p(h)=1013,25 \; ( 1 \; - 2,257×10^{-5} \; h)^{5,2586}

(h \; en \; m \; , \; p \; en \; hPa)

Formule de la pression en fonction de l'altitude 
en atmosphère standard dans la troposphère

Basses  \; couches \; :
  h  < 10  \; 000 \;  ft \; ≅ \; 3000 \; m

pression (hPa)

altitude (m)

pente \; de \; la \; tangente \; au \; point \; mobile \; M

p(h) = If[0 ≤ h ≤ 11000, (1013.25 * (1 - ((2.257 * 10^(-5)) * h))^(5.2586))]
a: p(0)
b: p(11000)
A: (0, a)
B: (11000, b)
f = Line(A, B)
M = Point(p)
g = Tangent(M, p)
D: M + (1000, 0)
h = Line(D, yAxis)
E = Intersect(p, h)
l = Length(Segment[D, E])
m: 1000 / l
n: floor(m / 0.3048)
F = Midpoint(M, D)
G = Midpoint(D, E)
i = Tangent(A, p)
H = Point(i)
I = Point(i)
J = (4000, 1100)
K = (9551.294343240646, 1099.999689516216)
L = (9559.140843720023, 898.502050538015)
M_1 = (4000, 900)
q1, j_1, k_1, l_1, m_1 = Polygon(J, K, L, M_1)
C = (9702.780441035486, 766.7048527157959)
j = Tangent(M, p)
N = Intersect(j, yAxis)
O = Intersect(j, xAxis)
q: y = 200
P = Intersect(j, q)
k = Segment(N, P)
c = Slope(j)
d: 1 / c
e: d / 0.3048
pente: (-e)
conv: (-d)
texte2: "-1 \; hPa  \; pour \; " + (LaTeX[pente]) + "\; ft \; ≅ \; " + (LaTeX[conv]) + "\; m"
Q = Point(yAxis)
R = (2984.659635666351, 1132.2576037982558)
S = (2984.659635666351, 101.95835543802093)
T = Point(yAxis)
q2, q_1, r, s, t = Polygon(Q, R, S, T)
U = Point(k)
V = (5000, 700)
u = Vector(V, U)
o: x(M)
v: y(M)
texte3: "(" + (LaTeX[o]) + " \; m \; ;" + (LaTeX[v]) + " \; hPa)"