摘要:
A reflector is used to reflect a radar beam emitted by an airborne or spaceborne source, such as a SAR satellite. The reflector includes a reflecting assembly for reflecting the beam back to the source, and a single linear translator configured to translate the reflecting assembly as a whole.
摘要:
The present disclosure relates to the field of remote sensing data processing, and in particular to a fusion method for multimodal data based on dedicated and shared architecture. The method includes: obtaining multiple pieces of initial remote sensing data of a region of interest, performing data correction processing using a dedicated network to generate intermediate remote sensing data, obtaining a confidence value using a shared feature association network, performing replacement processing based on the confidence value to generate sub fused remote sensing data, and generating fused remote sensing data of the region of interest based on all pieces of sub fused remote sensing data and modal weights. With the present disclosure, data correction processing is performed on each of the pieces of initial remote sensing data and fusion processing is performed on the remote sensing data having different modal types, any combination of modal remote sensing data can be used, and fused remote sensing data with higher richness and accuracy in representing the ground feature information is generated, improving the availability of the fused remote sensing data to facilitate the fused remote sensing data adapting to various remote sensing interpretation tasks, and improving the efficiency of earth observation.
摘要:
A system and a method may detect underground water or gas leakage. The method may include receiving a first scan of an area including an underground gas pipe at a first polarization, the first scan including first microwave reflections of the area at a wavelength range of 3.8 cm to 1.3 m; receiving additional data, filtering electromagnetic noise from the first scan using the additional data; creating a water roughness map based on typical roughness values of a set of types of water sources and the filtered first scan; identifying one or more water accumulations at one or more locations along the gas pipe using the water roughness map and the filtered first scan and calculating the water content at the one or more locations along the gas pipe based on the identified one or more water accumulations.
摘要:
A multi-mode phased array antenna ("MPAA") is disclosed. The MPAA has at least two modes of operation, where a first mode of operation produces a first main-beam and a second mode of operation produces a second beam. The MPAA includes a plurality of radiating elements arranged as an array of radiating elements and a controller in signal communication with the plurality of radiating elements. The controller is configured to excite the plurality of radiating elements to produce a first radiation pattern having the first main-beam in the first mode of operation and a second radiation pattern having the second beam in the second mode of operation. The second beam is wider than the first main-beam and the second radiation pattern is similar to a radiation pattern for a single radiating element of the plurality of radiating elements. The controller also switches between the first mode and second mode of operation.
摘要:
An embodiment of a method for processing synthetic aperture radar (SAR) image data includes acquiring a multi-polarization SAR image of a terrestrial region, pre-processing the SAR image to remove or reduce radiometric and geometric errors, and separating the SAR image into a plurality of channels, each channel representing an image associated with a different polarization mode. The method also includes calculating a characteristic of the region for each polarization channel, acquiring ground data and estimating the characteristic of the region based on the ground data, estimating a correlation of the calculated characteristic for each polarization channel with the estimated characteristic based on the ground data, selecting one or more polarization channels having a correlation exceeding a selected value, and generating a SAR image including only the selected polarization channels based on the comparison.
摘要:
The invention relates to an imaging device (1) to be incorporated into a mobile carrier. Said imaging device (1) comprises a multisensor support panel (4) comprising a radiation surface comprising a plurality of radiating elements forming an antenna array, said radiating elements being associated with a radiofrequency module (24) allowing a radar function to be performed, and a plurality of optical sensors positioned on said multisensor support panel (4) and distributed between the radiating elements according to a pre-determined mode of distribution, said optical sensors being able to supply digital images.
摘要:
Disclosed is a real-time elevation DBF processing method, which includes: weighting and summing processing is performed on an intermediate frequency signal obtained from sampling made on each channel to obtain two channels of combined intermediate frequency signals; frequency mixing-based orthogonal demodulation is performed on signals in real number field of the two channels of combined intermediate frequency signals respectively; and cross summation is performed on two channels of demodulated intermediate frequency signals and resulting signals are low-pass filtered. Further disclosed is a real-time elevation DBF processing device.
摘要:
The present disclosure relates to a method (100) for rendering a simulated Synthetic Aperture Radar, SAR, image. The method comprises providing (110) a digital surface model or the like comprising 3D coordinate data in a geo-referenced coordinate system, determining (120) a sub-section of the digital surface model, and obtaining (130) the simulated SAR image based on the subsection of the digital surface model, wherein substantially each point in the simulated SAR image being associated to a 3D coordinate in the geo-referenced coordinate system.