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@ -12,6 +12,20 @@ SPDX-FileCopyrightText: 2011-2023 Carles Fernandez-Prades <carles.fernandez@cttc
All notable changes to GNSS-SDR will be documented in this file.
## [Unreleased](https://github.com/gnss-sdr/gnss-sdr/tree/next)
### Improvements in Repeatability
- A Kalman filter is now available in the PVT block, smoothing the outputs of a
simple Least Squares solution and improving the precision of delivered fixes.
It can be enabled by setting `PVT.enable_pvt_kf=true` in the configuration
file. The user can set values for the measurement and process noise
covariances with the following optional parameters (here with their default
values): `PVT.kf_measures_ecef_pos_sd_m=1.0`, in [m];
`PVT.kf_measures_ecef_vel_sd_ms=0.1`, in [m/s];
`PVT.kf_system_ecef_pos_sd_m=0.01`, in [m]; and
`PVT.kf_system_ecef_vel_sd_ms=0.001`, in [m/s].
## [GNSS-SDR v0.0.18](https://github.com/gnss-sdr/gnss-sdr/releases/tag/v0.0.18) - 2023-04-06
[![DOI](https://zenodo.org/badge/DOI/10.5281/zenodo.7805514.svg)](https://doi.org/10.5281/zenodo.7805514)