TY - JOUR T1 - OBSERVATION AND THEORETICAL MODELING OF A REGION OF DOWNWARD FIELD-ALIGNED FLOW OF O+ IN THE WINTER DAYSIDE POLAR-CAP JO - J ATMOS TERR PHYS PY - 1985/01/01 AU - SMITH RW AU - WINSER KJ AU - VANEYKEN AP AU - QUEGAN S AU - ALLEN BT ED - VL - 47 IS - 5 SP - 489 EP - 495 Y2 - 2024/12/25 ER -