Wellbore Survey Tool Using Coriolis Vibratory Gyroscopic Sensors

Various implementations described herein may refer to a wellbore survey tool using Coriolis vibratory gyroscopic sensors. In one implementation, a method may include receiving one or more reference values corresponding to the Earth's rotation rate and one or more reference values corresponding to a local latitude of a survey tool disposed in a wellbore. The method may also include receiving rotation rate measurements from one or more quartz Coriolis vibratory gyroscopic (CVG) sensors of the survey tool. The method may further include determining bias-corrected rotation rate measurements using one or more statistical estimation processes and based on the one or more reference values corresponding to the Earth's rotation rate, the one or more reference values corresponding to the local latitude, and the rotation rate measurements. The method may additionally include determining azimuth values of the survey tool based on the bias-corrected rotation rate measurements.