Editing GLONASS (section)

=== Accuracy ===
According to Russian System of Differentional Correction and Monitoring's data, {{as of|2010|lc=on}}, precision of GLONASS navigation definitions (for p=0.95) for latitude and longitude were {{cvt|4.46|–|7.38|m}} with mean number of navigation space vehicles (NSV) equals 7—8 (depending on station). In comparison, the same time precision of GPS [[navigation]] definitions were {{cvt|2.00|–|8.76|m}} with mean number of NSV equals 6—11 (depending on station).

Some modern receivers are able to use both GLONASS and GPS satellites together, providing greatly improved coverage in urban canyons and giving a very fast time to fix due to over 50 satellites being available. In indoor, urban canyon or mountainous areas, accuracy can be greatly improved over using GPS alone. For using both navigation systems simultaneously, precision of GLONASS/GPS navigation definitions were {{cvt|2.37|–|4.65|m}} with mean number of NSV equals 14—19 (depends on station).

In May 2009, [[Anatoly Perminov]], then director of the [[Roscosmos]], stated that actions were undertaken to expand GLONASS's constellation and to improve the [[ground segment]] to increase the navigation definition of GLONASS to an accuracy of {{cvt|2.8|m}} by 2011.<ref name="pr_rianscience">{{cite web|url=http://www.rian.ru/science/20090512/170848130.html|title=Роскосмос обещает повысить точность работы ГЛОНАСС с 10 до 5,5 метров|date=12 May 2009|publisher=РИА Новости|access-date=2 September 2015|archive-date=29 May 2010|archive-url=https://web.archive.org/web/20100529064042/http://www.rian.ru/science/20090512/170848130.html|url-status=live}}</ref> In particular, the latest satellite design, [[GLONASS-K]] has the ability to double the system's accuracy once introduced. The system's ground segment is also to undergo improvements. As of early 2012, sixteen positioning ground stations are under construction in [[Russia]] and in the [[Antarctic]] at the [[Bellingshausen Station|Bellingshausen]] and [[Novolazarevskaya Station|Novolazarevskaya]] bases. New stations will be built around the southern hemisphere from [[Brazil]] to [[Indonesia]]. Together, these improvements are expected to bring GLONASS' accuracy to 0.6 m or better by 2020.<ref name="kramnik_feb2012">{{cite news|url=http://rbth.ru/articles/2012/02/16/glonass_benefits_worth_the_extra_expense_14862.html|title=GLONASS benefits worth the extra expense|last1=Kramnik|first1=Ilya|newspaper=Russia Beyond the Headlines|date=2012-02-16|access-date=22 February 2012|archive-date=22 February 2012|archive-url=https://web.archive.org/web/20120222100105/http://rbth.ru/articles/2012/02/16/glonass_benefits_worth_the_extra_expense_14862.html|url-status=live}}</ref> The setup of a GLONASS receiving station in the [[Philippines]] is also now under negotiation.<ref>{{cite news|title=DOST Finalizes MOU with Russian Space Agency|url=https://www.dfa.gov.ph/dfa-news/news-from-our-foreign-service-postsupdate/17790-dost-finalizes-mou-with-russian-space-agency|access-date=24 September 2018|publisher=Department of Foreign Affairs (Philippines)|date=7 September 2018|archive-date=25 September 2018|archive-url=https://web.archive.org/web/20180925104330/https://www.dfa.gov.ph/dfa-news/news-from-our-foreign-service-postsupdate/17790-dost-finalizes-mou-with-russian-space-agency|url-status=live}}</ref>