詞彙學習：
"A"singal received： 接收到信號A
Neither "A"or "B"singal received : 均未收到信號A 和信號B
VOR :Very High Frequency (VHF) Omnidirectional Range 超高頻（VHF)全向範圍
The VOR system is present in three slightly different navigation aids (NAVAIDs): VOR, VOR/distance measuring equipment (DME) and VORTAC. By itself it is known as a VOR, and it provides magnetic bearing information to and from the station. When DME is also installed with a VOR, the NAVAID is referred to as a VOR/DME. When military tactical air navigation (TACAN) equipment is installed with a VOR, the NAVAID is known as a VORTAC. DME is always an integral part of a VORTAC. Regardless of the type of NAVAID utilized(VOR, VOR/DME, or VORTAC), the VOR indicator behaves the same. Generally,VOR, VOR/DME, and VORTAC NAVAIDs are all referred to as VORs.
VOR系統存在三種略有不同的導航輔助設備（NAVAID）：VOR，VOR /距離測量設備（DME）和VORTAC。 就其本身而言，它被稱為VOR，它提供往返於站點的磁性方位信息。 當DME也與VOR一起安裝時，NAVAID稱為VOR / DME。 當軍事戰術空中導航（TACAN）設備安裝有VOR時，NAVAID被稱為VORTAC。 DME始終是VORTAC的組成部分。 無論使用哪種NAVAID（VOR，VOR / DME或VORTAC），VOR指示器的行為都相同。 通常，VOR，VOR / DME和VORTAC NAVAID都稱為VOR。
The prefix “omni-” means all, and an omnidirectional range is a VHF radio transmitting ground station that projects straight line courses (radials) from the station in all directions. From a top view, it can be visualized as being similar to the spokes from the hub of a wheel. The distance VOR radials are projected depends upon the power output of the transmitter.
The course or radials projected from the station are referenced to Magnetic North. Therefore, a radial is defined as a line of magnetic bearing extending outward from the VOR station. Radials are identified by numbers beginning with 001, which is 1° east of MN and progress in sequence through all the degrees of a circle until reaching 360. ✈️. To aid in orientation, a compass rose reference to magnetic north is superimposed on aeronautical charts at the station location.
845/5000.
前綴“全向”表示全部，全向範圍是VHF無線電發射地面站，該地面站從該站向各個方向投射直線路線（徑向）。 從頂視圖可以看到它類似於來自輪轂的輻條。 投影的距離VOR半徑取決於發射器的功率輸出。從測站投影的航向或徑向參考磁北。 因此，將徑向定義為從VOR站向外延伸的磁力軸承線。 徑向半徑由以001開始的數字標識，該數字位於MN以東1°處，並依次遍歷一個圓度直至達到360度。為了幫助確定方向，在站點位置的航空圖上疊加了以磁北為參考的羅盤845/5000。
✈️. VOR ground stations transmit within a VHF frequency band of 108.0–117.95 MHz. Because the equipment is VHF, the signals transmitted are subject to line-of-sight restrictions. Therefore, its range varies in direct proportion to the altitude of receiving equipment. Generally, the reception range of the signals at an altitude of 1,000 feet above ground level (AGL) is about 40 to 45 miles. This distance increases with altitude.
VOR地面站在108.0–117.95 MHz的VHF頻帶內發射。 由於設備是甚高頻設備，因此傳輸的信號受到視線限制。 因此，其範圍與接收設備的高度成正比變化。 通常，在高於地面（AGL）1,000英尺的高度處，信號的接收範圍約為40到45英里。 該距離隨高度增加。
閱讀更多 飛行知識 的文章
