TY - RPRT TI - Frequency-Dependent Acoustic Reflection Coefficients of Flat Ground Assessed Using the Sonic Boom From the OSIRIS-Rex Sample Return Capsule Recorded on Free Flying Balloons AU - Bowman, Daniel C [Pacific Northwest National Laboratory] AU - Lees, Jonathan [University of North Carolina at Chapel Hill] AU - Krishnamoorthy, Siddharth [Jet Propulsion Laboratory] AU - Silber, Elizabeth Allaryce [Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)] (ORCID:0000000347781409) AU - Fleigle, Michael Joseph [Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)] (ORCID:0009000309778951) AU - LaPierre, Justin Robert [Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)] (ORCID:0000000193776331) PY - 2026 DO - 10.1029/2025gl121468 UR - https://www.osti.gov/biblio/3376525 ID - 3376525 ER -