Download The Solar Dynamics Observatory by R. R. Fisher (auth.), Phillip Chamberlin, William Dean PDF
By R. R. Fisher (auth.), Phillip Chamberlin, William Dean Pesnell, Barbara Thompson (eds.)
This quantity is devoted to the sun Dynamics Observatory (SDO), which was once introduced eleven February 2010. The articles concentrate on the spacecraft and its tools: the Atmospheric Imaging Assembly (AIA), the Extreme Ultraviolet Variability Experiment (EVE), and the Helioseismic and Magnetic Imager (HMI). Articles inside additionally describe calibration effects and knowledge processing pipelines which are serious to knowing the knowledge and items, concluding with an outline of the winning schooling and Public Outreach actions.
This publication is geared in the direction of a person drawn to utilizing the extraordinary facts from SDO, no matter if for basic heliophysics learn, house climate modeling and forecasting, or academic reasons.
Previously released in sunlight Physics magazine, Vol. 275/1-2, 2012.
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Extra resources for The Solar Dynamics Observatory
The optical design has a magnification of three, this corresponds to an approximately 22-µm change in focus per step. The design is based on the TRACE focus mechanism and employs a stepper motor manufactured by CDA InterCorp to drive a screw that pushes a level arm attached to the secondary mirror cell. The focus can be adjusted as often as every exposure if necessary. The filter wheel is based on the Triana/Earth Polycromatic Imaging Camera (EPIC) and Hinode/XRT designs and consists of a thin, brushless DC motor manufactured by H.
The uncertainties in both the optical constants that go into the model and the QE measurements are larger in the UV range.
In the other telescopes, the selection of the filter in the filter wheel can be used to select the desired channel, but since both of these band passes require aluminum filters, the aperture selector was necessary. The Kollmorgen RB-01501 motor can move from one position to the other in less than a second. This approach is the same as was employed for TRACE and STEREO/SECCHI. This mechanism and all the other mechanisms (apart from the door) were life tested in a vacuum for over 60 million operations, approximately double the number expected during the five-year prime SDO mission.