Unexpected solu. quality degradation after adding '2L' frequency to config_f9p.py

[liusheng2020]

First of all, I would like to express my sincere gratitude for your excellent work. Your contributions have been incredibly helpful.

I ran the example data without any issues. When I switched to my own F9P data, it also worked fine (I made a minor modification because my base observations had 2W and 2X in the second frequency band, which would cause an error if not modified; the modification should not affect the program's solution). The minor modification is as follows :

The solution results are as follows (you can see that among the 1102 results, Q=1 accounts for 95.8%):

The above results were obtained using the unmodified src/config_f9p.py file from the repository.

However, when I added '2L': rSIG.L2L to the sig_tbl variable in the src/config_f9p.py file (considering that my rover observation file contains the 2L frequency band), the solution results all dropped to Q=2. As shown in the following image:

I am not sure why this happened. I have attached my data files below for your reference.

Thank you again for your time and effort. I look forward to your insights.

Best regards

myUbloxF9Pdata.zip