, 146 GLONASS navigation satellites have been launched, of which 134 reached the correct orbit and 24 are currently operational.
GC number (Ground Control number, Russian: ÃÂøÃÂÃÂõüýÃÂù ýþüõÃÂ, ýþüõàÿþ ýð÷õüýþüàúþüÿûõúÃÂàÃÂÿÃÂðòûõýøÃÂ) is the spacecraft number in almanac. It only has to be unique during life time of each satellite. Numbers are subject to reuse. Some catalogs mistakenly used GC numbers for historical identification. See notes next to GC numbers.
GC numbers refer to currently active satellites. GC numbers in parentheses refer to non-operational satellites under testing or in reserve.<br />Refer to Official GLONASS web page for the most up-to-date information.