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References in periodicals archive ?
These failures could have serious consequences: navigational radar not only helped our bomb crews locate enemy targets but also assisted them in avoiding dangerous areas and getting safely back to their bases.
Diana Biro's postscript: Dad was hoping to hear from people who knew some of the men he worked with in the 376th or who could share similar anecdotes about Army Air Forces units, as well as anyone who wanted to learn more about high-altitude navigational radar. In his memory, I welcome responses to this article.
(ii) ship-borne marine navigational radars are often located a few meters above the sea surface, while shore-based VTS radars are located at low elevations near the coastline; hence, the wave front from the radar propagates parallel or almost parallel to the sea surface (depending on atmospheric refraction); assuming that the ship pitch and roll is only a couple of degrees leads to incidence angles on the wind turbine nearly perpendicular to the vertical axis of the mast ([theta] = 90[degrees] in Figure 1) or just a few degrees above the sea surface; in this study, the range 87[degrees] < 0 < 90[degrees] has been deemed as representative of this scenario;
Although this approach does not account for the RCS variation due to the rotation of the blades, this is deemed acceptable for marine navigational radars and for providing initial assessment for the more complex VTS radars.
In addition, the ship has three navigational radars, a long range early-warning radar, a surveillance radar and a sophisticated communications system.
This was for a system to alter the ground radar echoes around important targets in the US, using corner reflectors or jammers to confuse the bombing and navigational radars of hostile aircraft.
There are also Nato Seagnat decoy launchers and the vessel has two navigational radars, one surveillance radar and an electronic surveillance system.
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