A High Sensitivity VDFLL Utilizing Precise Satellite Orbit/Clock and Ionospheric Products

F. Xu, Y. Gao

Abstract:	In the VDFLL, the ranging errors will degrade the positioning accuracy as well as the tracking performances. In the paper, a new VDFLL tracking loop minimizing the ranging error by utilizing precise satellite orbit/clock and ionospheric products has been proposed. Unlike the conventional VDFLL, which treats all the measurement errors as zero-mean Gaussian noise with a high variance, the new VDFLL will first reduce the biases using precise satellite orbit/clock and atmospheric delay data and then assign a lower measurement error variance in the EKF. With reduced ranging errors, the positioning accuracy is improved more than 30% and the ranging error and tracking sensitivity of tracking loop are improved by around 3dB.
Published in:	Proceedings of IEEE/ION PLANS 2012 April 24 - 26, 2012 Myrtle Beach Marriott Resort & Spa Myrtle Beach, South Carolina
Pages:	38 - 43
Cite this article:	Xu, F., Gao, Y., "A High Sensitivity VDFLL Utilizing Precise Satellite Orbit/Clock and Ionospheric Products," Proceedings of IEEE/ION PLANS 2012, Myrtle Beach, South Carolina , April 2012, pp. 38-43. https://doi.org/10.1109/PLANS.2012.6236862
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