# Galileo Receiver Performance Analysis with New I/NAV Improvements Live Data +
## 4 Conclusions  
Table 2 presents the summary of the results of RS and RedCED features in receiver cold start conditions. Overall, there is an improvement in data demodulation time from 33-38% using RS and 53-60% using RS + RedCED in Open Sky and Urban conditions, which results in an improvement in the TTFF value. The improvements are particularly important in Urban environments where the visibility is reduced and the signal is lost, resulting in receiver position reset and re-fix. Note that, as described previously, the number of satellites used was filtered in order to compare coherently the performance of the new features with the legacy features using the same broadcasting satellites. Therefore, particularly in urban conditions, the visibility was reduced to 4-6 simultaneous satellites, which has a big impact on CED computations, resulting in an increase in the absolute value of TTFF. Nonetheless, this exercise is very useful for retrieving the relative improvement when using the new features.  
Comparing the obtained results with previously simulated data in [3], the values are in the expected range, confirming the simulated data with real data broadcast via the upgraded satellites.  
Figure 4: Comparison of legacy I/NAV to SSP time-to-time convergence: (**a**) Open Sky CDF, (**b**) Open Sky histogram, (**c**) Urban CDF, (**d**) Urban histogram.  
Table 3 presents the summary of the results of time convergence using SSP when time is provided within 3 s error. The results vary from 23 to 36% in improvement in both Open Sky and Urban environments. The new SSP feature will result in faster re-synchronization with the Galileo System Time (GST) for the connected (or assisted) users.  
Additionally, the presented results utilize a single-frequency signal, GAL E1B, which currently broadcasts the new features. However, please note that E5B is not currently broadcasting the new I/NAV features. If you use dual-frequency with E5B, it will enhance the performance of the legacy I/NAV system. This, in turn, will result in a reduced relative improvement when using RS and RCED.  
Conceptualization, R.D.N.; methodology, R.D.N.; software, R.D.N.; validation, R.D.N. and S.W.; formal analysis, R.D.N.; investigation, R.D.N.; resources, R.D.N.; data curation, R.D.N.; writing--original draft preparation, R.D.N.; writing--review and editing, S.W., N.S., S.S. and M.O.; visualization, R.D.N.; supervision, S.W., M.O. and N.S.; project administration, S.W., M.O. and N.S. All authors have read and agreed to the published version of the manuscript.  
This research received no external funding.  
Not applicable.  
The data presented in this study are available on request from the corresponding author. The data cannot be made publicly accessible as they are subject to internal restrictions imposed by a dedicated test campaign.  
The material and laboratory activities were supported by the ESA Navigation Laboratory. This work was also possible due to the support of the Galileo Receiver Team in EsteC: [PERSON], [PERSON], [PERSON], and [PERSON].  
The authors declare no conflicts of interest.