The mean ceiling altitude, in both flights, was 32 km corresponding to 10 g/cm2.
This paper describes the details of the experiment, the detector characteristics, and the background behaviour at the ceiling altitude.
The observed background counting rate at the ceiling altitude of 4 mbs was ∼4 × 10−3 ct cm−2 s−1 keV−1 sr−1.
In order to establish the climatology of the stratospheric winds and study their inter-annual variability over Hyderabad for the turnaround periods, we have made a detailed analysis of the United Kingdom Meteorological office data between 2000 and 2007, to derive average wind parameters (magnitude, direction) at different ceiling altitudes above 38 km.
They use electrical waves to determine the distance from room ceilings (the helicopter loses altitude when it's less than 50cm away).
Occasionally, level legs of longer duration (>10 min) were flown (almost always near the ceiling of the aircraft's altitude range; Figure S2).
The operative altitude has estimated at 16 km and maximum ceiling of the system at 17 km.
When intercepted, the Cessna was over 1000 mile off course and flying at an altitude of 41600 feet, 5000 feet higher than its maximum certified ceiling, and the fighter pilots could not see anyone in the cockpit.
The observed rise in mean altitude for TBE corresponds with a mean ± SD rate of TBE ceiling (uppermost limit) rise of ≈5.4 ± 1.7 m yearly during the past 3 decades in the neighboring Czech Republic (2 ).
The instrument was launched in high altitude balloon flight on two different occasions, December 21, 2007, which reached a ceiling altitude of 4.3 mbs and April 25 , 2008reaching a ceiling altitude 2.8 mbs.
