Bulletin of the American Physical Society
2020 Annual Meeting of the APS Four Corners Section (Virtual)
Volume 65, Number 16
Friday–Saturday, October 23–24, 2020; Albuquerque, NM (Virtual)
Session M01: Astronomy and Earth ScienceLive
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Chair: Bill Fairbank, Colorado State University |
Saturday, October 24, 2020 12:30PM - 12:42PM Live |
M01.00001: Characterizing Satellites Using Near-Simultaneous Polarization Measurements Audra Jensen, Michael Plummer, Francis Chun, David Strong The United States Air Force Academy operates an f/8.2 16-inch telescope fitted with an Andor Alta U47 1024 X 1024 pixel CCD camera and a nine position filter wheel. This telescope was used to observe five clusters of 14 geosynchronous communication satellites on six different nights in the month of March 2020, during what is called the glint season, which is typically during the weeks surrounding the fall and spring equinoxes. Near-simultaneous spectral and polarization images were captured using a 100 lines per millimeter diffraction grating and linear polarization filters (0 degrees, 45 degrees, 90 degrees, 135 degrees). The measured intensities through the linear polarization filters were used to derive output Stokes parameters. A previously determined calibration matrix was used to calculate the input Stokes parameters of the incident light on the optical system. Analysis was then performed on the resulting input Stokes parameters and the associated degree of linear polarization (DOLP) during and before the solar panel glints. Differences in the satellites' Stoke parameters are potentially indicative of different satellite materials or geometries altering the polarization properties of the initially unpolarized sunlight. Detailed analysis aims to provide relationships between satellite systems based on processed data. [Preview Abstract] |
Saturday, October 24, 2020 12:42PM - 12:54PM Live |
M01.00002: A New Theory to Explain the Dark Matter Gh. Saleh, Reza Alizadeh, Mohammad Reza Khezri, Khalil Kaboli According to the current theory the Dark Matter effect exists everywhere but it cannot be seen. Dark matter is everywhere but we can't find it. In principle, matter occupies space and it is there where the force takes effect. Given that Dark Matter does not meet the definition of mass. Actually there is no any Matter, but rather a force whose effect holds the structure of galaxies. So it is a force and not a mass. We should not forget that it is called Dark because the science has no knowledge about its nature; the one that we are going to explain and that we can call the Vivid Force. In this article we have explained the nature of this force. This definition is better suited for galaxy consistency. [Preview Abstract] |
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