A5101563975- Optical Wireless Communication Technologies
- Soil Moisture and Remote Sensing
- Calibration and Measurement Techniques
- Spacecraft Design and Technology
- Space Satellite Systems and Control
- Optical Coatings and Gratings
- Remote Sensing in Agriculture
- Adaptive optics and wavefront sensing
- Infrared Target Detection Methodologies
- Military Strategy and Technology
- Simulation and Modeling Applications
- Hydrocarbon exploration and reservoir analysis
- Advanced optical system design
- Cryospheric studies and observations
- Target Tracking and Data Fusion in Sensor Networks
- Satellite Communication Systems
- Semiconductor Lasers and Optical Devices
- Remote Sensing and LiDAR Applications
- Optimization and Packing Problems
- Enhanced Oil Recovery Techniques
- Smart Agriculture and AI
- Photonic and Optical Devices
- Advanced Fiber Optic Sensors
- Scheduling and Optimization Algorithms
- Military Defense Systems Analysis
Durham University
2021-2024
RTX (United States)
2012
Barber-Nichols (United States)
2002
Precision beam pointing plays a critical role in free-space optical communications terminals uplink, downlink and inter-satellite link scenarios. Among the various methods of steering, use fast steering mirrors (FSM) is widely adopted, with many commercial solutions employing diverse technologies, particularly focusing on small, high-bandwidth mirrors. This paper introduces method using lightweight, off-the-shelf components to construct custom closed-loop mirror platform, suitable for...
We present FYMOS, an all-aluminum, robust, light weight, freeform based, near infrared hYperspectral imager for MOisture Sensing. FYMOS was designed and built to remotely measure moisture content using spectral features from 0.7-1.7µm integrating InGaAs sensor. The imaging system, operating at F/2.8, is based on the three-concentric-mirror (Offner) spectrograph configuration providing a resolution of 8 nm optimized broad coverage with sufficient make assessments water levels. To optimize...
Department of Defense (DoD) intelligence, surveillance, and reconnaissance (ISR) assets; including manned unmanned airborne, space-borne, maritime, terrestrial systems; play critical roles in support current future military operations. However, services defense agencies face an ever growing challenge effectively processing, exploiting, disseminating ISR data from multiple, diverse senor platforms for end-users who collaborate share information within a net-centric enterprise environment....
This paper reports on a nested freeform Three Mirror Anastigmat (TMA) telescope designed for 3U CubeSat, achieving compact 1.5U form factor with focal length of 500mm, F/4.6. Capable near-diffraction-limited performance in 0.37°x0.42° field view, it provides 5m Ground Sampling Resolution Low Earth Orbit. The explores two housing options: one additive manufacturing (AM) and the other conventional machining (CM), aiming to determine optimal approach creating an AM-based optical system suitable...
This paper examines the growing adoption of laser communication (lasercom) in space missions and payloads for identifying emerging trends key technology drivers future optical communications satellite systems. It also presents a comprehensive overview commercially available custom-designed lasercom terminals, outlining their characteristics specifications to meet evolving demands global networks. The analysis explores technical considerations challenges associated with integrating terminals...
The Assistant Secretary of Defense (ASD) memorandum pertaining to command, control, communications, and intelligence (C3I) tactical data link policy, dated, October 18, 1994, states: "...this policy designates the US agreed Link-16 as DoD primary for all Service Agency Command Control (C2) (I) when practical, weapon system applications...". is synonymous with Tactical Digital Information Link (TADIL) J. TADIL J primarily carried by Joint Distribution System (JTIDS). Ballistic Missile...
Remote sensing using passive solar illumination in the Short-Wave Infrared spectrum is exposed to strong intensity variation spectral bands due atmospheric changing conditions and absorption. More robust analysis methods, insensitive these effects, are increasingly required improve accuracy of data field extend use system "non ideal" condition. A computational hyperspectral image method (named HIAM) for deriving optimal reflectance indices remote soil moisture content detailed demonstrated....
Success in the future battle space is increasingly dependent on rapid access to right information. Faced with a shrinking budget, Government has mandate improve intelligence productivity, quality, and reliability. To achieve increased ISR effectiveness, leverage of tactical edge mobile devices via integration strategic cloud-based infrastructure single, most likely candidate area for dramatic near-term impact. This paper discusses security, collaboration, usability components this evolving...
We present an integrated fiber optic spectrally resolved downwelling irradiance sensor for pushbroom hyperspectral imagers. The system comprises of a cosine corrector and custom patch cables, collecting the ambient light in large solid angle feeding it directly to entrance slit spectrometer. enables simultaneous measurement upwelling using main camera sensor. As demonstration, spectral reflectance soil sample was measured with RMSE 8.4%, significant improvement on 54% found without...
Given the increasing utilization and dependence on ISR information, operators imagery analysts monitoring intelligence feeds seek a capability to reduce processing overload in transformation of data actionable information. The objective they is improvement time critical targeting (TCT) response for mission events. Existing techniques addressing this problem are inflexible lack dynamic environment adaptation changing This paper presents novel approach information collection, processing,...
The design and demonstration of a compact, lightweight downwelling irradiance sensor integrated into custom near-infrared hyperspectral imager built for use on UAV during patchy cloud conditions remote soil moisture content sensing.
We present FYMOS, an all-aluminum, robust, light weight Freeform based hY- perspectral imager for MOisture Sensing. FYMOS has been purposely designed to remotely measure moisture content with InGaAs sensor, using spectral features in the SWIR.
The design and demonstration of a compact, lightweight near infrared hyper- spectral imager optimised for remote soil moisture sensing from UAV platforms using freeform diffraction grating is presented.