5 ms·
Can you expound on that? Does it have to do with atmospheric curving of the radar beam?
by yock 13y ago
Can you expound on that? Does it have to do with atmospheric curving of the radar beam?
- confluence 13y ago> The use of primary radar requires a great deal of signal power, because objects further from the antenna will reflect or send back a weak signal. At longer distances from the antenna, radar becomes unreliable as a way to determine aircraft position with only reflected signals. http://www.wisegeek.com/what-is-a-primary-radar.htm http://www.wisegeek.com/what-is-a-primary-radar.htm
- digikata 13y agoI think it has to do with electromagnetic ducting or other clutter effects: http://www.radartutorial.eu/07.waves/wa17.en.html http://www.radartutorial.eu/07.waves/wa17.en.html If the last effect on the page were in effect, you might get a return, know it's relative bearing well, it's range a little less well, and it's altitude not very well at all.
- Nacraile 13y agoRadar derives altitude from measurements of distance and elevation angle. The greater the distance, the less sensitive elevation angle is to vertical displacement (simple trigonometry), and hence signal:error decreases.