TY - RPRT TI - Geopotential Field Anomaly Continuation with Multi-Altitude Observations AU - Kim, Jeong Woo AU - Kim, Hyung Rae AU - von Frese, Ralph AU - Taylor, Patrick AU - Rangelova, Elena PY - 2012 UR - https://ntrs.nasa.gov/citations/20120010508 ID - 20120010508 ER -