The lander would ultimately be destroyed by crashing into the lunar surface.
The first is an estimate of its location produced by something called an inertial measurement unit, or IMU, controlled by gyroscopes and accelerometers. The second consists of a laser rangefinder, which measures the actual distance between the robot and the moon’s surface.ispace engineers discovered that there was a conflict between these two sources of data: the estimated altitude over the Moon and the distance reported by the laser rangefinder recorded a difference of about 5 km .
ispace chief technology officer Ryo Ujiie noted that this fatal discrepancy came from a last minute decision to move the robot’s target landing site from a flat plain on the Moon called Lacus Somniorum to the Atlas crater.
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