نتایج جستجو برای: astronomical instrument
تعداد نتایج: 91251 فیلتر نتایج به سال:
The Haystack Telescope is an antenna with a diameter of 37 m and elevation-dependent surface accuracy ≤100μm that capable millimeter-wave observations. radome-enclosed instrument serves as radar sensor for space situational awareness, about one-third the time available research by MIT Observatory. Ongoing testing K-band (18–26 GHz) W-band receivers (currently 85–93 preparing inclusion telescope...
In India, there are extant two nineteenth century specimens of an otherwise unknown astronomical instrument called Shabnum?-wa-R?znum? with which observations can be done both in the day and at night. While the R?znum? is nothing but a sine/horary quadrant, the Shabnum? appears to be inspired by the Sanskrit instrument Dhruvabhrama-yantra which was invented by Padman?bha in the first quarter of...
AzTEC is a mm-wavelength bolometric camera utilizing 144 silicon nitride micromesh detectors. Here, we describe the AzTEC instrument architecture and its use as an astronomical instrument. We report on several performance metrics measured during a three-month observing campaign at the James Clerk Maxwell Telescope and conclude with our plans for AzTEC as a facility instrument on the Large Milli...
چکیده ندارد.
SPIRE, the Spectral and Photometric Imaging REceiver, is the Herschel Space Observatory’s submillimetre camera and spectrometer. It contains a three-band imaging photometer operating at 250, 350 and 500 μm, and an imaging Fourier-transform spectrometer (FTS) covering 194−671 μm (447−1550 GHz). In this paper we describe the initial approach taken to the absolute calibration of the SPIRE instrume...
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