About the Hubble Space Telescope
... The servicing mission in 1999 enhanced many of Hubble’s subsystems, including the central computer, a new solid-state data-recording system to replace the aging magnetic tape drives, and the gyroscopes needed for pointing control. A month prior to launch, a gyroscope failure had forced Hubble into ...
... The servicing mission in 1999 enhanced many of Hubble’s subsystems, including the central computer, a new solid-state data-recording system to replace the aging magnetic tape drives, and the gyroscopes needed for pointing control. A month prior to launch, a gyroscope failure had forced Hubble into ...
IRMOS: The near-InfraRed Multi-Object
... The NGS subsystem serves four important purposes: 1) The six probe arms are used for acquisition of the scientific FOV; 2) The multiple arms can be used to measure and control, via feedback to the telescope control system, the telescope-delivered plate scale; 3) Focus measured from the NGS WFS can b ...
... The NGS subsystem serves four important purposes: 1) The six probe arms are used for acquisition of the scientific FOV; 2) The multiple arms can be used to measure and control, via feedback to the telescope control system, the telescope-delivered plate scale; 3) Focus measured from the NGS WFS can b ...
Syntax: The analysis of sentence structure
... Groups of words that belong together are called constituents The component that determines the properties of the constituent is the head, and the constituent can be referred to as a phrase: e.g. noun phrase ...
... Groups of words that belong together are called constituents The component that determines the properties of the constituent is the head, and the constituent can be referred to as a phrase: e.g. noun phrase ...
Folie 1
... - A photon detecting device that exploits the photoelectric effect and the semiconducting properties of silicon - The voltage generated is coupled to the intensity of the incident light • Pixel = picture element. Each pixel is an independent photon detector • DN = Data Number (ADU = Analog to Digita ...
... - A photon detecting device that exploits the photoelectric effect and the semiconducting properties of silicon - The voltage generated is coupled to the intensity of the incident light • Pixel = picture element. Each pixel is an independent photon detector • DN = Data Number (ADU = Analog to Digita ...
Observing the Planet Venus Teacher`s Guide
... © 2017 The University of Texas at Austin • McDonald Observatory ...
... © 2017 The University of Texas at Austin • McDonald Observatory ...
LIDAR MEASUREMENTS
... Digitalization of LIDAR measurements is performed by an analog/digital (AD) converter (Licel transient recorder) and read out by a Linux based computer for data acquisition and analysis. ...
... Digitalization of LIDAR measurements is performed by an analog/digital (AD) converter (Licel transient recorder) and read out by a Linux based computer for data acquisition and analysis. ...
Wavelength calibration from 1 − 5µ m for the CRIRES+ high
... and modelling of the atmospheric conditions, based on simultaneously measured sounding data, is required, as eg. high-altitude winds induce significant uncertainties (≤ 25m/s) on the line positions.8 Telluric molecules such as CO2 can be used with CRIRES and have demonstrated radial velocity precisi ...
... and modelling of the atmospheric conditions, based on simultaneously measured sounding data, is required, as eg. high-altitude winds induce significant uncertainties (≤ 25m/s) on the line positions.8 Telluric molecules such as CO2 can be used with CRIRES and have demonstrated radial velocity precisi ...
Refereed Publications - Center for Astrophysics and Space
... Non-Refereed Conference Proceedings and Other Papers 1. Griffin, M., Swinyard, B., Vigroux, L., Abergel, A., Ade, P., André, P., Baluteau, J-P., Bock, J., Franceschini, A., Gear, W., Glenn, J., Huang, M., Griffin, D., King, K.,Lellouch, E., Naylor, D., Oliver, S., Olofsson, G., Perez-Fournon, I., Pa ...
... Non-Refereed Conference Proceedings and Other Papers 1. Griffin, M., Swinyard, B., Vigroux, L., Abergel, A., Ade, P., André, P., Baluteau, J-P., Bock, J., Franceschini, A., Gear, W., Glenn, J., Huang, M., Griffin, D., King, K.,Lellouch, E., Naylor, D., Oliver, S., Olofsson, G., Perez-Fournon, I., Pa ...
optics7
... should be able to read 1M print (standard size reading material) with a add power of (100/20 = 5) +5.00 sphere. Test circumstances such as illumination, contrast, and target type must be kept precisely the same……………..this is most of the time unable to be performed ...
... should be able to read 1M print (standard size reading material) with a add power of (100/20 = 5) +5.00 sphere. Test circumstances such as illumination, contrast, and target type must be kept precisely the same……………..this is most of the time unable to be performed ...
Bayesian flux reconstruction in one and two bands
... Sb(2) by virtue of sharing common physical sources of emission, and 2) that knowledge of the spectral index and the flux in one band informs the flux in the other band. In the absence of correlations, the joint posterior splits into replicas of the single-band case applied independently to each band ...
... Sb(2) by virtue of sharing common physical sources of emission, and 2) that knowledge of the spectral index and the flux in one band informs the flux in the other band. In the absence of correlations, the joint posterior splits into replicas of the single-band case applied independently to each band ...
... The astronomical measurements performed with Gaia will be accurate to 24 microarcsec, about 100 times more accurate than its predecessor Hipparcos, and comparable to measuring the diameter of a human hair at a distance of 1000 kilometres. To achieve this extreme accuracy at a minimum operational te ...
E.Tournefier - Virgo progress
... Noise also seen in the suspended injection bench error signals investigations in laser lab, around injection tower (electronics, seismic noise, laser chiller, tapping tests,…) investigations on the injection suspended bench Guilty = piezo-actuators on the suspended bench ...
... Noise also seen in the suspended injection bench error signals investigations in laser lab, around injection tower (electronics, seismic noise, laser chiller, tapping tests,…) investigations on the injection suspended bench Guilty = piezo-actuators on the suspended bench ...
PATBNTED OCT. 29. 1907. TELESCOPE.
... tagonal in form, although in substance it is the same as the triangular prism of Figs. 1 to 4, the additional mate rial marked A’ performing no function except that of 70 enabling the constructor to eliminatev air-to-glass sur— faces between the two prisms. ...
... tagonal in form, although in substance it is the same as the triangular prism of Figs. 1 to 4, the additional mate rial marked A’ performing no function except that of 70 enabling the constructor to eliminatev air-to-glass sur— faces between the two prisms. ...
SEI Structure Development - LIGO
... PO mirror suspension engineering estimate based on quad SUS prototype * For LIGO estimating, contingency was first estimated using a standard qualitative process to assign risk factors at the activity level for technical and procurement risk and at the WBS level for schedule risk. The additional ris ...
... PO mirror suspension engineering estimate based on quad SUS prototype * For LIGO estimating, contingency was first estimated using a standard qualitative process to assign risk factors at the activity level for technical and procurement risk and at the WBS level for schedule risk. The additional ris ...
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... (mag . −6.0), while it reaches up to 0.15 pixels for faint stars (mag & −4.0), if they are located far away from the read-out amplifier. As seen in the middle plot of Fig.1, the centroid shift (∆ Y) is linear with instrumental magnitude for both chips. Thus, CTE-induced centroid shift (∆Y ) can be p ...
... (mag . −6.0), while it reaches up to 0.15 pixels for faint stars (mag & −4.0), if they are located far away from the read-out amplifier. As seen in the middle plot of Fig.1, the centroid shift (∆ Y) is linear with instrumental magnitude for both chips. Thus, CTE-induced centroid shift (∆Y ) can be p ...
NS2-M3C12S2_-_The_Radiotelescope
... A system consisting of an antenna, either parabolic or dipolar, used to gather radio waves emitted by celestial sources and bring them to a receiver placed in the focus ...
... A system consisting of an antenna, either parabolic or dipolar, used to gather radio waves emitted by celestial sources and bring them to a receiver placed in the focus ...
Current Lidar Activities at ETL
... Reconfigured optical system to incorporate a fiber coupled receiver detector. Implemented a PZT controlled variable coupler to regulate amount of LO power mixing with return signal. Simplified transmit/receive paths. Completely re-designed receiver detector circuitry to be compatible with fiber rece ...
... Reconfigured optical system to incorporate a fiber coupled receiver detector. Implemented a PZT controlled variable coupler to regulate amount of LO power mixing with return signal. Simplified transmit/receive paths. Completely re-designed receiver detector circuitry to be compatible with fiber rece ...
Newtonian Telescope Collimation with the Astrosystems LightPipe
... the upper cage is centered over and square to the mirror box. Measuring to verify this will save time and frustration later. Center the primary mirror in the mirror box With open end mirror boxes, it is a simple task to measure in from the mirror box sides to the side of the mirror. With closed tube ...
... the upper cage is centered over and square to the mirror box. Measuring to verify this will save time and frustration later. Center the primary mirror in the mirror box With open end mirror boxes, it is a simple task to measure in from the mirror box sides to the side of the mirror. With closed tube ...