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Threat Mitigation
Published in Ron Burch, Resilient Space Systems Design: An Introduction, 2019
As with electronic threats, the optical receiver is most vulnerable to the threat. Satellite optical receivers often consist of a semiconductor sensor with some type of focusing optical assembly to capture and focus the light, such as a telescope. Examples are the Hubble Space Telescope and the Space Based Surveillance System (SBSS). The field of view of the receiver can be wide or narrow. Again, as with RF systems, the wider the coverage area, the lower the amplification but the more susceptible the system is to an optical threat.
System Development Framework — Technical
Published in Paul B. Adamsen, A Framework for Complex System Development, 2000
Especially in low earth orbit remote sensing missions, where a high degree of pointing accuracy is required, the zero-momentum design is often implemented. The Compton Gamma Ray Observatory (CGRO) and the Hubble Space Telescope (HST), shown in Figures 5.23 and 5.24, respectively, are examples.
Alien Worlds
Published in Thomas Hockey, Jennifer Lynn Bartlett, Daniel C. Boice, Solar System, 2021
Thomas Hockey, Jennifer Bartlett, Daniel Boice
In addition, the Hubble and Spitzer Space Telescopes have been employed in the search for and study of exoplanets. Two highly anticipated NASA facilities, the James Webb Space Telescope7 and the Nancy Grace Roman Space Telescope8 will devote part of their observing time to hunt for exoplanets also.
Numerical and experimental investigation on dynamics of deployable space telescope experiencing deployment and attitude adjustment motions coupled with laminated composite shell
Published in Mechanics Based Design of Structures and Machines, 2022
Bindi You, Xiangjie Yu, Dong Liang, Xiaomeng Liu, Xujian Yang
More recently, many kinds of deployable space telescopes (DST) have been designed and launched to observe the universe (Weck and Miller 1999). Due to the limitation of size and weight of rocket, primary mirror of space telescope with large aperture is mostly designed as flexible structure composed of lighter laminated composite materials (Postman, Brown, and Sembach 2012). However, deployment motion will cause flexible deformation and vibration for primary mirror, which will affect the surface accuracy and pointing accuracy. Further, those effects would reduce the imaging quality and eventually result in the loss of intended missions. For instance, Hubble Space Telescope had suffered system failures due to flexible deformation and nonlinear vibration of its solar array (Duan, Xiang, and Xue 2008). Thus, it is necessary to analyze the complex dynamic behavior of the flexible DST.
Comparison of Rutherford’s atomic model with the Standard Model of particle physics and other models
Published in Journal of the Royal Society of New Zealand, 2021
NASA currently plans to launch a telescope named the Roman Space Telescope in the current decade, and to devote a large fraction of telescope time to observations of exoplanets by microlensing (Penny et al. 2019). The Roman Space Telescope will have the same aperture as the Hubble Space Telescope, but a field of view approximately 10 × larger. The image quality will be similar to that of the Hubble, and this will enable stars in the galactic bulge to be resolved, a major advantage over current ground-based observations. The wavelength coverage of the Roman telescope will extend significantly into the infrared, enabling observations to be made close to the densely populated galactic plane.