I have NMEA sentences including GPGGA , GPGSV, GLGSV, QZGSV,QZGSA, GPGSA and GNGSA. my goal is to achieve HRMS accuracy meter. produced android devices for special intent gives GP/GN GST nmea message which includes latitude and longitude error meters but android device that I have is not produced for special aim and dosent give GP/GN GST nmea message. I dont know How I am able to calcute HRMS value as meter. On the other hand, when Location is changed Android locationlibrary provide accuracy as meters. But I would like to calculate Horizontal accuracy using nmea messages. is there any way to calculate HRMS value using messages that I mentioned above of this writing.
nmea messages $GPGSA GPS DOP and active satellites eg1. $GPGSA,A,3,,,,,,16,18,,22,24,,,3.6,2.1,2.2*3C eg2. $GPGSA,A,3,19,28,14,18,27,22,31,39,,,,,1.7,1.0,1.3*35 1 = Mode: M=Manual, forced to operate in 2D or 3D A=Automatic, 3D/2D 2 = Mode: 1=Fix not available 2=2D 3=3D 3-14 = IDs of SVs used in position fix (null for unused fields) 15 = PDOP 16 = HDOP 17 = VDOP