Location： User Support > GLONASS Feedback
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Test and Assessment Research Center (TARC) of China Satellite Navigation Office is the GLONASS user feedback channel authorized by Roscosmos. If you have any questions about the Russian GLONASS system, you can give feedback through the BDS's question feedback channel. We will promptly communicate with Roscosmos and answer your questions. Contact us: 010-88105942 or 010-88105943 , firstname.lastname@example.org.