TY - RPRT TI - Examining Periodic Solar-Wind Density Structures Observed in the SECCHI Heliospheric Imagers AU - Viall, Nicholeen M. AU - Spence, Harlan E. AU - Vourlidas, Angelos AU - Howard, Russell PY - 2010 UR - https://ntrs.nasa.gov/citations/20110015363 ID - 20110015363 ER -