Cedar Rapids's research while affiliated with Delft University of Technology and other places

Publications (29)

Conference Paper
A study to identify and begin to evaluate communication technology candidates expected to meet the long-term data communications needs of the post NextGen National Airspace System (NAS) was completed, considering how the NAS and communications technologies will evolve during a 50-year NAS modernization time horizon. This paper summarizes the resear...
Article
This paper surveys Global Navigation Satellite System (GNSS) tropospheric modeling techniques currently employed in Space Based Augmentation Systems (SBAS), Ground Based Augmentation Systems (GBAS), and in precise point positioning applications. A method for generating GBAS tropospheric corrections without the use of meteorological sensors is discu...
Article
A thermal imaging technique is used to characterize a Monolithic Gallium Nitride distributed power amplifier under DC and RF drive conditions. The temperature difference among the active cells (transistors) in distributed power amplifier is observed under RF drive conditions. It is believed that this non-uniform performance of individual cells in b...
Article
Full-text available
During taxiing, an Electronic Flight Bag (EFB) showing airport and route-data can support pilots. In the present study, the possibility of using a Voice Recognition System (VRS) to enable pilots to enter route instructions, for usage in situations where digital data link is not available, was investigated. The potential of techniques that utilize i...
Article
We argue for a policy-based approach to in- crease spectrum availability. We have designed a language to capture rules and regulations for opportunistic spectrum use. A Policy Reasoner that reasons about these spectrum- sharing policies can be used with cognitive radios to guarantee policy-specified behaviors. We demonstrate the reasoner on various...
Article
Full-text available
In 2000, an industrial component focus group was formed to determine the characteristics of lead-free soldering with respect to component solderability, board solderability, manufacturing and processes, solder joint reliability, and tin whisker growth. The team's goal was to provide the electronics manufacturing community with data concerning the i...
Article
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Citations

... The "standard" models used for residual tropospheric delay error given in the current quasi-standard (RTCA 2006) are considered very conservative (McGraw 2012). Although this is advantageous from a safety point of view, it has a negative effect on the availability and continuity of the positioning service. ...
... " This finding highlights the need for navigation displays that depict the airport layout, the location of the gates and runways, and the cleared taxi route. Such navigation displays have been developed (e.g., Hooey, Foyle & Andre, 2001; Theunissen, Rademaker, Jinkins & deHaag, 2002) and are under consideration for implementation by industry (Comstock et al., 2004). The wide-scale deployment of such displays should be considered a minimum requirement for the coordinated runway-crossing concept. ...