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http://cambridge.atspace.co.uk/wwwloopstory.htm
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first created 081007
Last updated:20190218
STORIES Martin's Stories
http://cambridge.atspace.co.uk/2016/story/stolist.htm
STORIES ... and Sin No More Based on the Bible story in John 8:3-11
http://cambridge.atspace.co.uk/2016/story/andsinnomore.htm
STORIES 12 Hz, Good afternoon
http://cambridge.atspace.co.uk/2016/story/12hz.htm
STORIES Another Gospel of Saint Luke ?
http://cambridge.atspace.co.uk/2016/story/lukegospel.htm
STORIES Claudia Jones, Happy birthday, Claudia
http://cambridge.atspace.co.uk/2016/story/claudia.htm
STORIES Free Tahiti
http://cambridge.atspace.co.uk/2016/story/freetahiti.htm
STORIES Interlin
http://cambridge.atspace.co.uk/2016/story/interlin.htm
STORIES Just in Time, Watch this, shouts Leonora
http://cambridge.atspace.co.uk/2016/story/justintime.htm
STORIES Mind Wars, Hurry, hurry
http://cambridge.atspace.co.uk/2016/story/mindwars.htm
STORIES Modestique
http://cambridge.atspace.co.uk/2016/story/modestique.htm
STORIES Mong Fu San, Sarah Wong
http://cambridge.atspace.co.uk/2016/story/mongfusa.htm
STORIES Parallel Time, What a great day for a bike ride
http://cambridge.atspace.co.uk/2016/story/paralleltime.htm
STORIES Sister Monica
http://cambridge.atspace.co.uk/2016/story/monica.htm
STORIES Stealthy No More
http://cambridge.atspace.co.uk/2016/story/stealth2.htm
STORIES Tarana
http://cambridge.atspace.co.uk/2016/story/tarana.htm
STORIES The Engineer, A long time ago
http://cambridge.atspace.co.uk/2016/story/engineer.htm
STORIES The Swimsuit, Cordelia
http://cambridge.atspace.co.uk/2016/story/swimsuit.htm
STORIES The Wishing Well, Once a young lady came from Hong Kong
http://cambridge.atspace.co.uk/2016/story/wishwell.htm
STORIES The Woman by the Well, Based on the Bible story in John 4
http://cambridge.atspace.co.uk/2016/story/womanwel.htm
STORIES The Young Man and the Old Man, The old man looked up
http://cambridge.atspace.co.uk/2016/story/youngold.htm
STORIES Three Lives, This is a story about two people
http://cambridge.atspace.co.uk/2016/story/3lives.htm
STORIES Two Sisters, Nora came home early
http://cambridge.atspace.co.uk/2016/story/2sisters.htm
STORIES Unchanged, A man was walking along the seashore
http://cambridge.atspace.co.uk/2016/story/unchanged.htm
STORIES What does Two Dollars cost ?
http://cambridge.atspace.co.uk/2016/story/2dollars.htm
STORIES Winners, Losers, lottery
http://cambridge.atspace.co.uk/2016/story/lottery.htm
The height, yes. You can't use forward scatter radar to find the height. That's why I didn't mention it in my story. What am I going to do ? Tell them it is a waste of time? Let them realise it for themselves ? Play for time ? Then what ? I wonder what is the calibre a North Korean army pistol.
Next day Moon Hee called for me and introduced me to Captain Jang. I took an instant dislike to him. There was something about him that made me very suspicious. I felt I could not trust him, and speaking with him just made things worse. His English was about as good as my Korean - nil, so our conversation was by to-ing and fro-ing through Moon Hee all the time. Fortunately Moon Hee was familiar with most of the technical terms, which were usually based on English words anyway, so it went fairly well, except that I could never get any idea of Captain Jang's feelings, whether he understood, or agreed, or was worried about a particular aspect of the work. I don't think he particularly liked me either, he just showed respect for my original idea. That was fair enough. He had done all the work, and apparently done very well. I mean, he had actually turned my science fiction idea into a sophisticated air defence system, and in one of the poorest and most isolated countries in the world - quite an achievement. I had to admire him for that.
Then he asked me about the height problem. "Our missiles must know the height of the target." I understood that of course. I told him I was working on it, but first I would like to see a demonstration of the system, and then see some of the equipment. That should give me a few days to think of something, or some other way to put him off. He agreed to show me the system working in a day or so - apparently they were waiting for a software upgrade from the programming team. Sounds familiar. So they have software bugs in North Korea too. Maybe one day they will have Coca Cola and everything else from the 'decadent West', and then they won't need an air defence system, and I can go home. His agreement to show me the system so readily was rather worrying. I would then know how good their air defence system was, something the South Koreans would dearly love to know, and were they then simply going to let me go back to London with all that knowledge ? Maybe I really would find out the calibre a North Korean army pistol after all.
I told Moon Hee I needed to go somewhere quiet to think about the height problem. Could we go for a drive into the hills ? She got an army jeep from somewhere and off we went. She seemed to know where she wanted to go, and drove us down a winding track to a stream. I wished I'd had a camera. There she was in her shorts and some sort of thick cotton blouse, with the sun shining on her long black hair, paddling across the stream. I followed, hoping the stream would become deep enough that I could suggest swimming, but it didn't.
We sat down on the grass and she asked me if I had any idea about the height problem. She is an engineer. She knows the problem. It is like triangulation with extremely small angles. To find where the aircraft is, you use several widely spaced radar receivers, making large angles with each other and each receiving the signal with different time delays. By plotting the time delays as distances you can find the aircraft's position fairly accurately. However the time delays for an aircraft at a height of 100m are practically the same as those for one at 10,000m, so you cannot find the height with any accuracy. And what about reflections off all these hills ? What it needs is a separate radar receiver for height measurement, but since we cannot put a radar station up in the sky, that is impossible. Nor can we, I was thinking from the North Korean point of view now, have a radar station on every hilltop. No, I didn't have the answer - truly. We went back to base.