S-values

S-values

Specific temperature anomalies given by the relation

where T is the actual temperature and T_p is the standard-atmosphere temperature at a point where the pressure altitude is z_p.

S-values are usually expressed in terms of tenths of degrees per hundred degrees absolute temperature. S-value lines are drawn on 4D charts because they are related to D-values by

where Δ_vD is the variation in D-value for a given Δz_p variation in pressure altitude.

• INDEX
• A
• B
• C
• D
• E
• F
• G
• H
• I
• J
• K
• L
• M
• N
• O
• P
• Q
• R
• S
• T
• U
• V
• W
• X
• Y
• Z
• 0
• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9

1. A gaseous envelope gravitationally bound to a celestial body (e.g., a planet, its satellite, or a star).

1. A measure (or condition) of height, especially of great height, as a mountain top or aircraft flight level.