- no color, no turbulence 
- green means light turbulence,

- yellow predicts light to moderate turbulence,
- red indicates moderate to strong turbulence,
- purple indicates strong or very strong turbulence 

In the lower altitudes, arrows describe the strength and direction of the wind. this arrow shows a direction (the wind comes from the North-West), and gives an intensity: a long line means 10 knots of wind, a half-line is 5 knots. here we will have a northwesterly wind for 25 knots, equal to 50 km / h.

It's amazing features and similarities to Earth have made it an exciting destination for unmanned crafts for over 50 years.56 missions have been launched to the Red planet wich were designed to explore the surface of the planet. 

There is of course a faster way to do it : Flight, but complains in fly on Mars,planes uses thrust to create lift on the wings by effectively pushing down air to overcome the force of gravity on. On earth, planes achieve thrust by burning fuel with oxygen from the atmosphere.Because Mars doesn't have any significant amounts of oxygen in its atmospehere ( 0.146 % from the composition of the atmosphere), it results by the fact that an airplane sould bring its own supply like electric motor for example, Thereby severely limiting the range of any aircraft. The atmosphere on Mars is less than 1 % of thickness that on earth meaning a lot more thrust and speed is needed to create the same amount of lift as on earth but Mars only has about one-third the gravitational pull of earth, slightly reducing the required thrust. 

It truns out that the speed required to generate enough lift for a light aircraft on Mars is around «  The speed of Sound » , equivelent to 1 200 km/H, compared to just 100 km/H on Earth. At that speed, turning becomes a problem because the planes have massive amounts of inertia and the wings don't have enough drag to change the direction of the flight.This means plane turns but the direction of flight doesn't change resulting in a horrible crash at the speed of sound.

Nasa and other space agencies are seriously considering the use of balloons. Balloons are much cheaper to produce and importantly can cover a lot more area concept of Mars planes. It can be flying in order of several months completing several trips around the entire planet.

Needless to say, none of these missions ever went ahead, this is because they can't do what Rovers have been trying to do ever since they landed on Mars. 

Finding life on another planet would arguably be the most important scientific discovery ever.