id	summary	reporter	owner	description	type	status	priority	component	version	resolution	keywords	cc
98	help for BRDC Construction	regina.operation@…	stuerze	"Dear colleagues,

I would like to know how does the construction of BRDC work on BNC.
BNC is configurated to save rinex navigation files (GPS and GLONASS separated)on a directory with an interval of 15min. 
When I start a stream (RTCM3.1 on TLSE1 station for example), BNC produce rinex navigation files, but some of them are empty or other one contains only GPS information. But when I scan the stream, I found 1019 and 1020 RTCM messages each 30s.
Could you please explain us this behavior? does BNC take into account only one time the ephemeris of a PRN and wait a new generation of ephemeris to save it ?

Thank you for your answer.
Best regards
Gregory"	task	closed	normal	BNC		fixed