- 标题
- 摘要
- 关键词
- 实验方案
- 产品
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[IEEE IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium - Valencia (2018.7.22-2018.7.27)] IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium - A CubeSat Train for Radar Sounding and Imaging of Antarctic Ice Sheet
摘要： In spite of more than 50 years of airborne radar soundings of Antarctic ice by the international community, there are still large gaps in ice thickness data. We propose a CubeSat satellite mission for complete sounding and imaging of Antarctica with 50 CubeSats integrated with a VHF radar system to sound the ice and image the ice-bed. One of the major challenges in orbital sounding of ice is off-vertical surface clutter that masks weak ice-bed echoes. We must obtain fine resolution both in the along track and cross track directions to reduce surface clutter. We can obtain fine resolution in the along track direction by synthesizing a large aperture by taking advantage of the forward motion of a satellite. However, we need a large antenna-array to obtain fine resolution in the cross track direction. We propose a train of 50 CubeSats with optimized offset position to obtain a 500-m long aperture and also coherently combine data from multiple passes of the train to obtain a very large aperture of 1-2 km in the cross track direction. Our initial analysis shows that we can obtain measurements with horizontal resolution of about 200 m and vertical resolution of about 20 m. The CubeSat will carry a transmitter and receiver with peak transmit power of about 50 W. We will synchronize all transmitters and receivers with a Ka-band system that serves as a communication link between the earth and Cubesats to downlink data and as command and control for the CubeSats.
关键词： cryosphere,imaging,CubeSat,Satellite formation,Antarctica,sounding
更新于2025-09-23 15:23:52
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[IEEE IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium - Valencia, Spain (2018.7.22-2018.7.27)] IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium - 3Cat-4: Combined GNSS-R, L-Band Radiometer with RFI Mitigation, and AIS Receiver for a I-Unit Cubesat Based on Software Defined Radio
摘要： The 3Cat-4 mission aims to demonstrate the capabilities of nano-satellites plus the versatility of a Software Defined Radio for passive Earth Observation. Three different microwave payloads are integrated into a single unit CubeSat platform: a multi-constellation (GPS and Galileo) and a dual-band (L1 and L2) Global Navigation Satellite System-Reflectometer receiver, a total power radiometer including a novel Radio Frequency Interference (RFI) detection and mitigation technique, and an Automatic Identification System receiver for vessels tracking. Being able to validate these technologies in a CubeSat enables their fast adoption as hosted payloads or in more performing dedicated platforms in the future. This paper shows a novel approach for embedding multiple passive microwave payloads in a single platform.
关键词： GNSS-R,RFI,AIS,Nano-satellite,Radiometry,CubeSat
更新于2025-09-23 15:21:21
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DESIGN AND REALIZATION OF CIRCULAR POLARIZED SIW SLOT ARRAY ANTENNA FOR CUBESAT INTERSATELLITE LINKS
摘要： This paper presents the design and fabrication of an antenna based on Substrate Integrated Waveguide (SIW) for intersatellite crosslinks in C-band. The entire antenna consists of two elements of SIW slots array that is fed by a hybrid 3 dB directional coupler. The entire SIW slots array antenna is circularly polarized (CP), and each element has four longitudinal slots. The element’s e?ective ?eld matching is realized with a microstrip to SIW transition. The antenna design has been evaluated with its return loss, gain plot, and radiation pattern characteristics to validate the fabricated antenna. The fabricated prototype antenna radiates a left-handed circularly polarized (LHCP) electromagnetic wave with the peak gain of 5 dB and o?ers approximately 2% AR bandwidth around 5 GHz.
关键词： circularly polarized (CP),intersatellite links,slot array antenna,CubeSat,Substrate Integrated Waveguide (SIW)
更新于2025-09-23 15:21:01
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[IEEE 2019 IEEE 8th International Conference on Advanced Optoelectronics and Lasers (CAOL) - Sozopol, Bulgaria (2019.9.6-2019.9.8)] 2019 IEEE 8th International Conference on Advanced Optoelectronics and Lasers (CAOL) - Development and Investigation of Precision Laser-Interferometric Meter for Distance and Displacement Monitoring
摘要： We report the design and implementation of a complete electronics platform for conducting a quantum optics experiment that will be operated on board a 1U CubeSat (a 10 × 10 × 10 cm satellite). The quantum optics experiment is designed to produce polarization-entangled photon pairs using nonlinear optical crystals and requires opto-electronic components such as a pump laser, single photon detectors, and liquid crystal-based polarization rotators in addition to passive optical elements. The platform provides mechanical support for the optical assembly. It also communicates autonomously with the host satellite to provide experiment data for transmission to a ground station. A limited number of commands can be transmitted from ground to the platform enabling it to switch experimental modes. This platform requires less than 1.5 W for all operations, and is space qualified. The implementation of this electronics platform is a major step on the road to operating quantum communication experiments using nanosatellites.
关键词： space-based quantum communication,nanosatellite,photon entanglement,CubeSat
更新于2025-09-23 15:19:57
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[IEEE 2019 IEEE International Symposium on Phased Array System & Technology (PAST) - Waltham, MA, USA (2019.10.15-2019.10.18)] 2019 IEEE International Symposium on Phased Array System & Technology (PAST) - An Additively Manufactured, All-metallic Frequency-scaled Ultra-wide Spectrum Element (AM-FUSE) Active Electronically Scanned Array (AESA) for Space-borne Applications
摘要： A new breed of the Frequency-scaled, Ultra-wide Spectrum Element (FUSE) is built entirely from a single piece of metal using direct metal laser sintering (DMLS) for space-borne missions. An active electronically scanned array (AESA) was built that includes an 8x4 linearly polarized aperture and low-profile feed circuitry that has eight true-time delay units (TDU) to fit inside a 3U CubeSat. This AESA operates over 1.5 GHz – 6 GHz, scanning +/- 45 degrees in azimuth with a very low active voltage standing wave ratio (active VSWR). The weight of the array with its combiner and beamforming boards is less than 3 lbs.
关键词： wideband,tapered-slot,CubeSat,additive manufacturing,AESA,connector-less,phased arrays,Vivaldi,FUSE,Antennas,space missions
更新于2025-09-23 15:19:57
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[IEEE 2019 International Conference on Microwave and Millimeter Wave Technology (ICMMT) - Guangzhou, China (2019.5.19-2019.5.22)] 2019 International Conference on Microwave and Millimeter Wave Technology (ICMMT) - Ultra-Wideband Optically Controlled Frequency Selective Surface
摘要： We report the design and implementation of a complete electronics platform for conducting a quantum optics experiment that will be operated on board a 1U CubeSat (a 10 × 10 × 10 cm satellite). The quantum optics experiment is designed to produce polarization-entangled photon pairs using nonlinear optical crystals and requires opto-electronic components such as a pump laser, single photon detectors, and liquid crystal-based polarization rotators in addition to passive optical elements. The platform provides mechanical support for the optical assembly. It also communicates autonomously with the host satellite to provide experiment data for transmission to a ground station. A limited number of commands can be transmitted from ground to the platform enabling it to switch experimental modes. This platform requires less than 1.5 W for all operations, and is space qualified. The implementation of this electronics platform is a major step on the road to operating quantum communication experiments using nanosatellites.
关键词： space-based quantum communication,nanosatellite,photon entanglement,CubeSat
更新于2025-09-23 15:19:57
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[IEEE IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium - Valencia (2018.7.22-2018.7.27)] IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium - The Harp Hype Ran Gular Imaging Polarimeter and the Need for Small Satellite Payloads with High Science Payoff for Earth Science Remote Sensing
摘要： The largest uncertainties on estimating climate change revolve around the lack of quantitative information on aerosol and cloud microphysical properties, which limits our understanding of cloud-aerosol interaction processes and cloud feedbacks in the climate system. Part of this limitation comes from the small number of global satellite sensors which in turn only measures a restricted subset of aerosol and cloud microphysical properties. Enabling small satellites to perform high quality cloud and aerosol microphysical measurements is an important pathway to resolve this puzzle. The reduced cost of small satellites can enable the use of multiple platforms or even constellations to increase spatial and temporal coverage for the required measurements. The HARP (HyperAngular Rainbow Polarimeter) is a 3U CubeSat sensor designed for the measurement of aerosol, clouds and surface properties with a wide FOV that enables nearly global coverage from multiple wavelengths and tens of different along track viewing angles. The technology developed for HARP allows for all these characteristics to be packaged within the envelope of a CubeSat sensor while preserving strict science requirements.
关键词： Multi-Angle,Aerosol,Clouds,CubeSat,Polarimeter
更新于2025-09-19 17:15:36
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Tumbling object deorbiting using spaceborne laser engagement a?? A CubeSat case study
摘要： This paper demonstrates active space debris removal using spaceborne laser systems. The laser beam and the surface of the target are discretised into multiple rays and finite elements, respectively, for laser-target interaction modelling, in which the laser ablation process is investigated. A high-fidelity attitude/orbit propagator tool is developed to account for both the linear impulse and angular impulse induced by the laser engagement and other perturbations. The laser system is activated only when three switch criteria are satisfied. In numerical simulations, laser pulses from international space station are generated to deorbit a 3U CubeSat with initially tumbling modes. The results validate the effectiveness of deorbiting tumbling CubeSats using spaceborne laser engagement, with the perigee height lowered by approximately 2:4 km in around 30 min after 2 h propagation. It is also found that the laser engagement becomes more effective for an initially faster rotating object.
关键词： Coupled attitude/orbit dynamics,Spaceborne laser system,Tumbling CubeSat,Space debris
更新于2025-09-19 17:13:59
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[IEEE 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC) - Chicago, IL, USA (2019.6.16-2019.6.21)] 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC) - Assessing the Potential Environmental Impact of Cu <sub/>3</sub> AsS <sub/>4</sub> PV Systems
摘要： We propose the application of state–space techniques to develop a novel coupled cyber–physical system (CPS) model and use feedback control to dynamically adjust CPS resource use and performance. We investigate the use of a gain scheduled discrete linear quadratic regulator controller and a forward-propagation Riccati-based controller to handle the discrete-time-varying system. We demonstrate the value of our approach by conducting a disturbance-rejection case study for a small satellite (CubeSat) application in which resources required for attitude control are adjusted in real-time to maximize availability for other computational tasks. We evaluate CPS performance through a set of metrics quantifying physical system error and control effort as well as cyber resource utilization and compare these with traditional fixed-rate optimal control strategies. Results indicate that our proposed coupled CPS model and controller can provide physical system performance similar to fixed-rate optimal control strategies but with less control effort and much less computational utilization.
关键词： feedback,metrics,CubeSat,small satellite,Coregulation,cyber–physical system (CPS),low earth orbit satellites
更新于2025-09-19 17:13:59
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300 GHz quadrature phase shift keying and QAM16 56 Gbps wireless data links using silicon photonics photodiodes
摘要： We propose the application of state–space techniques to develop a novel coupled cyber–physical system (CPS) model and use feedback control to dynamically adjust CPS resource use and performance. We investigate the use of a gain scheduled discrete linear quadratic regulator controller and a forward-propagation Riccati-based controller to handle the discrete-time-varying system. We demonstrate the value of our approach by conducting a disturbance-rejection case study for a small satellite (CubeSat) application in which resources required for attitude control are adjusted in real-time to maximize availability for other computational tasks. We evaluate CPS performance through a set of metrics quantifying physical system error and control effort as well as cyber resource utilization and compare these with traditional fixed-rate optimal control strategies. Results indicate that our proposed coupled CPS model and controller can provide physical system performance similar to fixed-rate optimal control strategies but with less control effort and much less computational utilization.
关键词： feedback,metrics,CubeSat,small satellite,Coregulation,cyber–physical system (CPS),low earth orbit satellites
更新于2025-09-19 17:13:59