The GPS outputs NMEA0183 Code
The whole earth is divided into two fourteenth time zones, with each time zone having its own local time. In international radio communications, for the sake of uniformity, use a unified Time, called Universal Time Coordinated. The UTC, like Greenwich Mean Time on average, is the same as in London, England.
GPS is NMEA0183 code output, the GPGGA and GPRMC are clearly defined, such as: $GPGGA, 100639.00, 3109.79801, N, 12123.38493 E, 1,07,1.20, 21.9 M, 8.0 M, and 100639.00 * 5 d said the UTC time at 10 6 minutes and 39 seconds, if you count into Beijing time, add 8 hours, 18 points is 6 minutes and 39 seconds. A, $GPRMC, 100640.00, 3109.79805, N, 12123.38495 E, 0.008, 091106,,, A * 7 c 091106 said on November 9, 6 years, is also A UTC time, if the date is Beijing time, want to consider together with time.
The time of the GPS system is different from UTC time, which is a leap second, because the UTC time is adjustable, and the GPS time is continuous, the leap second is reflected in the navigation message in the next line. Beijing time = GPS time + 8 hours - leap seconds. GPGGA, GPRMC in itself has been convert GPS time to UTC time, so the time to Beijing just 8 hours, the GPS time is shown as on February 28, 0 (if not a leap year this year), Beijing is 28 February 8; The GPS time will be 15 on February 27 and Beijing time will be 23 hours on February 27. When GPS time is 18 February, Beijing time is February 28. The GPS time is 18 on February 28, while Beijing time is March 1, 2.
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