Various aspects of the present disclosure generally relate to vehicle sensors. In some aspects, a device associated with a vehicle may obtain, from an external source, calibration data including a first set of measurements related to a position of one or more objects in a reference frame associated with the external source. The device may identify a second set of measurements related to the position of the one or more objects within a field of view of one or more onboard sensors, and update a calibration table based at least in part on a comparison of one or more of the first set of measurements and one or more of the second set of measurements that are most time-aligned. Accordingly, the device may convert sensor-derived location information from a source reference frame to a reference frame associated with the vehicle using the updated calibration table. Numerous other aspects are provided.