Final answer:
The error from GNSS signals bouncing off objects near a receiver is called multi-path error, which leads to inaccuracies in calculated positions.
Step-by-step explanation:
The type of error caused by GNSS signals bouncing off of nearby objects near a receiver is known as multi-path error. This phenomenon occurs when signals transmitted from satellites reflect off surfaces such as buildings or large rock formations before reaching the receiver, causing interference and inaccuracies in the positional information. Although the signal does not drift in frequency due to the relative motion of the source and receiver (a phenomenon known as the Doppler effect), the reflected signal takes a longer path to reach the receiver, leading to errors in the calculated position.