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National Advisory Committee for Aeronautics, Report - Altitude Pressure Tables Based on the United States Standard Atmosphere

The altitude-pressure tables of the United States stand-
ard atmosphere gieen in Technical Report No. 246‘ (ref-
erence 1) are reprinted since that report is out of print.
Advantage is taken to make certain revisions in the text
and particularly to extend the altitude range of the tables
from 50,000 to 80,000 feet. These tables include: (I) Alti-
tude in feet at pressure intervals of 0.1 millimeter of mer-
cury in the range 20 to 200 millimeters of mercury and at
intervals of 0.2 millimeter of mercury in the range .900 to
7.90 millimeters of mercury; (II) altitudes in feet at pres-
sure interuals of 0.01 inch of mercury in the range 0.8 inch
to 31.09 inches of mercury; and (IID pressures in both
millimeters and inches of mercury and air temperatures
for every 500-foot interval in the altitude range —1,000 to
50,000 feet and for every 1,000-foot interval up to 80,000
feet. The mean temperature of the air column is given for
each of the altitudes in table III up to 50,000 feet.

The work was carried out at the National Bureau of
Standards, in part with the cooperation and financial
assistance of the National Advisory Committee for Aero-
nautics.

A standard atmosphere is essential in aeronautics as
a standard of reference in evaluating the performance
of aircraft and in calibrating altimeters. The standard
atmosphere now in general use in the United States was
officially adopted in 1925 by a group of Government
organizations interested in aeronautics. For a more
complete discussion of the details of establishing this
standard atmosphere see Technical Reports Nos. 147,
218, and 246 (references 1, 2, and 3).

The tables especially convenient for the use of the
standard atmosphere in calibrating altimeters are
given in Technical Report No. 246 (reference 1), but
unfortunately that report is out of print. To make
these essential tables available a reprint in some form
is believed advisable.