# On the Integration of VLBI Observations to GENESIS into Global VGOS Operations
## 4 Results
### Long-Term Frame Tie with GENESIS over 12 Months of Experiments  
To investigate the long-term frame tie accuracy, we combine multiple experiments into a global solution, estimating the parameters from a common adjustment of all available observations. The experiments are scheduled with the scheduling weight factors determined in Section 4.1 and the optimal MRT of 5 min determined in Sections 4.3 and 4.4. We simulate 24 h experiments following a cadence of two or three experiments per week. The experiments following the cadence of two experiments per week are performed on Monday and Friday. The experiments following the cadence of three experiments per week are conducted on Monday, Wednesday, and Friday. Following these cadences, experiments are conducted over a period of 52 weeks resulting in 104 and 156 experiments, respectively. Figure 14 shows the results of the derived frame tie with GENESIS over an extended period of time. The station position repeatabilities are derived by stacking the normal equations of multiple experiments of mixed schedules evaluated with the GENESIS processing. The values are given for networks A, B, and C with orbit errors of 0 cm (no orbit errors), 1 cm, 3 cm, and 5 cm. For each network, a cadence of 2 and 3 experiments per week over time periods of 3, 6, 9, and 12 months is shown. The number of conducted experiments is given as well.  
Compared to the results based on single 24 h experiments, the stacking of multiple sessions leads to significant improvements. As expected, with the increasing number of conducted experiments, the improvements are large at first and slow down with higher  
Figure 13: GENESIS performance with mixed schedules. For each network A, B, and C, the station position repeatability, number of scans, and number of observations are shown when analyzing mixed schedules with MRTs for GENESIS between 1 and 10 min in 1 min intervals. Orbit errors are simulated at different magnitudes at 0 cm (no orbit errors), 1 cm, 3 cm, and 5 cm. The analysis follows the GENESIS processing. The station positions are derived only from GENESIS observations. The number of scans and observations only refers to observations of GENESIS.  
numbers. For all three networks and orbit error levels, station position repeatabilities of below 1 cm can already be determined after 3 months with cadence 2. Similar to the results presented in Section 4.4, the size of the utilized network plays a large role in the results. In contrast to network A, the station position repeatability for network C improves with fewer numbers of experiments and performs better with larger satellite orbit errors. After 12 months of experiments, the differences between cadences 2 and 3 are small for orbit errors of 0 cm and 1 cm. However, with larger orbit errors of 3 cm and 5 cm, the additional experiments of cadence 3 become more important. With cadence 3 and orbit errors of 5 cm, the station position repeatabilities reach 3.6 mm, 2.9 mm, and 2.3 mm for networks A, B, and C, respectively. In contrast, the values are 4.5 mm, 3.5 mm, and 2.9 mm for cadence 2. Overall, the station position repeatability can be improved by a factor of about 10 after 12 months of experiments with cadence 2 or 9 months of experiments with cadence 3, as compared to the results from the single 24 h experiments.