70,000 21,336
5%
.06PSI
33.7mm Hg
1.32inHg
-70F
-57C
65,000 19,812
6%
.90PSI
47.0mm Hg
2.13inHg
-70F
-57C
60,000 18,228
8%
1.0PSI
54.2mm Hg
2.13inHg
-70F
-57C
55,000 16,746
10%
1.3PSI
68.9mmHg
2.7inHg
-70F
-57C
50,000 15,240
13%
1.7PSI
87.5mmHg
3.4inHg
-70F
-57C
45,000 13,716
16%
2.1PSI
111.1mmHg
4.3inHg
-70F
-57C
40,000 12,912
21%
2.7PSI
141.2mmHg
55.inHg
-70F
-57C
35,000 10,668
26%
3.5PSI
179.3mmHg
7.0inHg
-69F
-56C
30,000
32%
4.4PSI
226.1mmHg
8.9inHg
-48F
-44C
-30F
-34C
9,114
25,000
7,620
39%
5.5PSI
282.4mmHg
11.2inHg
20,000
6,096
48%
6.8PSI
349.5mmHg
13.76inHg
-12F
-24C
15,000
4,572
58%
8.3PSI
429.0mmHg
16.89inHg
5F
-15C
23F
-5C
10,000
3,048
70%
10PSI
522.7mmHg
20.58inHg
5,000
1,524
84%
12.2PSI
632.5mmHg
24.9inHg
41F
5C
0
0
14.7PSI
760mmHg
29.92inHg
59F
15C
Altitude
in Feet
Altitude
in Meters
100%
Percent of Atmospheric Temperature
Oxygent
Pressure
in F and C
Compared
in PSI
to Sea Level and Hg
Spy jet
pacificspaceflight.com
FL650 Expedition balloon target altitude - Summer 2015
Armstrong Line; the physiological barrier beyond which humans must wear a space suit
Breathing 100% oxygen at this altitude equal to breathing normal air at 10,000’
STRATOSPHERE
Commercial jets
Mt. Everest Summmit
Highest clouds
TROPOSPHERE
Pacific Spaceflight balloon target altitude - Summer 2014
Most Aviation Decompression Sickness symptoms appear above this altitude
Pacific Spaceflight / Copenhagen Suborbitals Altitude Chamber Test - Summer 2013
Aviators must breathe oxygen-supplemented gas above this altitude (10,000’_
Empire State Building
Deepest SCUBA dives
Operational Region of 2013-2015 Pressure Suit
Operations
Pacific Spaceflight / Copenhagen Suborbitals
CM Smith 2014