeting etc.

Abstract: Detection of sunlight as noise is avoided in obtaining point clouds by using a laser scanner. A laser scanner controlling device includes a sun direction calculating unit 115, a brightness measuring unit 116, and a scan condition setting unit 118. The sun direction calculating unit 115 calculates the direction of the sun. The brightness measuring unit 116 measures the brightness of an image that contains the direction of the sun. The scan condition setting unit 118 sets a condition for restricting laser scanning in the direction of the sun when the brightness is not less than a predetermined threshold value.

Abstract: This application relates to capturing an image of a target object using information from a time-of-flight sensor. In one aspect, a method may include a time-of-flight (TOF) system configured to emit light and sense a reflection of the emitted light and may determine a return energy based on the reflection of the emitted light. The method may measure a time between when the light is emitted and when the reflection is sensed and may determine a distance between the target object and the TOF system based on that time. The method may also identify a reflectance of the target object based on the return energy and may determine an exposure level based on a distance between the target object and a reflectance of the target object.

Abstract: An object-tracking system can compute a distance to a target object. During operation, the system can use a radio antenna to receive a first radio signal pattern from a direction of a target object. The system determines a time interval from the received radio signal pattern, and determines a velocity of the local system. The system then computes a distance to the target object based on the time interval and the velocity of the object-tracking device.

Abstract: A system for detecting a target object includes a first detector that detects an object by emitting radio waves and receiving reflected waves that are the emitted radio waves reflected by a target object, a second detector that detects heat generated by the target object, and an information collection apparatus that determines the presence or absence of the target object on the basis of the detected reflected waves and the detected heat, and the information collection apparatus determines the presence of the target object in a case where the first detector has detected a movement of the target object and the second detector has detected the heat.

Abstract: A radar system includes a controller is operable to receive a first signal from a first antenna and a second signal from a second antenna arising from the reflection of the first pulse by an object located in the radar field-of-view. The controller is also operable to calculate, before reception of the reflection of the second pulse by the object is finished, a first transformation of the first signal and the second signal to determine range-data based on the reflection of the first pulse. The range-data includes a phase-component and an amplitude-component. The first transformation is followed by calculate a complex non-coherent integration of the phase-component and the amplitude-component to determine averaged-range-data that includes a Doppler-phase and a Doppler-amplitude.

Abstract: A handheld device, an object positioning method thereof and a computer-readable recording medium are provided. The handheld device includes a radar sensor, an image sensor and a control unit. The radar sensor emits a detection wave, and receives a reflected wave generated by an object by reflecting the detection wave. Each object generates one of the reflected waves. The image sensor captures an image. The image includes a subset of the objects. The control unit extracts a waveform signature of each reflected wave, recognizes the waveform signature in a time domain and a frequency domain to determine a first type of each object, obtains a first position of the object according to the reflected wave, obtains a second type and a second position of each object according to the first image, and performs object mapping to combine or compare the first position and the second position of the object.

Abstract: A method of estimating a reflected wave arrival direction using a radar apparatus includes obtaining a first, reflected signal by performing transmission and/or reception of radio waves using a first directional distribution pattern of sensitivity, obtaining a number of first targets by estimating a number of targets in a reflected wave based on the first reflected signal, obtaining a second reflected signal by performing transmission and/or reception of radio waves using a second directional distribution pattern of sensitivity, obtaining a number of second targets by estimating a number of targets in the reflected wave based on the second reflected signal, obtaining a third reflected signal by performing transmission and/or reception of radio waves using a third directional distribution pattern of sensitivity, obtaining a number of third targets by estimating a number of targets in the reflected wave based on the third reflected signal, and estimating the number of targets and the direction of presence of th

Abstract: The signal processing device processes a sensor signal from a radio wave sensor. The parameter adjuster changes a parameter for adjusting detection sensitivity of an object for a recognition process. The parameter adjuster sets the parameter to increase the detection sensitivity of the object when the sensitivity level set by the level setter is a high level, and sets the parameter to decrease the detection sensitivity of the object when the sensitivity level set by the level setter is a low level.

Abstract: A tracking device estimates a track for at least one possible target and is configured to receive incoming measurements and process measurements and tracks. The device has a storage device and a computational device and an association module to calculate an association between a measurement and a track. The device further has an output module to output a sequence of track updates from an assignment module maintaining a set of active tracks using the association module as a function of active tracks and the incoming measurements to calculate associations, containing possible track updates and deciding which track updates to keep in the active tracks set and which to add to a passive tracks set. Computations on the passive tracks may be deferred until at least one passive track handling criterion is fulfilled. The computational device may activate and transfer a passive track from the passive set to the active set.

Abstract: Sonar systems and associated methods are provided herein for sonar image generation. The sonar system is configured to enable rotation of a transducer array that includes at least two transducer elements. The transducer array may be mounted to a trolling motor capable of being rotated. The transducer elements can be positioned to enable use of interferometry to obtain angle information regarding sonar returns. The angle and range of each sonar return can be used to form images, such as a 2D forward looking image of the underwater environment. A heading detector can be used to obtain a heading of the transducer elements to enable creation of a 2D radar-like image of the underwater environment. Additionally, the heading, angle, and range of the sonar returns can be used to form a 3D image of the underwater environment.

Abstract: An ultrasound imaging system is provided. The ultrasound imaging system includes an ultrasound transducer configured to acquire ultrasound imaging information including an ultrasound data sample. The ultrasound imaging system includes a processing circuit configured to receive the ultrasound imaging information and applying a combining function to the ultrasound imaging information based on a characteristic of the ultrasound imaging information, in order to combine the ultrasound imaging information into at least one spectral Doppler line. The combining function improves an image quality of an image displayed based on the at least one spectral Doppler line.

Abstract: A photoelectric sensor includes the following components. A disturbance detection unit detects a disturbance by comparing a light reception result obtained by a light receiver with a first threshold and with a second threshold for a predetermined period in a state where no light is transmitted by a light transmitter. The second threshold takes a value of a sign opposite to that of the first threshold relative to a no-signal state. A waiting unit waits for the light reception result obtained by the light receiver to become within a range from the first threshold to the second threshold upon detection of a disturbance. A disturbance type determination unit causes detection of a disturbance to be performed again after the waiting. A light transmission instruction unit instructs the light transmitter to transmit light when no disturbance is detected for a predetermined period.

Abstract: A laser range finding apparatus includes a light emitting section that emits a laser light, a light receiving section that receives the reflected laser light from a detection object, the light receiving section including a plurality of photo detectors for respectively receiving a plurality of different transmission wavelength bands of the laser light, an identifying section that identifies each of the photo detectors each of whose output indicating signal waveforms of the received reflected laser light is not saturated as an unsaturated photo detector, and a distance calculating section that calculates a distance to the detection object based on a light detection timing at which the reflected laser light is received by the unsaturated photo detector.

Abstract: A device for extracting depth information, according to one embodiment of the present invention, comprises: a light output unit for outputting infrared (IR) light; a light adjustment unit for adjusting an angle of the light outputted from the light output unit such that the light scans a first region including an object, and then adjusting the angle of the light such that the light scans a second region, which is a portion of the first region; a light input unit in which the light outputted from the light output unit and reflected from the object is inputted; and a control unit for extracting depth information of the second region by using the flight time taken up until the light outputted from the light output unit is inputted into the light input unit after being scanned to and reflected from the second region.

Abstract: High-resolution laser range finding using frequency-modulated pulse compression techniques can be accomplished using inexpensive semiconductor laser diodes. Modern applications of laser range finding often seek to maximize the distance over which they can resolve range together with the range resolution and to minimize the pulse duration in order to acquire more data in less time. The combination of these requirements results in increasing bandwidth requirements for processing the ranging data, which can exceed 10 GHz over ranges of tens of meters, depending on the range resolution and pulse duration. Here we describe a method of compressing this range data bandwidth in real time using low-cost components and simple techniques that require no increase in processing time or resources.

Abstract: Techniques are described herein that are capable of forming a depth map and/or projecting an image onto object(s) based on the depth map. A depth map is a three-dimensional representation of an environment. Forming the depth map may utilize a progressive resolution refinement technique. For example, locating information may be determined in accordance with the progressive resolution refinement technique in response to performing a scan of a current point over a field of view. The current point is a point, selected from a plurality of points (e.g., a grid of points) in the field of view, to which a detection beam of light is directed at a respective time as the scan is performed over the field of view. In accordance with this example, the locating information may be coordinated with the scan to form the depth map.

Abstract: An apparatus for capturing superimposed distance and intensity images includes a distance image measuring arrangement provided with a distance radiation source, an intensity radiation source, a distance detection unit and an intensity detection unit. Distance measurement radiation from the distance radiation source and intensity measurement radiation from the intensity radiation source are incident on an area of a surface of a test object via a jointly used radiation deflection unit. The optical components of the distance image measuring arrangement and the intensity image measuring arrangement are mounted on a support structure in a fixed spatial relationship with respect to each other. Distance and intensity images are thus superimposed in an optically positionally accurate manner to produce high-quality real-time images.

Abstract: Laser 3D imaging techniques include splitting a laser temporally-modulated waveform of bandwidth B and duration D from a laser source into a reference beam and a target beam and directing the target beam onto a target. First data is collected, which indicates amplitude and phase of light relative to the reference beam received at each of a plurality of different times during a duration D at each optical detector of an array of one or more optical detectors perpendicular to the target beam. Steps are repeated for multiple sampling conditions, and the first data for the multiple sampling conditions are synthesized to form one or more synthesized sets. A 3D Fourier transform of each synthesized set forms a digital model of the target for each synthesized set with a down-range resolution based on the bandwidth B.

Abstract: A method and system are provided. A first request for satellite navigation data is provided to a vehicle to everything V2X receiver. Satellite navigation data recovered from a V2X message is received from the V2X receiver. The satellite navigation data is provided to a satellite navigation system receiver. The satellite navigation data comprises the data required by the satellite navigation system receiver to perform a hot start.

Abstract: A system to detect spoofing attacks is provided. The system includes a satellite-motion-and-receiver-clock-correction module, a compute-predicted-range-and-delta-range module, a subtractor, and delta-range-difference-detection logic. The satellite-motion-and-receiver-clock-correction module periodically inputs, from a global navigation satellite system (GNSS) receiver, a carrier phase range for a plurality of satellites. The satellite-motion-and-receiver-clock-correction module outputs a corrected-delta-carrier-phase range for a current epoch to a first input of a subtractor. The compute-predicted-range-and-delta-range module outputs a predicted delta range to a second input of the subtractor. The predicted delta range is based on inertial measurements observed for the current epoch. The subtractor outputs a difference between the corrected-delta-carrier-phase range and the predicted delta range for the current epoch to delta-range-difference-detection logic.

Abstract: A GNSS receiver comprising a circuit configured to receive a positioning signal comprising a carrier modulated by a subcarrier and a PRN code; a subcarrier and code tracking loop, comprising a first discrimination circuit, configured to calculate a first pseudo range from said received positioning signal and a first reference signal; a code tracking loop, comprising a second discrimination circuit, configured to calculate a second pseudo range from said received positioning signal and a second reference signal; and a calculation circuit configured to evaluate a difference between said first pseudo range and said second pseudo range, and to modify the output of the first discrimination circuit accordingly. The invention further addresses a method for calculating a pseudo-range in such a GNSS receiver.

Abstract: A method for determining an image rejection characteristic of a receiver within a transceiver is provided. The transceiver uses a common local oscillator. The method includes generating a test signal having a spectral peak and generating a local oscillator signal comprising a frequency with an offset from a center frequency of the spectral peak. Further, the method includes down-mixing the test signal in the receiver using the local oscillator signal to generate a down-mixed signal. The method further includes calculating a first value of a signal characteristic of the down-mixed signal in a first frequency range corresponding to a desired signal component of the down-mixed signal and calculating a second value of the signal characteristic of the down-mixed signal in a second frequency range corresponding to an undesired signal component of the down-mixed signal. Further, the method includes comparing the first value and the second value to generate the image rejection characteristic.

Abstract: A GNSS receiver and the associated method, for calculating an unbiased position and time measurement from a plurality of satellite positioning signals, the receiver comprising: a plurality of circuits configured to receive positioning signals from a plurality of satellites in GNSS constellations, a plurality of first and second signal processing channels configured for processing a first selection of said positioning signals and determining associated first pseudo ranges, a computer logic, wherein: the computer logic is configured to calculate the unbiased position and time measurement from pseudo ranges being determined from positioning signals originating from distinct satellites. A GNSS receiver further comprising a second computer logic configured to calculate a second unbiased position and time from the first position and time, and the second signal processing signals.

Abstract: The invention relates to generating correction information to be used to correct observations coming from a navigation satellite system (NSS) receiver in a region of interest. For each of a plurality of reference stations in said region, raw observations obtained by the reference station observing NSS multiple-frequency signals from a plurality of satellites over multiple epochs are received. Then, precise satellite information on the orbit position, clock offset, and biases of each satellite is obtained. For each reference station, ambiguities in the carrier phase of the received raw observations are estimated, using the precise satellite information and the position coordinates of the reference station. Geometric-free phase linear combination values are then computed based on the received raw observations together with the estimated ambiguities. The correction information is generated based on the computed geometric-free phase linear combination values.

Abstract: The system provides a global navigation satellite system (GNSS) receiver in a vehicle including a radio frequency (RF) receiving circuit for receiving GNSS signals from a plurality of GNSS satellites orbiting Earth at different elevations, and a processor. The processor is configured to calculate a first signal to noise ratio (SNR) for a first GNSS satellite, calculate a second SNR for a second GNSS satellite, monitor a relative change in the first SNR with respect to the second SNR over time, determine that the GNSS receiver has entered a parking garage based on the relative change in the first SNR with respect to the second SNR, in response to this determination, restrict a positioning algorithm to estimate the position of the vehicle upon the vehicle exiting the parking garage to be within a specified range of a known position of an entrance of the parking garage.

Abstract: Systems and methods for improved Global Positioning System (“GPS”) function employ two multiband, multiport antennas to receive GPS signals. The antennas also serve WiFi frequencies, and the system utilizes the received WiFi signal strength to correct the GPS reception pattern for detuning due to user contact or other factors. The correction is made via selective combination of the GPS signals from the antennas. In addition, a phase shifter in one of the signal paths is used to account for changes in device orientation and to maximize the upper hemisphere component of the GPS reception pattern.

Abstract: A tracking module processes the determined correlations to track a carrier of the received composite signal for estimation of a change in phase over a time period between a receiver antenna and one or more satellite transmitters that transmit the received signal as the receiver changes position with respect to an initial position during the time period. A relative position estimator estimates the relative position of the navigation receiver with respect to an initial position over the time period time by time-differencing of the phase measurements of the one or more tracked carrier signals. Bias estimators can estimate or compensate for errors in initial position and temporal changes in receiver clock and tropospheric delay.

Abstract: A radiation imaging apparatus that includes a plurality of sensors and a control unit, wherein the control unit performs a first control of monitoring, after a radiation irradiation is started, a signal of a first sensor and accumulating the monitored signal of the first sensor, a second control of outputting, in response to a calculated value obtained by the accumulation and reaching a target value, a control signal to end the radiation irradiation, and a third control of reading out, after the radiation irradiation is ended, the signals of the respective plurality of sensors, and the control unit changes a monitoring cycle of the first control based on the target value and an elapsed time since the radiation irradiation has been started.

Abstract: An imaging apparatus for an image intensifier (II) X-ray system includes a camera lens assembly (CLA) configured to cooperate with the II to create an X-ray image, the CLA including an image sensor and a lens. The image sensor is configured to convert received light and generate a digital image. The lens is configured to guide the light from the output surface to the image sensor, the lens having a fixed diaphragm. The CLA includes a diaphragm and/or neutral density filter with a fixed attenuation. A controller is configured to control an amount of amplification of the electric signals or the digital image. The sensor, e.g. CMOS sensor, is configured to amplify the analog electric signals before conversion into the digital image according to an analog gain, and the controller is configured to control the amount of amplification by controlling the analog gain applied by the image sensor.

Abstract: A method, system and/or apparatus for remotely monitoring the operation of a radiation sensor may include a radiation sensor configured to detect a presence of radiation in the area, the radiation sensor including a Geiger-Muller tube, a test signal generator configured to generate a high frequency test signal used to test the radiation sensor, the high frequency test signal transmitted to the radiation sensor, and a test signal detector configured to detect a response of the radiation sensor to the test signal, and determine whether the radiation sensor is operating correctly.

Abstract: An apparatus for reading out x-ray information stored in a storage phosphor plate includes an input device having a slot through which a cassette is inserted into the input device, the cassette configured to accommodate a storage phosphor plate, therein, and a read-out device that irradiates the storage phosphor plate with stimulation light and detecting emission light stimulated by the phosphor plate. The input device receives cassettes having different cassette widths, and the input device includes one or more first elements that align and/or fix the cassettes having different cassette widths in the input device, and/or one or more second elements that close the slot of the input device in order to prevent ambient light from passing through the slot when cassettes having different cassette widths are inserted into the input device.

Abstract: According to an embodiment, a signal processor includes an integrator, a differentiator, a zero cross detector, a pile-up detector, an event interval detector, a counter, and a creator. The integrator is configured to calculate charge of current from a photoelectric converter for an incident radiation. The differentiator is configured to calculate a differential value of the current. The zero cross detector is configured to detect a zero cross of the differential value. The pile-up detector is configured to detect pile-up of the current based on the zero cross. The event interval detector is configured to detect, based on the zero cross and pile-up, an event interval of the radiation entering. The counter is configured to count, based on the charge and pile-up, the respective numbers of events according to the charge and the event interval. The creator is configured to create histograms for the numbers of events.

Abstract: According to an embodiment, a radiation detector comprises a photoelectric conversion substrate and a scintillator layer. The photoelectric conversion substrate converts light into an electrical signal. The scintillator layer contacts the photoelectric conversion substrate and converts radiation incident from the outside into light. The scintillator layer is a fluorescer of CsI containing Tl as an activator. The CsI is a halide. The concentration of the activator inside the fluorescer is 1.6 mass %±0.4 mass %. The concentration of the activator inside the fluorescer in an in-plane direction of the scintillator layer has the relationship of central portion>peripheral portion. The central portion is a central region of a formation region of the scintillator layer. The peripheral portion is an outer circumferential region of the formation region of the scintillator layer.

Abstract: The present disclosure relates to an X-ray detector which includes a pixel unit configured to include a photodiode and to output a voltage corresponding to an incident amount of X-rays, a comparator configured to compare the output voltage of the pixel unit with a preset threshold voltage to output a logic signal, and a counter configured to count the output signal of the comparator to convert to a digital output.

Abstract: The objective of the present invention is to effectively improve an image lag phenomenon of a direct conversion detector. The present invention provides an X-ray detector comprising: a lower electrode, formed on a substrate, to which a first driving voltage V1 is applied; an auxiliary electrode, around the lower electrode, to which a third driving voltage V3 is applied; a photoconductive layer formed on the lower electrode and the auxiliary electrode; and an upper electrode, formed on the photoconductive layer, to which a second driving voltage V2 is applied, wherein the third driving voltage V3, right after the radiation of the X-rays is off, is a reverse bias voltage.

Abstract: The present invention relates to a detection device (6) for detecting photons emitted by a radiation source (2). The detection device (6) is configured to detect the photons during a first time period. The detection device (6) comprises a sensor (10) having an intermediate direct conversion material for converting photons into electrons and holes, a shaping element (20), and a compensation unit (450, INT, 950). The compensation unit (450, INT, 950) is adapted to provide a compensation signal based on the electrical pulse and on a photoconductive gain of said sensor (10). The core of the invention is to provide circuits to reduce artifacts due to inherent errors with direct conversion detectors in spectral computed tomography by determining a compensation current, by detecting or monitoring a baseline restorer feedback signal, or by ignoring signals above the baseline level.

Abstract: The present disclosure relates to a readout circuit of an X-ray detector which includes a data line capacitor to store an electrical signal output from a pixel, an amplifier to amplify the electrical signal from the pixel, and a variable current load connected to an output terminal of the pixel.

Abstract: A muon tracker includes a drift tube detector having a plurality of drift tube arrays, a detection time-difference calculation circuit configured to calculate a detected time-difference between a plurality of time data detected at least two of the drift tubes, a time-difference information database that stores a relationship between a plurality of predetermined tracks of the muon passing the drift tube detector and a predetermined time-difference of possible detected time data to be detected at least two of the drift tubes where each of the plurality of predetermined tracks passes, a time-difference referring circuit configured to refer the detected time-difference calculated at the detection time-difference calculation circuit with the predetermined time-difference stored in the time-difference information database, and a muon track determining circuit configured to determine a muon track as the predetermined track of the muon corresponding to the predetermined time-difference that matches the best with the

Abstract: Provided are an X-ray data processing apparatus and a method and a program therefor which can eliminate the influence of the phenomenon that the statistical variation of a count value after distribution is estimated differently from that at another position and can prevent the influence of correction from remaining. An X-ray data processing apparatus 200 that corrects the count value of X-ray intensity detected by a pixel array type detector includes a storage unit 220 to store a correspondence relationship of the shape and the position of a virtual pixel with respect to the shape and the position of an actual pixel, and a distribution unit 260 to distribute the count value of the actual pixel to the virtual pixel using a correspondence relationship in which randomness is provided to the stored correspondence relationship, and outputs the count value distributed to the virtual pixel as a correction result.

Abstract: The X-ray data processing apparatus to estimate a true value from an X-ray count value detected by the pixel array X-ray detector of a photon counting system includes a management unit 210 to receive and manage a detection value for each detection part, an effective area ratio calculation unit 230 to calculate a ratio of a detection ability under the influence of the charge share to an original detection ability in the detection part as an effective area ratio of the detection part using data regarding the detection part and data regarding an X-ray source and a detection energy threshold value, and a correction unit 250 to correct the managed count value using the calculated effective area ratio to estimate a true value.

Abstract: A system can include a head connector, a stress member connector, and a tail connector. The system can include a first plurality of stress members coupled to the head connector and to the stress member connector. The first plurality of stress members can enter through a first side of the stress member connector. The system can include a second plurality of stress members coupled to the tail connector and to the stress member connector. The second plurality of stress members can exit through a second side of the stress member connector. The second plurality of stress members can be axially nonaligned with the first plurality of stress member connectors.

Abstract: A system and method for identifying S-wave refractions using supervirtual refraction interferometry is disclosed. The method includes receiving a seismic data set from data generated by a plurality of receivers, and calculating crosscorrelations of pairs of common receiver gathers from the seismic data set for each of the receivers. The method includes summing the crosscorrelations associated with each of a plurality of virtual ray paths, calculating a plurality of virtual refraction gathers of the summed crosscorrelations and convolving each of the virtual refraction gathers with the seismic data set. The virtual ray paths are based on each of the receivers functioning as a virtual source. The method includes summing the plurality of convolutions associated with each of the virtual ray paths and calculating a supervirtual refraction gather of the summed convolutions. The method further includes outputting the S-wave refraction from the supervirtual refraction gather.

Abstract: Embodiments of methods of identifying structural traps are disclosed herein. Embodiments of the disclosed method use an alternative approach to boundary value problem solvers, based on simple mathematical geometry adapted to the nature of the acquired data. Embodiments of the method rely on digital elevation model type of data (i.e. any given subsurface horizon has only single elevation data values). The disclosed methods allow for a significant algorithm speed-up in identifying structural traps especially when handling large and high density datasets which was heretofore not possible with existing methods.

Abstract: A method to select a representative subset of a plurality of horizon surfaces or surface patches from geophysical subsurface imaging data, including: defining a score function on one or more horizon surfaces or surface patches; calculating, by a computer, the score for each of the plurality of horizon surfaces or surface patches with regard to other horizon surfaces or surface patches and whether the other horizon surfaces or surface patches have been selected or not for inclusion or exclusion in the subset of the plurality of horizon surfaces; selecting, by a computer, one or more of the plurality of horizon surfaces or surface patches to be included in the subset of the plurality of horizon surfaces or surface patches or excluded from the subset of the plurality of horizon surfaces or surface patches based on their respective scores; iteratively repeating the selecting and calculating steps until a stopping condition is reached and the subset of the plurality of horizon surfaces or surface patches is determ

Abstract: Desirable completion zones can be identified using closure stress in combination with one or more other attributes such as porosity. One computer-based well placement method includes using the computer to: process a seismic data volume to map the spatial distribution of a seismic-based CSS attribute; acquire logs from one or more boreholes in the subsurface region; derive from the logs a relationship between CSS and a minimum in-situ stress; apply the relationship to the CSS attribute map to produce a landing map that highlights desirable completion zones; and place one or more wells in the desirable completion zones. The borehole logs may include direct measurements of minimum in-situ stress (acquired via microfracture testing), sonic tool measurements of P-wave and S-wave velocity, and density tool measurements of bulk formation density.

Abstract: The instant invention is designed to provide an adaptive approach to removing short-period time/phase distortions within a downward-continuation process that is a key component of seismic migration algorithms Using techniques analogous to residual statics corrections that are used in standard seismic processing, one inventive approach estimates and removes the effects of short wavelength velocity disruptions, thereby creating clearer seismic images of the subsurface of the earth. Additionally, the instant method will provide an updated velocity model that can be used to obtain further image improvement.

Abstract: At least some embodiments are directed to a system. The system includes a processor and a memory coupled to the processor. The memory stores a program that, when executed by the processor, causes the processor to calculate a pressure response of a first sensor, and correct pressure wavefield data obtained from the first sensor responsive to a first acoustic wavefield. The correction is based on the calculated pressure response of the first sensor. The pressure response of the first sensor is responsive to a second acoustic wavefield having a propagation path between a source of the second acoustic wavefield and the first sensor, in which the propagation path includes no reflection from a subsurface formation.

Abstract: Embodiments of systems and methods for storing and handling a plurality of autonomous seismic nodes are presented. The node handling and storage system may be coupled to a node deployment system that deploys and/or retrieves nodes from water from the back deck of a marine vessel. One embodiment of the node handling and storage system includes a plurality of portable containers that may be assembled in a variety of configurations based on the vessel and survey requirements. The containers are coupled to an autonomous or semi-autonomous node conveyor and/or transport system that moves the nodes between and within the containers for node cleaning, downloading, charging, servicing, and storage. The conveyor system may include a plurality of different transport devices and/or systems, such as rotatable conveyors, lateral conveyors, lift mechanisms, and elevators.

Abstract: Obscured feature detectors and methods of detecting obscured features are disclosed. An obscured feature detector can include a plurality of sensor plates. Each of the sensor plates can have an equivalent primary sensing field zone and a capacitance that varies based on the dielectric constant of the materials that compose the surrounding objects and the proximity of those objects. A sensing circuit is coupled to the sensor plates to measure the capacitances of the sensor plates. A controller is coupled to the sensing circuit to analyze the capacitances measured by the sensing circuit. One or a plurality of indicators are coupled to the controller, and can be selectively set to identify a location of an obscured feature behind a surface.