# TPP v.1.1.16.1 updated 1.11.2023

> Source: https://topodrone.com/knowledge/topodrone-post-processing/tpp-v11161-updated-1112023/
> Section: TOPODRONE Post Processing
> Updated: 2025-06-30

If paid support expired before 01.11.2023, this TOPODRONE Post Processing version will not work for a user. It is necessary to either pay for support or download previous version distributive, the release date of which is earlier than the expiration date of paid support.

Get the distribution: [TOPODRONE Software Distributor](https://file.topodrone.com/TOPODRONE%20SD.exe)

+ **Added:** combined Kalman filter enabled by default, improves accuracy of GNSS calculations (in PPK/SPPP/PPP modules).