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... ), causing very intense light to appear when in space. When this occurs, a neutral- density filter may be required to decrease the intensity of the light so that quality photography can ...

... your valves and your pressure regulators and your check valves and relief valves and your filters and all the things that you needed in the system, and all your instrumentation. Go ... open or leak or something like that. We didn’t have good system filters upstream. We had little filters at the valves, and all this stuff that was dirt and contamination of ... same guys were around when we designed the Shuttle system, so we had all those filters done right. So system cleanliness in any liquid or fluid system is always, always, always ...

... , said that contaminants in the oil had previously clogged Shuttle filters, which resembled the oil filter in an automobile. However, replacing a filter along with the lubricant it was supposed to keep clean ... would happen if the APU was operated with a clogged filter (using the oil and filter removed from Columbia ) showed that the filter would clear after about 10 minutes of operation, as the ...

... of estimators are studied. A. Multiplicative Quaternion Kalman Filter The Multiplicative Quaternion Kalman Filter, or MEKF, was developed in 7 using an Extended Kalman Filter (EKF) framework. The EKF is considered the workhorse ... 8 directly for discrete-time equations as a spacecraft attitude determination technique based on unscented filtering -albeit under the name UNscented QUaternion Estimator, or USQUE. As in the MEKF, a generalized ...

... quarantine, it was also various operations. On either side of these filters was a big valve. Steam was piped to the filter. We had liquid nitrogen, steam; utility lines all over the ... ’d close both these valves, run steam through the filter to sterilize it, then you could open it and replace the filter. Nobody would ever do that purposely on a vent from ... a Cosmic Dust Program where aircraft, WB-57s, are flown out of Ames with special filters on them. They aren’t opened up till they get in the stratosphere, That material ...

... quarantine, it was also various operations. On either side of these filters was a big valve. Steam was piped to the filter. We had liquid nitrogen, steam; utility lines all over the ... ’d close both these valves, run steam through the filter to sterilize it, then you could open it and replace the filter. Nobody would ever do that purposely on a vent from ... a Cosmic Dust Program where aircraft, WB-57s, are flown out of Ames with special filters on them. They aren’t opened up till they get in the stratosphere, That material ...

... deg h^ -1 . This is done to test the convergence properties of the filters under large initial errors. For MEKF, UQKF and 2STEP, the process noise parameters are input ... algorithms for Case 1.'' B. Case 2 Case 2 includes the same orbital conditions and filter parameters as Case 1. Now, however, convergence from extreme error cases is tested. The estimated ...

... , pp. 439–517. 5 Markley, F. L., Crassidis, J. L., and Cheng, Y., “Nonlinear attitude filtering methods,” AIAA Guidance, Navigation, and Control Conference, 2005, pp. 15–18. 6 Farrenkopf, R., “Analytic ... , No. 5, 1982, pp. 417–429. 8 Crassidis, J. L. and Markley, F. L., “Unscented filtering for spacecraft attitude estimation,” Journal of guidance, control, and dynamics, Vol. 26, No. 4, 2003 ...

... announced. Astronomer Carl Sagan said that someone had given the wrong weighting to the color filters in reconstructing the electronic image on earth, and that corrected photos would show a pinker ... . Thomas Mutch, leader of the Viking spacecraft Viking imaging team, said computer verification of the filtered signals for color reconstruction could take another wk or two. (W Star, 23 July 76 ...

... California. More recently, NASA developed an advanced natural wastewater-treatment process that combined anaerobic microbial filter technology with the vascular plant wastewater treatment technology to produce an efficient hybrid system that ... -tolerant plants such as common reed growing on the surface of a microbial rock filter bed. The filter reed system had advantages over the floating aquatic system because wastewater was exposed to ...

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