白杨鱼
发表于 2025-3-28 14:51:12
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人造
发表于 2025-3-28 19:32:49
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regale
发表于 2025-3-29 01:06:29
Image Detectors for Recording Astronomical Ultraviolet Spectraindividual photon events. Magnetically focused electronographic systems have also been used to record ultraviolet spectra. The detector systems are being developed for use in instrumentation carried on rocket vehicles or on the Shuttle-borne ‘Spacelab’ manned orbital platform for astronomical ultraviolet spectroscopic studies.
Glycogen
发表于 2025-3-29 05:52:36
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圣人
发表于 2025-3-29 08:17:24
On Line Digital Correlation of Photon Counting TV Images for Stellar Interferometry only partly hard wired, a software algorythm being used to derive the autocorrelation. Plans for a fully hard wired digital processor are also given. Such systems are expected to extend interferometric observations to faint objects:m.=20 for Palomar, m.=15 for multi telescopes interferometers.
进步
发表于 2025-3-29 14:08:34
Problems of Oversampling with Sec Vidicon Television Systemsant practical question is the nature of this destructive sampling process when the sample intervals become smaller than the beam width, a condition termed oversampling. The electron beam shape is assumed to be Gaussian with standard deviation σ. We will examine the one-dimensional case first, and give an example of the two-dimensional case.
溺爱
发表于 2025-3-29 18:40:29
Photon-Counting Detector Arrays Based on Microchannel Array Platesengths. The operation of one-and two-dimensional photon- counting detector arrays based on the MCP at extreme ultraviolet wavelengths will be described and the design of sealed arrays for use at ultraviolet and visible wavelengths briefly discussed.
Harness
发表于 2025-3-29 22:30:30
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枯燥
发表于 2025-3-30 02:59:18
cm and 2.2 cm for net-solution. After the refinement, the OD accuracy of IGSOs 3D overlap increase by 15.4%, while MEOs increase by 25.9%. We also evaluate BDS satellite orbit with SLR measurements, results reveal that SLR residuals of BD-2 satellites reduce from 0.39 m to 0.24 m, the accuracy incr
SPASM
发表于 2025-3-30 07:32:43
K. Aa. Strand cm and 2.2 cm for net-solution. After the refinement, the OD accuracy of IGSOs 3D overlap increase by 15.4%, while MEOs increase by 25.9%. We also evaluate BDS satellite orbit with SLR measurements, results reveal that SLR residuals of BD-2 satellites reduce from 0.39 m to 0.24 m, the accuracy incr