Updating firmware on a 1970s device is a rare feat, especially when that device is located outside our solar system. The JPL team responsible for the Voyager 1 & 2 missions is currently sending fresh firmware patches to these incredible engineering accomplishments. These patches aim to resolve the attitude articulation and control system (AACS) issues that previously disrupted Voyager 1’s communication with Earth and prevent quick clogging of the thruster propellant inlet tubes.
To ensure the success of the patches, Voyager 2 is being used as a testbed. Despite months of Earth-based checks, tests, and validations, there is still a possibility of something going wrong. While Voyager 1 holds more valuable scientific data being farther from Earth, both spacecraft should emerge unscathed after this maintenance session.
The AACS fixes act as an insurance policy, as the root cause of the issue was determined to be the AACS entering an incorrect mode, although the exact reason remains unclear. With the implementation of these changes, recovery should be much smoother. Additionally, the adjustments to the thruster usage are relatively minor, mainly allowing the spacecraft to drift slightly before engaging the thrusters. This reduction in total firings will minimize the accumulation of material in the inlet tubes.
By implementing these changes, both spacecraft’s antennas should remain correctly aligned towards Earth, the blue planet they left behind over forty-five years ago. This should allow them to hopefully reach the milestone of half a century in space before those of us still listening bid them our final farewells.
