An electromagnetic wave imaging method, system, and apparatus are provided. The method includes collecting an electromagnetic echo signal, where the electromagnetic echo signal is used to indicate electromagnetic wave scattering feature information of a target object, obtaining location information of a reception point of the electromagnetic echo signal, where the location information indicates relative location information between the reception point and a positioning label, and performing electromagnetic wave imaging on the target object based on the electromagnetic wave scattering feature information and the location informati

An interrogator and system employing the same. In one embodiment, the interrogator includes a receiver configured to receive a return signal from a tag and a sensing module configured to provide a time associated with the return signal. The interrogator also includes a processor configured to employ synthetic aperture radar processing on the return signal in accordance with the time to locate a position of the tag.

Various embodiments of the present technology relate to system, methods, and devices for capturing, processing, and rendering synthetic aperture radar data captured by a radar-based imaging system on graphical processing units based on a hive-cell mapping using a tessellation of a Goldberg polyhedron. In some embodiments, SAR data is produced by a radar-based imaging system. A computing apparatus receives the SAR data and associates at least a portion of the SAR data to one or more cells of a Goldberg polyhedron that covers the globe in approximately equally sized hexagonal or pentagonal cells based at least on a location of the SAR data. The computing apparatus provides the portion of the SAR data associated with one or more cells of the Goldberg polyhedron to one or more GPUs, and then processes the SAR data on each of the one or more GPUs to construct images from the SAR data.

Various embodiments of the present technology generally relate to systems, methods, and computer-readable media for simulating synthetic aperture radar (SAR) images to be captured by a radar-based imaging system. SAR technology can be used to capture large areas on Earth, from a satellite in space for example, over a single pass. A further pass over the target area can help identify changes in the landscape, scenery, and/or infrastructure providing insight on change detection, temporal analysis, or other measures; however, repeat passes over the target area may have been made from differing angles resulting in artifacts in one or both of the processed images from the two passes. In various embodiments, information about the topology of the target area, and information about the SAR platform's flight path are used to simulate the slant range distortion effects that are to be expected in the SAR image of for that pass.

Disclosed are a method and apparatus for processing source data of a synthetic aperture radar in a satellite, including receiving source data generated based on a signal returned after an electronic device steers a beam from a synthetic aperture radar and backscatters, setting a plurality of subswaths after the electronic device parses the source data, storing based on the plurality of subswaths after the electronic device decodes the source data; and generating image data after the electronic device calls the decoded source data in the order of the plurality of sub swaths.

Examples of imaging systems are described herein which may implement microwave or millimeter wave imaging systems. Examples described may implement partitioned inverse techniques which may construct and invert a measurement matrix to be used to provide multiple estimates of reflectivity values associated with a scene. The processing may be partitioned in accordance with a relative position of the antenna system and/or a particular beamwidth of an antenna. Examples described herein may perform an enhanced resolution mode of imaging which may steer beams at multiple angles for each measurement position.

Various embodiments of the present technology generally relate to detecting and manipulating radar image data. More specifically, some embodiments relate to systems, methods, and computer-readable storage media for detecting, processing, viewing, and manipulating radar images in an image viewer application. Radar image data captured by a radar imaging system, such as a synthetic aperture radar (SAR) or other satellite-based equipment, comprises data unreadable by image viewers. In an implementation, an open-source plug-in for an image viewer application obtains SAR data, performs one or more algorithms on the SAR data to detect an image, and provides the detected image to an image viewer for display on a graphical user interface. Further, requests for manipulation of the detected image made by the image viewer application may be performed by the plug-in and exported in complex data formats for use downstream.

A radar antenna for a flight vehicle that follows a flight path comprises a radio frequency (RF) reflector, and separated first arrays of first RF feed elements to form, with the reflector, respective first fixed radar beams that are directed at the Earth and positionally offset with respect to each other, such that when the radar antenna follows the flight path, the respective first fixed radar beams trace respective first subswaths on the Earth that are separated from each other by respective subswath gaps.

The synthetic aperture radar image processing device includes time-series analysis unit which extracts persistent scatterers from time-series observation data for the observation direction for an observation area observed from multiple observation directions by a radar, and calculating displacement speeds of the extracted persistent scatterers, clustering unit which generates reflection point clusters by clustering extracted persistent scatterers based on their phase and position, distance calculation unit which calculates a distance between each of the persistent scatterers included in the reflection point clusters and each structure included in the observation area, representative value calculation unit which calculates each representative value for the distance between each persistent scatterer and each structure, for each reflection point cluster, and corresponding structure determination unit which associates the structure corresponding to the smallest representative value with the persistent scatterer, for each reflection point cluster.

An example autonomous or remotely piloted aircraft includes a virtual aperture radar system including a plurality of antennas relationally positioned on one or more surfaces of the aircraft such that individual beams from each of the plurality of antennas scan respective volumes around the aircraft and the respective volumes together substantially form an ellipsoidal field of regard around the aircraft, and a computing device having one or more processors configured to execute instructions stored in memory for performing functions of: combining the respective volumes together to form an image representative of the ellipsoidal field of regard around the aircraft, and identifying one or more objects within the image.