Basing jumping off either Deimos or Phobos, the two moons of Mars, and landing on Mars would not be possible in the way that base jumping is typically understood. Base jumping involves jumping from a fixed object, such as a building or a cliff, using a parachute to slow down the descent and safely land on the ground.
In the case of Deimos and Phobos, these moons have extremely weak gravitational fields compared to Earth. Deimos has about 1/1000th the gravity of Earth, and Phobos has even less. Due to their weak gravity, if you were to jump off either of these moons, you would not experience the same kind of freefall and acceleration that base jumpers experience on Earth.
Additionally, landing on Mars itself would pose a significant challenge. Mars has a thin atmosphere, which means that parachutes would not provide sufficient drag to slow down a descent from a moon to the planet's surface. The lack of atmospheric drag would make it difficult to decelerate and land safely.
If you were to somehow manage to descend from Deimos or Phobos to Mars, you would need a spacecraft or a landing vehicle specifically designed for that purpose. Such a vehicle would require propulsion systems and a means to protect you from the extreme heat generated during atmospheric entry.
In summary, while the idea of base jumping from a moon to land on a planet might seem exciting, the reality is that it is not feasible with our current understanding of physics and technology.