tokens: SDO is a mission of NASA's Living With a Star Program. This work used the DAVE4VM code, written and developed by P.W. Schuck at the Naval Research Laboratory. 3D rendering is due to VAPOR ( www.vapor.ucar.edu ) software. The authors sincerely thank Dr. T. Wiegelmann for providing NLFFF code. We acknowledge an extensive usage of the multi-node, multi-processor high performance computing facility at IIA. PV is supported by an INSPIRE grant of AORC scheme under the Department of Science and Technology. XC is supported by NSFC under grants 11303016. We thank the referee for constructive comments and suggestions that greatly helped to improve the manuscript.
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