What does the line in the RINEX observation file mean?

Question

satellite navigation

Hello, please tell me, I'm trying to parse the Rinex obs file (Observation data file).
Format description here (23 pages):
meteolab.ru/doc/rinex211rus.pdf
The file looks like this (after END OF HEADER):

05 3 24 13 10 36.0000000 0 4G12G09G06E11 -.123456789
     23629347.915 .300 8 -.353 23629364.158
     20891534.648 -.120 9 -.358 20891541.292
     20607600.189 -.430 9 .394 20607605.848
     .324 8 .178 7
     05 3 24 13 10 50.0000000 4 4

05 - As I understand it, corresponds to the year,
3 - to the month,
24 - to the day,
13 - to the hour,
10 - to the minute,
36.0000000 - to the second,
0 - to the epoch flag ...
Everything that follows, and more specifically 4G12G09G06E11, I still did not understand what it means , Could you tell?

Answer 1

4 satellites: GPS# 12 GPS# 09 GPS# 06 Gallileo# 11
Well, this, https://github.com/goGPS-Project/goGPS_Java/blob/m...