contrails: force high visibility for debugging

config.js

@@ -204,11 +204,11 @@ window.CONFIG = {
         wStrip: 1,
         // Contrails: contrailChance of the aircraft leaves a trail once
         // above contrailStartKm, visible for contrailLifeS seconds.
-        contrailChance: 0.85,
+        contrailChance: 1.00,
-        contrailStartKm: 6,
+        contrailStartKm: 4,
-        contrailLifeS: 300,
+        contrailLifeS: 600,
-        contrailWidthM: 620,      // full trail width
+        contrailWidthM: 1400,     // full trail width
-        contrailFadeKm: 100,      // fully faded at this distance (ramp starts at 35 %)
+        contrailFadeKm: 300,      // fully faded at this distance (ramp starts at 35 %)
         // Night contrast: a physically scaled contrail is a faint grey thread
         // that disappears at 4x pixel scale, so this is the night share of its
         // opacity (0.34 was the old value) and it also drives the gain on the