In rare cases each transmitter has an antenna system. But in stations where many transmitters are used, this is not always possible, so the outputs of transmitters transmitting in the same frequency band are combined by a diplexer and applied to a single antenna system. (i.e. VHF 1, VHF 2, VHF 3, UHF).or lower frequencies a location with good ground conductivity is required. In case of microwave link chains, stations should be in observable ranges of each other. (see Earth bulge) Computer programmes for the terrain profile and abacs are used in addition to on site observations.
Kofun (å¤å¢³, from Sino-Japanese ancient grave) are megalithic tombs or tumuli in Japan, constructed between the early 3rd century and the early 7th century AD. The term Kofun is the origin of the name of the Kofun period, which indicates the middle 3rd century to early-middle 6th century. Many Kofun have distinctive keyhole-shaped mounds (zenpÅ-kÅen fun (åæ¹å¾åå¢³)), which are unique to ancient Japan.
1 Koko Crater is a large tuff cone that visually dominates the area. 2  Within the crater are horse stables and the Koko Crater Botanical Garden specializing in cacti and succulents. 3  Hanauma Bay is a tuff ring breached by the ocean.his eastern end of O Ê» ahu is quite scenic and most of the area is part of Koko Head Regional Park, administered by the City & County of Honolulu. The following features and natural areas are found between Koko Head and the eastern end of the island at MakapuÊ»u :