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: http://www.naic.edu/~phil/pnt/platTdMotion.html
Дата изменения: Mon May 17 00:06:17 2004 Дата индексирования: Tue Oct 2 05:06:53 2012 Кодировка: Поисковые слова: motion |
To check how the platform moves when we pull
equally on all 3 tiedowns, tests were done on 02apr01 and 13apr01.
The temperature was about 80 deg F and the positions were:
date | az, za position | tiedown motion |
2apr01 | az:271 za:19.69 | 19"-12"-19" |
13apr01 | az:60 za:19 | 13"-17"-13" |
The platform position was recorded every 30 seconds with the distomats. The figures (.ps) (.pdf) plot the relative change from the lowest most platform position versus time.
If the vertical difference is caused by variations in spring constants of the cable system then a model made at night (with higher tension in the tiedowns) would have a systematic offset for daytime observing. The test should probably be redone at night when the temperature is stable.
processing: x101/010402/lr02apr.pro,lr13apr.pro
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