Static Baseline Estimation Using NavIC Pseudoranges: A Long-Term Study

Abstract

We assess the estimation accuracy for two static baselines (350 m and 8 km) with NavIC L5 double-differenced (DD) pseudoranges using weighted and recursive least-square techniques for a day. Additionally, we analyze the 350-m baseline for a span of 9 months. The mean of the 3D residual sum-of-squares (RSS) error for the 350-m baseline using least-square error is 2.72 m with 1σ of 2.08 m for the 24-h duration. With the recursive technique, the mean and 1σ of the 3D RSS error reduce to 46 and 24 cm, respectively. For an 8-km baseline, the 3D RSS error mean and the standard deviation are 2.71 m and 1.72 m, respectively. Compared to NavIC’s baseline estimation accuracy, the 3D RSS error mean using GPS L1 DD pseudoranges for the 350-m and 8-km baselines are 1.13 m (1σ= 0.64 m) and 1.63 m (1σ = 0.78 m). © 2021 IETE.