I've got to make a correction about the Project Sign. Since I wasn't clear in my previous post I want to specify that the date when Project Sign was
established is january 22, 1948 with the proposal of Nathan Farragut Twining, general of the Air Force. The document in this thread is about a report
sent to Wright Patterson AFB as part of the Project Sign.
Here is the estimate of the situation, part of the same document which I found it online:
Air Materiel Command (Project Sign) Estimate of the Situation
An Estimate of the Situation is just as the name implies: how intelligence personnel perceive the situation to be at the time the Estimate is written.
An EOTS is a common intelligence document for informing the command and staff of current thinking on an intelligence topic. Staff intelligence is
supposed to be able to give the commander and his subordinates an assessment of the situation at all times. Ten minutes after an EOTS is prepared it
may be superseded and made irrelevant by new information. As new information is added, such estimates are constantly revised or completely
rewritten.
Ruppelt dates the start of work on the AMC EOTS, which concluded that UFOs represented interplantery craft, from about the end of July, with
completion and dispatch about the end of September. His description of the physical appearance of the document and the contents of the EOTS are
similar to the "Analysis." When the "Analysis" was found, some felt this document was the one to which Ruppelt referred and he had "hyped" its
contents. Former Major Dewey Fournet confirmed the EOTS as described by Ruppelt did exist, and a copy survived in the USAF Intelligence files. From
the _Memorandum for Record_ by Fournet it would seem that as late as June, 1952, he was not aware of the existence of the EOTS. Several other
knowledgeable persons have referenced the EOTS or alluded to it. Fournet has said that the EOTS could probably be found in the Current Intelligence
Files or the Air Technical Intelligence Center (ATIC) files at the HQ, USAF.
Several incomplete searches have been made for this document. I recently searched the Directorate of Intelligence, TOP SECRET Current Intelligence
Files Branch 1946-1954, and all available ATIC documents at National Archives II. Current Intelligence files are not in chronological order. Most
everyone who has visited the archives has gone through these. I estimate about 40% of the material was withdrawn at time of declassification in
1987. Everyone had a say on withdrawal, CIA, DOD, USN, British Government, etc.
For more check the link:
1948 UFO DOCUMENTS: Background 
