This paper reports on a software architecture designed for multi-sensor pilotage displays. A need existed for a graphical display that was highly flexible and reusable between sensor systems. To that end, we developed a graphical rendering system based on scene graph architecture, which allows nodes to be added and removed, depending on the needs of the sensor and display system. Individual users and organizations can develop and apply their own nodes to this architecture while maintaining compartmentalization of intellectual property. We applied this software architecture to a radar sensor pilotage display for a rotorcraft in a degraded visual environment, based on layered extensions of the ICE / BOSS symbology set, as well as standard MIL-STD-2525 symbology. In this paper, we report the results of the software architecture development effort, and outline the rationale behind the design decisions that were made in the development process.
A 94 GHz electronic scan radar concept is presented that includes measured results of key 94 GHz hardware technical advancements that are required to bring to fruition a low cost millimeter wave radar front end. Described will be a system concept that uses a line array of 0.61λ spaced receive element radiators at 94 GHz enabling wide scanning digital beam forming and Doppler beam sharpening techniques to be used for high spatial resolution ground and obstacle mapping modes. Key hardware challenges in the area of millimeter wave radiator implementation and receiver front end integration need to be solved in order to bring this low cost millimeter wave solution to fruition. Measured results are presented for the evolutionary development of a batch processed, printed wiring board based W-band radiating element that overcomes the manufacturing tolerance and grid spacing constraints that have prohibited this from being practical in the past with current design and low cost manufacturing methods. The design enables a surface mount W-band MMIC down converter receiver package to be assembled onto the radiator board behind each element to minimize feed losses. Measured beam patterns for a proof of principle 8 element, 0.61λ spacing, waveguide radiator line array that includes surface mounted 94 GHz MMIC down converters in each channel will be presented. Measured 94 GHz results for other fabricated structures across the board will be presented to evaluate performance yield across large PWB board area.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.