TELEMETRY OF THE FIRST AMERICAN IN ORBIT.
Telemetry chart produced on a drum plotter, six measurements plotted in ink on graph paper, annotated, 16 by 147 inches.
SIGNED BY JOHN GLENN. This telemetry covers the initial minutes of his historic orbital flight in 1962, Mercury 6. Measurements are for engine start booster, sustainer, respiration, EKG (2 measurements) and acceleration (G-force). Annotated on the read-out are the booster cut-off, sustainer cut-off, the capsule's yaw and pitch, the reverse of the capsule direction, G-force reaching mark 5, and the first and second pass. Glenn's heart rate understandably increases during the launch.