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The Roswell Report: Fact versus Fiction in the New Mexico Desert was published by Headquarters United States Air Force in 1995. The Black Vault distributes this copy. It reproduces the report by Col. Richard L. Weaver and the synopsis by 1st Lt. James McAndrew, both written after a General Accounting Office inquiry requested by Representative Steven Schiff. The Air Force search found no evidence of an extraterrestrial craft or crew. It concluded that the Roswell debris most likely came from NYU Flight No. 4, a Project MOGUL balloon train.
“Headquarters”32 pages
## (2) Codesonde The modified radiosonde built by Brailsford and Co., Rye, New York, called the codesonde, has been found valuable when knowledge of small variations in the height of the balloon is not required. Using this system, a radio transmitter is modulated by a Morse code signal which is a function of pressure (and temperature if desired). This system is useful for tracking a balloon with aircraft since no recording equipment is necessary for data interpolation. Each combination of dots or dashes may be identified by ear, and with a calibration chart, the pressure which corresponds to the balloon's height may be thus determined by anyone who can read Morse code with a suitable radio receiver. The advantages of using this system for a balloon which is to be followed by aircraft include the fact that it is necessary to receive only one complete code group to completely identify the pressure level of the balloon. It is thus possible to interrupt the period of reception without permanently losing the altitude record. It is expected that a balloon transmitter which can be followed with an aircraft radio compass will be used in conjunction with this pressure modulator, giving three-dimensional position data. ## (3) Barograph Many balloon flights pass out of the range of even a network of receiving stations. When it is not possible, because of weather or other considerations, to follow the balloon with aircraft, a clock-driven meteorograph may be added to the flight train to record data, such as pressure and temperature. It is necessary to recover the balloon equipment to evaluate this sort of record. With inland release points, it has been possible to recover about 75% of all flights. The model U-48 Lange barograph, shown in Figure 35, is designed to give a record of atmospheric pressure and the temperature of the barograph case. In order to obtain a maximum spread of the pressure record in the range at which the data is most useful, the linkages are arranged so that recording begins at about 500 millibars or around 19,000 feet, and may be continued as high as the balloon rises. The
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