E. A. West,1 G. A. Gary,1 M. Noble,1 D. Choudhary,2 B. Robinson3
1NSSTC/NASA Marshall Space Flight Ctr. (United States) 2California State Univ., Northridge (United States) 3Univ. of Alabama in Huntsville (United States)
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This paper will describe the evolution of the Marshall Space Flight Center's (MSFC) electro-optical polarimeter with emphasis on the field-of-view characteristics of the KD*P modulator. Understanding those characteristics was essential to the success of the MSFC solar vector magnetograph. The paper will show how the field-of-view errors of KD*P look similar to the linear polarization patterns seen in simple sunspots and why the placement of the KD*P in a collimated beam was essential in separating the instrumental polarization from the solar signal. Finally, this paper will describe a modulator design which minimizes those field-of-view errors.
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E. A. West, G. A. Gary, M. Noble, D. Choudhary, B. Robinson, "Large field-of-view KD*P modulator for solar polarization measurements," Proc. SPIE 5888, Polarization Science and Remote Sensing II, 588806 (18 August 2005); https://doi.org/10.1117/12.613240