Documents regarding E2E communicatino protocol in RTCM3 format with STA9100MGA
This company is working together with Quectel to develop a hybrid navigation system with gnss and imu. The receiver module that Quectel provided(LG69TAB), did not come with a detailed description of its functinal safety implemantation. We are not sure if such document exist or it's also in developing stage.
Quectel once gave an intro which confirmed the existence of the following internal documents:

