ATLAS 2: launch of a balloon-probe with an ascent velocity that might vary
ATLAS 2 is a very particular mission: it's a flight where the velocity of the balloon-proble might vary during it's vojage.
The probe will be provided with a modulation system where in the initial fase of the flight, the module will travel with a high velocity, in the troposphere layer (by a forced inflation proccess of the balloon) and in the final phase the module will travel with a slower velocity (in the lower layer of the Stratosphere). The module is going to slow down with it's velocity by releasing part of the Helium contained inside the balloon with an attained altitude between 15 and 20 km's.
This solution allows to:
- Increase the ascent velocity of the balloon-probe in the class E airpsace (0-12km) to decrease the time and to avoid impact.
- limitate the air currents on the horizontal component regarding the ascent motion to decrease the operative ray of the mission.
- curtail the ascent motion in the atmospheric layer of a mayor sperimental interest (>12km) to maximalize the expose time of the sensors installed on board of the module, in atmospherical conditions.
With this configuration of the module it's not necessary to ask further authorizations for this mission.
For this reason the documentation was sent to the National Agency for Civil Aviation (ENAC) to evaluate the protocol to avoid any doubts.
According to Ten. Col. Colatoni at ENAC replied to our protocol by telling us that it re-enteres inside the free flight protocol.
This means that our project can proceed as expected.
We are grateful to thank Ten. Col. Colatoni for his cooperation.