beträffande rymdprojektiler över svenskt territorium

This memorandum, dated December 1946, details the Swedish military's response to reports of 'peculiar light phenomena' (sär egna ljusfenomen) observed over Swedish territory. The Defense Staff (Försvarsstaben) first became aware of these phenomena on May 23, 1946, through press reports and direct civilian accounts. By July 8, 1946, approximately thirty reports had been received, including information from the military attaché in Finland. Following a surge in sightings on July 9, 1946—where approximately 250 reports were filed—the military established a committee on July 10, 1946, to manage the investigation. This committee included representatives from the Defense Staff, Air Staff, Naval Administration, Air Administration, the National Defense Research Institute (FOA), and the National Defense Radio Institute (FRA), chaired by Colonel B. Jacobsson. The committee organized intensified surveillance, including the collection and analysis of reports by the Air and Air Defense Department, and dispatched personnel to verify significant sightings. Military units were tasked with searching for suspected impact sites, and coordination was established with civilian authorities, such as the customs and pilot services and the Stockholm Observatory. Radar surveillance (ekoradiospaning) was initiated on July 24, 1946, using ERstn type III b stations, though the document notes that personnel shortages and equipment limitations prevented continuous, round-the-clock operation. Surveillance efforts were also conducted by the Navy and the FRA. By December 1, 1946, a total of 973 reports had been compiled, with the frequency of sightings peaking in August and September before declining in October and November.