Observation of night time spread—F was performed by means of DGS—256 atHainan island.Owing to the multi-parametric measurement ability of DGS—256,themulti—trace structure of range spread—F was found on both the a...Observation of night time spread—F was performed by means of DGS—256 atHainan island.Owing to the multi-parametric measurement ability of DGS—256,themulti—trace structure of range spread—F was found on both the amplitude ionogram andstatus ionogram.This structure consists of a main trace,echoes reflected vertically fromordinary ionosphere,and one or several satellite traces,off-vertical echoes展开更多
It is difficult to say what is the real centre of London, but many people would choose Piccadilly Circus.This is because it is not only central but also the heartof London’s entertainment world. Within a few hundredy...It is difficult to say what is the real centre of London, but many people would choose Piccadilly Circus.This is because it is not only central but also the heartof London’s entertainment world. Within a few hundredyards of it we find most of London’s best-known theatresand cinemas, the most famous restaurants and the mostluxurious night-clubs.展开更多
文摘Observation of night time spread—F was performed by means of DGS—256 atHainan island.Owing to the multi-parametric measurement ability of DGS—256,themulti—trace structure of range spread—F was found on both the amplitude ionogram andstatus ionogram.This structure consists of a main trace,echoes reflected vertically fromordinary ionosphere,and one or several satellite traces,off-vertical echoes
文摘It is difficult to say what is the real centre of London, but many people would choose Piccadilly Circus.This is because it is not only central but also the heartof London’s entertainment world. Within a few hundredyards of it we find most of London’s best-known theatresand cinemas, the most famous restaurants and the mostluxurious night-clubs.
