roswell

given point in a cross-section through the atmosphere was
misleatling.
In order to avoid the suggestion of greater precision than was
warranted by·the character of the information available, it
21.
was decided, during the autumn of 1947 to present the meteorological
diagnoses in a different form. Since that time, graphs (in lieu
of cross-sections) have been constructed to show the vertical
distributions of the estimated ranges, that is to say, the estimated
extremes of temperature and wind on the whole or over a part of
the area involved in each experiment.
Since August, 1950, the principal task has been the preparation
of diagnoses of conditiona existing dt1ring experiments being con-
ducted regularly in eastern Colorado, western Nebraska and western
Kansas by the Industrial Research Institute of the University of
Denver. The design of these experiments necessitates a particularly
careful study of the available weather data and the exercise of
a considerable amount of synoptic ·meteorological judgment in the
preparation of the wind and temperature diagnoses.
F. Flights Utilizing the Constant Level Balloon System
After completion of the balloon control and telemetering development
phases of the projec~, the balloon systems were utilized under
Contracts AF 19(122)-45 and AF 28(099)-10, between this University
and the Air Force Cambridge Research Laboratories. A brief review
of these projects is as follows:
1. High Altitude Balloon Trajectory Study (Contract AF 19(122)-45)
Under the terms of this contract the Research Division was
commissioned to launch and track constant level balloon
systems in order to study -:dnd conditions at the 200 mb
level of the atmosphere. Flights were to remain afloat
until they h~d traveled approximately 1000 miles.
In order to track the balloon systems, the AM-1 trans-
mitter was operated at 1746 kc, using the radio compass
from an aircraft to "home in" on the balloon and position
it at specified time intervals. Information on pressure
altitude, ballast flow data and balloon, free air and
transmitter battery pack temperatures was transmitted
through the AM-1 to receivers mounted in the aircraft
and recorded on b~1sh recorders for analysis at New
York University.
A total of 22 flights (two of which crossed the Atlantic
Ocean and were recovered in Norway and Algeria) were