updated data_needed.MD with units and data description

data_needed.md

@@ -3,29 +3,29 @@
 
 ### AER STANDARD: ###
 
-    simulation parameters:
-        car speed
-        air density at the track
-        ride heights min and max (front and rear)
-        drag arm height min and max (?)
+    general parameters:
+        [km/h]  car speed
+        [kgpm3] air density at the track 
+        [mm]    ride heights min and ride height max, front/rear
 
     aero parame:
-        front and rear downforce
+        [mm]    drag arm height min and max TODO: verify what data exactly the program expects
+        [N]     front and rear downforce (X,Y,Z)
+        [N]     front and rear ride height drag (X,Y,Z)
 
 
 ### AER ADVANCED: ###
 
-    simulation parameters:
-        air density at the track
-        car frontal area
-        ride heights min and max (front and rear)
-        drag arm height min and max (?)
+    general parameters:
+        [kgpm3] air density at the track
+        [mm^2]  car frontal area TODO: verify unit  (mm^2 or m^2)
+        [mm]    drag arm height min and max TODO: verify what data exactly the program expects
 
     offset parameters:
-        speed threshold 
-        velocity offset reference
-        cz
-        BALANCE_Z (?)
+        [km/h]  velocity threshold 
+        [km/h]  velocity offset reference
+        CZ
+        BALANCE_Z TODO: verify what does it mean
         CX body/front/rear
 
     aero and dynamics parameters (body/front/rear and angles):
@@ -34,4 +34,4 @@
         roll 
         steering angle 
         front and rear ride height 
-        wind effect (angle and speed)
+        wind effect (angle [deg] and speed[km/h])