{"id":61118,"date":"2023-11-09T08:38:49","date_gmt":"2023-11-09T13:38:49","guid":{"rendered":"https:\/\/oceaneering.louderstaging.com\/positioning-solutions\/c-nav-faq\/"},"modified":"2024-01-03T15:44:03","modified_gmt":"2024-01-03T20:44:03","slug":"c-nav-faq","status":"publish","type":"page","link":"https:\/\/ef064672be.nxcli.io\/pt\/positioning-solutions\/c-nav-faq\/","title":{"rendered":"C-Nav FAQ"},"content":{"rendered":"

\n\t\tC-Nav FAQ\n\t<\/h1>\n

\n\t\tC-Nav Corrections Services\n\t<\/h2>\n\t\t\t\t\t\t

Can you tell me more about the legacy C-Nav Corrections service going End Of Life?<\/h5>\n\t\t\t

Following the email announcement in 2021 regarding the legacy corrections service retiring end of life October 2025 (replaced by the C-Nav LEO service with associated C-NavX1 GNSS receiver).<\/p>\n

A copy of the bulletin for the End of Life announcement can be found here<\/a><\/p>\n\t\t\t\t\t\t

Can you tell me more about the new agreement with DDK Positioning?<\/h5>\n\t\t\t

A copy of the FAQ document relating to the agreement with DDK can be found here<\/a><\/p>\n\t\t\t\t\t\t

What is C-Nav Correction Service? <\/h5>\n\t\t\t

The C-Nav Correction Service\u00a0includes GLONASS and a GPS (GNSS) clock, as well as orbit correctors. It provides a fully independent suite of clock and orbit correction algorithms, and fully independent servers in geographically separated processing centers. Features also include a second independent global network of C-Nav dual frequency GPS\/GLONASS reference stations equipped with Sapphire based technology, and simultaneously broadcasts from two independent satellite networks (Net-1 and Net-2).<\/p>\n\t\t\t\t\t\t

To what datum is C-NavC2 SF2 and SF3 corrections referenced?<\/h5>\n\t\t\t

C-NavC2 SF2 and SF3 use the latest realization of the International Terrestrial Reference Frame (ITRF). In other words, the C-Nav corrections are based upon ITRF20, and are adjusted on a daily basis (at UTC midnight) to account for minute shifts in velocity attributed to continental shifts on a global basis.<\/p>\n\t\t\t\t\t\t

Will I be notified when a C-Nav Correction License is nearing expiration?<\/h5>\n\t\t\t
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\r\n<\/div>\r\n\t\t\t\t\t\t
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The C-Nav AuthCode System will automatically notify the original recipients of an AuthCode (C-Nav Correction License) that a license is nearing expiration. All email addresses associated with the original AuthCode, including all carbon copied (CC) recipients, will be notified. \u00a0<\/span>
<\/span>
<\/span>The following tables outline the interval at which a notification email is sent.<\/span><\/p>\n<\/div>\n\t<\/div>\n<\/div>\n<\/div>\n<\/div>\n\t<\/div>\n\n

\n\t\t\t
\n\t
\n\t
\n\t\t
\n\n\n\n\t\t\t\n\t\t\n\t\t\t\n\t\t
\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\tFirst Notification<\/span>\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/th>\t\t<\/tr>\n\t<\/thead>\n\t\t
<\/td><\/tr>\t<\/tbody>\n<\/table>\n<\/div>\n\t<\/div>\n<\/div>\n
\n\t
\n\t\t
\n\n\n\n\t\t\t\n\t\t\n\t\t\t\n\t\t
\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t>=days<\/span>\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/th>\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\tNotify at days<\/span>\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/th>\t\t<\/tr>\n\t<\/thead>\n\t\t
180<\/td>30<\/td><\/tr>
90<\/td>14<\/td><\/tr>
30<\/td>7<\/td><\/tr>
3<\/td>1<\/td><\/tr>\t<\/tbody>\n<\/table>\n<\/div>\n\t<\/div>\n<\/div>\n
\n\t
\n\t\t
\n\n\n\n\t\t\t\n\t\t\n\t\t\t\n\t\t
\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\tSecond Notification<\/span>\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/th>\t\t<\/tr>\n\t<\/thead>\n\t\t
<\/td><\/tr>\t<\/tbody>\n<\/table>\n<\/div>\n\t<\/div>\n<\/div>\n
\n\t
\n\t\t
\n\n\n\n\t\t\t\n\t\t\n\t\t\t\n\t\t
\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t>=days<\/span>\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/th>\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\tNotify at days<\/span>\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/th>\t\t<\/tr>\n\t<\/thead>\n\t\t
180<\/td>14<\/td><\/tr>
90<\/td>7<\/td><\/tr>\t<\/tbody>\n<\/table>\n<\/div>\n\t<\/div>\n<\/div>\n<\/div>\n<\/div>\n\t<\/div>\n\n
\n\t\t\t
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Examples:<\/span><\/p>\n