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Getting ready for Juice’s daring double flyby

July 19, 2024
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Getting ready for Juice’s daring double flyby
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Subsequent month, ESA’s Jupiter Icy Moons Explorer (Juice) will perform the primary mixed lunar-Earth flyby. Preparations are beneath means at ESA mission management for this extremely exact manoeuvre, which can harness the gravitational forces of the Moon and Earth in fast succession to line Juice up for the following stage of its journey to Jupiter.

Squeezing essentially the most out of Juice’s return to Earth

Juice is Europe’s first mission to the Jupiter system. To achieve its distant goal, the spacecraft will perform a sequence of manoeuvres referred to as gravity assists, flybys, swingbys or slingshots.

These manoeuvres change a spacecraft’s velocity and trajectory utilizing the gravity of a big object similar to a planet or a moon. They preserve gasoline and permit the spacecraft to be filled with as many scientific devices as potential for the exploration of distant worlds.

Juice’s first gravity help is especially complicated as it’s truly two flybys back-to-back. The lunar-Earth flyby will see Juice move simply 700 km from the Moon’s floor at 23:16 CEST on 19 August and 6807 km from Earth’s floor virtually precisely 24 hours later at 23:57 CEST on 20 August.

Juice’s lunar-Earth flyby: the entire path

Utilizing the gravity of the Moon to barely bend Juice’s trajectory first will enhance the effectiveness of the a lot bigger gravity help at Earth. Nonetheless, the twin flyby requires terribly exact navigation and timing, as even minor deviations may ship Juice within the incorrect route.

“For a typical gravity help, spacecraft operations should be extremely exact,” says Angela Dietz, Juice Spacecraft Operations Engineer. “For a double flyby, they should be pinpoint.”

Mission management prepared for motion

Groups from all throughout ESA’s ESOC operations centre have been known as to motion for Juice’s lunar-Earth flyby.

The Juice staff are at present performing a sequence of trajectory correction manoeuvres to fine-tune the spacecraft’s path because it approaches the Earth-Moon system and guarantee it arrives at precisely the proper angle and velocity.

Through the vital section, Juice will stay in near-constant contact with mission management by way of ESA’s community of deep area antennas

Through the vital section, the deep area antennas in ESA’s Estrack community will present a near-constant communication hyperlink with Juice.

The continual provide of real-time telemetry information will allow the flight management and flight dynamics groups to carefully monitor Juice’s place, velocity and trajectory, and quickly reply to any anomalies or deviations.

Through the Earth flyby, Juice will move inside the altitude of satellites in geostationary and medium-Earth orbits. ESA’s House Particles Workplace will scan Juice’s trajectory to make sure a protected passage free from different satellites or area particles.

After the lunar-Earth flyby, as Juice bids farewell to its residence planet for the second time, the groups will consider its new trajectory and perform any additional minor correction manoeuvres as wanted.

Getting ready for a spaceflight first

“A lunar-Earth flyby has by no means been tried earlier than,” says Angela Dietz. “There are dangers, however all of Juice’s onboard programs have been rigorously examined, and we’re effectively ready.”

The Juice flight management staff follow recovering the spacecraft within the occasion {that a} ‘protected mode’ is triggered whereas passing behind the Moon

“Because of the low altitudes, massive velocity adjustments and strict navigation necessities concerned, the flight management staff must be able to react at a second’s discover.”

“This week, we’re working a coaching marketing campaign to develop and rehearse the restoration procedures that we are going to use to get the spacecraft again on monitor as rapidly as potential if we encounter any anomalies.”

The Juice staff follow planning and executing an emergency trajectory correction manoeuvre

Through the current ‘dry run’ of the payload operations that can happen in the course of the double flyby, the flight management staff commanded Juice to function its varied cameras and scientific devices precisely as it should do throughout the true flybys to make sure that all programs behave as anticipated.

Juice’s devices are designed to review a planet and its moons, so the lunar-Earth flyby presents a uncommon alternative to check and calibrate them on related objects and put together them for his or her scientific actions at Jupiter.

In additional methods than one, the profitable execution of the primary lunar-Earth flyby will convey Juice one step nearer to unveiling the mysteries of Jupiter and its icy moons.

Comply with our Rocket Science blog and @ESA_Juice and @esaoperations on X for the most recent updates on Juice’s lunar-Earth flyby.

Discover out extra about how we put together for manoeuvres like Juice’s lunar-Earth flyby in our quick movie ‘The Burn’

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