23857122-0457-180273-0113

HEADQUARTERS AIR MATERIEL COMMAND Wricht-Patterson Air Foroe Base Dayton, Ohio MC LAX0-3/HWS/rm Jan 5 1949 SUBJECT; Project "SIGN" TOs: Chief, Air Veather Service, #. An@rews Air Force Base, Washington 25, D. C. 4 RUT T rye ATTHE: Ss l. Project "SIGN" is responsible for the collection, investi- gation and interpretation of data relative to sighting of unidentified flyirg objects. Attached Incident Summaries 1 thru 172 from the files of Project "SIGN" are forwarded for study and recommendations as to which of the incidents may be eliminated as balloons released on routine synoptic ascents by the Air Weather Service, the Navy Aerological Service or the United States Weather Bureau. The summaries attached may be retained in your headquarters for working and reference purposes, 2. The Air Weather Service is the only agency of its type that has been asked to assist in the accomplishment of Project "SIGN" except that the United States Yieather Bureau has provided information on ball lightning. Research projects in which balloons are used and which are conducted or sponsored by the Army, Navy or United States Air Force are checked by the Intelligence Department of this Command. These checks areusually made direct from the Project "SIGN" Office, MCIAX0-3. These checks are distinct from the check of synoptic balloon flights made by weather service stations of the Air Force, the havy and the Department of Commerce. (U.S. Weather Bureau) requested of Air Veather Service. 3. It is the opinion of this office that the below listed inoi- dents are those having the sreatest possibility of being balloons. This list does not eliminate the possibility that many of the remaining incidents are balloons 2 2k 50 gl 113 155 3 25 52 92 115 156 L, 26 72 96 12 57 ll 30 73 10, Uy 159 uy, 31 Sy 105 1hé 163 16 32 &7 107 ,&,9 151 167 22 33 ug 112(Seel22) 154, 169 23 Ls my x} ‘ ug ‘A az ePOLULO met Declassification Authority: NND 57565