- High Speed Photometer
The High Speed Photometer (HSP) was a scientific instrument installed on the
Hubble Space Telescope . The HSP was designed to measure the brightness and polarity of rapidly varying celestial objects. It could observe inultraviolet ,visible light , and nearinfrared at a rate of one measurement per 10microseconds . The design was novel in that despite being able to view through a variety of filters and apertures, it had no moving parts.The HSP was one of the instruments on Hubble at launch but couldn't be used successfully due to the optical problems with the telescope. During the first servicing mission, in December
1993 , it was replaced by theCorrective Optics Space Telescope Axial Replacement (COSTAR), which corrected the optical problem for the remaining instruments.External links
* [http://www.stsci.edu/hst/hsp/ HSP Information at STSCI]
* [http://www.stsci.edu/hst/hsp/documents/ihb.html Instrument Handbook]
* [http://www.sal.wisc.edu/HSP/ HSP at the University of Wisconsin's Space Astronomy Laboratory]
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