2016年5月22日 · The original TACAN antenna is made of two small rotating drums with parasitic antenna elements (see details below). A TACAN can be installed on ships or mobile stations. The TACAN antenna is externally similar to a conventional VOR. A TACAN in Alaska during an exercise: (Source: Wikipedia) The cylinder contains the rotating antenna system. In ...

2017年12月26日 · Totally legal to tune it up & use it. If it is a VORTAC, it will work just like every other VORTAC out there. If it is a TACAN, you may be able to get DME from it, but you won”t get bearing from it without a TACAN receiver. Many, perhaps most VOR’s out there are in fact VORTAC’s — the TACAN station is colocated with the VOR.

2018年1月23日 · Even if the military didn't mind there would likely be no demand as the costs of using TACANs outweigh the benefits. TACAN is essentially a more accurate version of VOR, and although the complexity and weight of the system has reduced the antenna is still apparently 100 pounds (45kg). For light aircraft that's a fair chunk of useful weight ...

2020年6月4日 · The illustrations in the link from @CrossRoads only show what would be seen by a receiver at 000 magnetic. For other bearings the whole envelope shifts while the reference bursts stay still. The antenna illustration shows reflectors on spinning drums that create an envelope whose phase difference from the reference bursts depends on bearing.

2023年11月15日 · TACAN / VORTAC DME. In a TACAN the DME reply pairs from the transponder are also used for bearing determination. A rotating directional radiation pattern is used, either using a rotating antenna or a circular phased array. The pattern rotation rate is 15 Hz, and a ripple is added at 135 Hz for a more accurate bearing determination.

Part of the TACAN is DME (Distance Measurement Equipment), which works in the same frequency band. The DME used in TACAN is the same that can be used by civil aircraft. Due to the higher frequency the system is more accurate and the antenna is much smaller and therefor easier to deploy (e.g. on a ship, on a battlefield).

2017年2月5日 · The antenna actually rotates physically. NDB use long wire antennas of many kinds. The power is radiated with nearly no particular preference (omnidirectional antenna), but the radiation pattern is still similar to the C-VOR one, except that there is no need to rotate it. The donut volume is obtained with the antenna stationary.

2017年10月4日 · $\begingroup$ TACAN is a military version of VOR. It also transmits a DME signal that is used by both military and civilian pilots. I don’t know anything about the antenna size and receiver weight but I’d imagine that they are similar to VORs. $\endgroup$ –

2023年12月15日 · A VOR and a TACAN can be collocated as a VORTAC to provide bearings and distances both to civilian and military aircraft. TACAN are identifed by a triangular pattern (TACAN and VORTAC). You can also see ICAO recommendation for indicating DME-referenced distances is different from the one used in the US (not a D-box), but requires the DME id to ...

2016年7月7日 · Each active antenna of the array transmit a pure frequency corresponding to a sideband of the subcarrier: f-9.96 kHz and f+9.96 kHz, f being the VOR carrier frequency. When associated with the carrier sent from the central antenna, these sidebands represent a carrier AM modulated by the 9.96 kHz signal.