Plan first, evidence later
In a 2022 JPL interview, rover operator Vandi Verma describes sketching a drive, translating it into commands, reviewing it and simulating it against terrain. That establishes the intended sequence and a predicted outcome. It does not show what the real rover has already done. [1]
- Before: review and simulate the commands
- During: the rover executes out of sight
- After: inspect returned images and data
The wait is part of the job
The transcript explains that Earth and Mars are too far apart for real-time joystick driving. After sending a plan, operators wait for returned data and images to learn whether the rover performed the requested actions. The interview is historical background, not a report of today’s rover location. [1]
Three different statements
Our interpretation: “We sent the plan,” “the simulation reached the destination,” and “returned evidence confirms the drive” answer different questions. Keeping those statements separate makes a progress report more useful than a single unexplained success label.
Go a little deeper
Optional reading · about 1 more minute
A small example of the distinction
Hypothetical example: A rover is asked to approach a rock. A successful simulation supports sending a plan. Until observations return, it remains possible that the physical execution differed. Compare the returned evidence with the intended destination before describing the approach as complete. This is an invented teaching example, not an incident report.
Planning includes what could go wrong
Verma describes planning an entire Martian day’s driving and anticipating problems in advance. The interview also discusses ground-level images and orbital maps used to understand terrain. Those inputs help explain why planning is substantive engineering work even before confirmation arrives. [1]
Original sources
Attributed synthesis, not original reporting. Examples labeled hypothetical or illustrative are explanatory. Reviewing a source does not independently validate its findings.
- JPL: How to Drive a Mars Rover ↗
August 25, 2022 episode transcript, opening through 6:15 read October 6, 2026. Historical operating explanation; not current mission telemetry.