Key facts
- Spacecraft
- Plato (terrestrial planet hunter)
- Test facility
- Maxwell Test Chamber at ESTEC
- Test type
- Electromagnetic compatibility
- Chamber height
- 9 m
- Launch vehicle
- Ariane 6
- Planned launch date
- March 2027
Background
The European Space Agency's terrestrial planet hunter Plato has recently completed a series of key tests inside the Maxwell Test Chamber at ESTEC, demonstrating that its electronic equipment is fit to work in space.
The Maxwell Test Chamber is a shielded enclosure with conducting metal walls, floor, and ceiling that form a Faraday cage, screening out all external interference. Its 9 m-high interior is lined floor to ceiling with foam spikes that absorb electrical signals and sounds to mimic the void of space.
Once the chamber was sealed closed, engineers remotely switched on and commanded Plato's electronic equipment. They ran a series of tests to ensure that the spacecraft's complex instruments and modules did not interfere with each other or with the communication systems, creating unwanted 'crosstalk'.
Current situation
In the extreme vacuum of space, a spacecraft's electronics can behave differently than they do in a typical test lab on the ground. Without proper testing, this can have unforeseen consequences that could affect the mission's goals or even damage the equipment.
Thanks to the tests run in the Maxwell Test Chamber, engineers verified that Plato's many electronic systems can work together in space without interference – in other words, that they are electromagnetically compatible.
With compatibility checked off, Plato has now cleared the last remaining major exam in the series that the spacecraft must undertake to graduate for launch.
| Test | Start date | Duration | Outcome |
|---|---|---|---|
| Vibration and acoustic tests | January 2026 | Not specified | Completed |
| Large Space Simulator tests | After January 2026 | One month | Completed |
| Electromagnetic compatibility tests | Recently | Not specified | Completed |
Impacts
The successful completion of these tests means that Plato is on track for its planned launch. The spacecraft will lift off on an Ariane 6, with the launch planned by Arianespace for March 2027.
The tests started back in January this year with vibration and acoustic tests, followed by a month-long stay inside the Large Space Simulator where Plato aced a demanding set of tests and demonstrated that it is fit to withstand the harsh conditions of space.
These milestones are critical for the mission's timeline, as any delay in the test campaign could have pushed back the launch date.
Future outlook
Scenario analysis: The possibilities below are not certain predictions.
If the remaining preparations proceed as planned, Plato could be launched in March 2027 as scheduled. However, any unforeseen technical issues during final integration or launch campaign could delay the launch.
Once in space, Plato is expected to begin its mission of hunting terrestrial planets. If the spacecraft performs as designed, it may provide valuable data on exoplanets, but if any systems fail, the mission's goals could be affected.
The success of these tests increases confidence in the spacecraft's readiness, but the ultimate outcome will depend on the actual launch and subsequent operations.
Source: European Space Agency
