I just found it in InSim.txt doc,
struct OutSimPack
{
unsigned Time; // time in milliseconds (to check order)
Vector AngVel; // 3 floats, angular velocity vector
float Heading; // anticlockwise from above (Z)
float Pitch; // anticlockwise from right (X)
float Roll; // anticlockwise from front (Y)
Vector Accel; // 3 floats X, Y, Z
Vector Vel; // 3 floats X, Y, Z
Vec Pos; // 3 ints X, Y, Z (1m = 65536)
int ID; // optional - only if OutSim ID is specified
};
But what is the velocity format? km/h or miles per hour?
What are formats for other data?