% Modified to compute the UTC time at boot up

                % Search for first recorded GPS timestamp when GPS got satellites locked in
                I = max(find(GPS_col.GWk, 1, 'first'), find(GPS_col.GMS, 1, 'first'));
                
                % Extract GPS and System time
                recv_timeUS = GPS_col.TimeUS(I);
                recv_GWk = GPS_col.GWk(I);
                recv_GMS = GPS_col.GMS(I);
                
                % Calculate the gps-time datenum
                %  Ref: http://www.oc.nps.edu/oc2902w/gps/timsys.html
                %  Ref: https://confluence.qps.nl/display/KBE/UTC+to+GPS+Time+Correction
                gps_zero_datenum = datenum('1980-01-06 00:00:00.000','yyyy-mm-dd HH:MM:SS.FFF');
                days_since_gps_zero = recv_GWk*7 + recv_GMS/1e3/60/60/24;
                recv_gps_datenum = gps_zero_datenum + days_since_gps_zero;
                % Adjust for leap seconds (disagreement between GPS and UTC)
                leap_second_table = datenum(...
                    ['Jul 01 1981'
                     'Jul 01 1982'
                     'Jul 01 1983'
                     'Jul 01 1985'
                     'Jan 01 1988'
                     'Jan 01 1990'
                     'Jan 01 1991'
                     'Jul 01 1992'
                     'Jul 01 1993'
                     'Jul 01 1994'
                     'Jan 01 1996'
                     'Jul 01 1997'
                     'Jan 01 1999'
                     'Jan 01 2006'
                     'Jan 01 2009'
                     'Jul 01 2012'
                     'Jul 01 2015'
                     'Jan 01 2017'], 'mmm dd yyyy');
                leapseconds = sum(recv_gps_datenum > leap_second_table);
                recv_utc_datenum = recv_gps_datenum - leapseconds/60/60/24;
                % Record adjusted time to the log's property
                boot_time_utc = recv_utc_datenum - recv_timeUS/1e6/60/60/24;

                % Put a human-readable version in the public properties
                boot_date = datestr(boot_time_utc, 'yyyy-mm-dd HH:MM:SS');
end```