Barometric Altimeter Assisted SINS/DR Combined Land Vehicle Gravity Anomaly Method

TL;DR

This paper introduces a novel altimeter-assisted SINS/DR method for land vehicle gravity anomaly measurement, overcoming satellite navigation limitations and achieving accuracy comparable to traditional methods, with an 11% improvement over SINS/DR.

Contribution

The paper presents a new altimeter-assisted SINS/DR integration approach that enhances gravity measurement accuracy in environments where satellite navigation is unreliable.

Findings

Achieves 2.005 mGal measurement accuracy after filtering.

Provides comparable accuracy to SINS/GNSS integration.

Improves accuracy by approximately 11% over SINS/DR.

Abstract

Traditional land vehicle gravity measurement heavily rely on high-precision satellite navigation positioning information. However, the operational range of satellite navigation is limited, and it cannot maintain the required level of accuracy in special environments. To address this issue, we propose a novel land vehicle gravity anomaly measurement method based on altimeter-assisted strapdown inertial navigation system (SINS)/dead reckoning (DR) integration. Gravimetric measurement trials demonstrate that after low-pass filtering, the new method achieves a fit accuracy of 2.005 mGal, comparable to that of the traditional SINS/global navigation satellite system (GNSS) integration method. Compared with the SINS/DR integration method, the proposed method improves accuracy by approximately 11%.