Modified proprietary binary output data format to fix incorrect date/time calculation on some Garmin marine products.
Changes made from version 3.00 to 3.10:
Added process to monitor serial output in order to improve reliability.
Changes made from version 2.90 to 3.00:
Reduced the number of channels allocated to searching in order to avoid overloading the CPU in difficult signal environments.
Changes made from version 2.80 to 2.90:
Fixed SBAS compatibility issue with Japanese MSAS system.
Drop WAAS satellites that are not transmitting useful data.
Changes made from version 2.70 to 2.80:
Fixed potential loss of user settings in version 2.70.
Changes made from version 2.60 to 2.70:
Added ability to turn low speed velocity masking on and off via a NMEA command.
Changes made from version 2.50 to 2.60:
Added a new configurable feature called PPS Auto Off Modethat is disabled by default. Enabling this feature will turn off PPS output when the GPS fix is lost. Once a new fix is obtained PPS output will resume as normal.
Corrected the sign on integrated cycles and carrier phase data in the RCV CPO message.
Changes made from version 2.40 to 2.50:
Improved SBAS search and selection process.
Changes made from version 2.30 to 2.40:
Updated for use with Garmin marine products.
Changes made from version 2.20 to 2.30:
Validate altitude during first-fix processing.
Improved EPH during transition from non-differential fix to a differential fix.
Added ability to turn position averaging on and off via a Garmin or NMEA command.
Allow vertical filter to be disabled via the PGRMC sentence.
Enhanced first fix processing.
Changes made from version 2.10 to 2.20:
Improved non-volatile memory storage of WAAS/EGNOS ionospheric mask corrections.
Changes made from version 2.09 to 2.10:
Improved WAAS/EGNOS satellite selection algorithm to select the satellite with the most beneficial corrections given the unit's current position. Units will not use a WAAS/EGNOS satellite if the unit's current position is outside of a given WAAS/EGNOS satellite's service volume.
Changed software version to 2.10.
Changes made from version 2.08 to 2.09:
There were no functional changes made for this release. Modifications were made for manufacturing purposes only.
Changes made from version 2.07 to 2.08:
Added automatic position averaging when stopped.
Obsoleted position pinning. Position pinning remains off regardless of the PGRMC1 sentence command.
Fixed problem with saving unit position in nonvol upon first fix.
Change software version to 2.08.
Changes made from version 2.06 to 2.07:
Added support for ephemeris download.
Fixed problems where leading zeros were not being transmitted in certain fields of GPRMC and GPVTG.
Improve eph estimate for WAAS DGPS fixes.
Changed software version to 2.07.
Changes made from version 2.05 to 2.06:
Addressed problem where NMEA sentences could become intermittent and unreliable when tracking two WAAS satellites simultaneously.
Addressed problem where an 'extra' PPS pulse sometimes occurred in marginal signal environments.
More work on problem where the unit sometimes reported an incorrect date and time in marginal signal environments when PPS is enabled.
Changed software version to 2.06.
Changes made from version 2.04 to 2.05:
Fix problem where unit sometimes reported an incorrect date and time in marginal signal environments when PPS is enabled.
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