Report regarding the phenomenon which could possibly be a 'ghost rocket'

This document is a report regarding an unidentified aerial phenomenon observed on August 10, 1946, at 21:57, by Rolf Moore and his wife. The observers were located on an open hillside near Strömningen 2, Sticklinge Udde, Lidingö, Sweden. The phenomenon was initially spotted in a north-northeasterly direction at an elevation of approximately 60 degrees. It traveled across the sky in a trajectory spanning about 50 degrees, moving toward the south-southeast. When the object reached a position nearly due east, it rapidly lost altitude and disappeared suddenly at approximately 20 degrees above the horizon. The entire event lasted less than two seconds. The estimated speed at the beginning of the trajectory was between 5 and 10 degrees per second. The report is associated with the National Defence Research Institute (Försvarets Forskningsanstalt), Department 3.