atmosphere: fix pressure calculation (convert km to m)

doc/research.md

@@ -79,10 +79,10 @@ Based on Figure 27 from SRC1, and Figure 28 using the middle of the 3 temperatur
 
 ### Regression analysis
 
-- 350km-850km: `p[bar](a[km]) = e^(-8.0920583983 - 0.0066339143 * a)`
-- 50km-350km: `p[bar](a[km]) = e^(-0.969198983 - 0.027000953 * a)`
-- -125km-50km: `p[bar](a[km]) = e^(0.0626589359 - 0.0473755348 * a)`
-- <-125km: `p[bar](a[km]) = -715.5577817531 * a - 89044.7227191413` (low-effort linear regression assuming p(-70000km) = 5e7 bar)
+- 350km-850km: `p[bar](a[m]) = e^(-8.0920583983 - 0.0000066339143 * a)`
+- 50km-350km: `p[bar](a[m]) = e^(-0.969198983 - 0.000027000953 * a)`
+- -125km-50km: `p[bar](a[m]) = e^(0.0626589359 - 0.0000473755348 * a)`
+- <-125km: `p[bar](a[m]) = -0.7155577817531 * a - 89044.7227191413` (low-effort linear regression assuming p(-70000km) = 5e7 bar)
 
 ### Designing the in-game atmosphere
 

src/nature.rs

@@ -278,11 +278,11 @@ pub fn jupiter_altitude_to_pressure(altitude: f64) -> f64 {
     if a >= 1e6 {
         return 0.0;
     } else if a >= 350e3 {
-        return (-8.0920583983 - 0.0066339143 * a).exp();
+        return (-8.0920583983 - 0.0000066339143 * a).exp();
     } else if a >= 50e3 {
-        return (-0.969198983 - 0.027000953 * a).exp();
+        return (-0.969198983 - 0.000027000953 * a).exp();
     } else if a >= -125e3 {
-        return (0.0626589359 - 0.0473755348 * a).exp();
+        return (0.0626589359 - 0.0000473755348 * a).exp();
     }
-    return -715.5577817531 * a - 89044.7227191413;
+    return -0.7155577817531 * a - 89044.7227191413;
 }