BG96, without AGPS (no network) frequently loses GPS fix. Whether GPS alone or GPS+Glosnas+Galileo, the same behaviour persists. Problem recurs between 30 min to 3-4 hrs. However sometime after reboot (of board), things continue working for a period of 10 hours. String read from usbnmea port at frequency of 1 Hz.
Below is a snippet from GPS messages seen - just before loss of fix till getting full fix. Am sharing the snippet for GPS+Glosnas+Galileo. First gets satellite and SNR in GSV and then elevation/aizmuth
[EDIT May 8th] We noticed across data of past 3-4 days that this loss happens just before the modem outputs points wiht 3D fix. Anyhow 3D fix does not seem to be working (just 2-3 points)
Is this a known issue an update of patch. Or how do I go about troubleshooting this
My current version (from ATI)
Quectel
BG96
Revision: BG96MAR04A04M1G
2024-05-06 17:30:02[GPS]$GPGGA,173003.00,2410.100189,N,08239.401210,E,1,08,0.7,287.0,M,-51.0,M,41
2024-05-06 17:30:02[GPS]$GNGNS,173003.00,2410.100189,N,08239.401210,E,AAA,16,0.7,287.0,-51.0,V41
2024-05-06 17:30:02[GPS]$GPRMC,173003.00,A,2410.100189,N,08239.401210,E,0.0,193.4,060524,0.1,E,A,V42
2024-05-06 17:30:02[GPS]$GPGSA,A,2,02,10,21,25,26,28,31,32,1.0,0.7,0.837
2024-05-06 17:30:02[GPS]$GNGSA,A,2,02,10,21,25,26,28,31,32,1.0,0.7,0.8,134
2024-05-06 17:30:02[GPS]$GNGSA,A,2,68,69,78,79,80,83,84,1.0,0.7,0.8,232
2024-05-06 17:30:02[GPS]$GNGSA,A,2,10,1.0,0.7,0.8,33D
2024-05-06 17:30:03[GPS]$GLGSV,3,1,09,78,42,046,44,80,16,188,53,79,61,144,51,69,30,337,50,172
2024-05-06 17:30:03[GPS]$GLGSV,3,2,09,84,23,279,37,83,14,215,36,68,40,042,46,85,00,327,17D
2024-05-06 17:30:03[GPS]$GLGSV,3,3,09,67,13,090,14B
2024-05-06 17:30:03[GPS]$GPGSV,6,1,21,01,45,02,28,284,43,03,08,319,41,10,40,123,53,157
2024-05-06 17:30:03[GPS]$GPGSV,6,2,21,16,06,184,48,21,34,265,48,25,14,050,38,26,35,160,45,162
2024-05-06 17:30:03[GPS]$GPGSV,6,3,21,28,62,019,46,31,75,261,50,32,35,049,44,04,00,275,168
2024-05-06 17:30:03[GPS]$GPGSV,6,4,21,23,06,133,38,35,40,42,41,48,155
2024-05-06 17:30:03[GPS]$GPGSV,6,5,21,42,35,45,48,46,35,48,34,166
2024-05-06 17:30:03[GPS]$GPGSV,6,6,21,51,34,164
2024-05-06 17:30:03[GPS]$GAGSV,3,1,09,10,45,246,52,11,37,284,44,12,39,210,47,19,32,050,38,77B
2024-05-06 17:30:03[GPS]$GAGSV,3,2,09,21,25,064,44,31,16,178,47,04,46,329,09,13,284,77E
2024-05-06 17:30:03[GPS]$GAGSV,3,3,09,36,04,322,748
2024-05-06 17:30:03[GPS]$GPGGA,173004.00,2410.100202,N,08239.401212,E,1,08,0.6,287.0,M,-51.0,M,45
2024-05-06 17:30:03[GPS]$GNGNS,173004.00,2410.100202,N,08239.401212,E,AAA,18,0.6,287.0,-51.0,V4B
2024-05-06 17:30:03[GPS]$GPRMC,173004.00,A,2410.100202,N,08239.401212,E,0.0,193.4,060524,0.1,E,A,V47
2024-05-06 17:30:03[GPS]$GPGSA,A,2,02,10,21,25,26,28,31,32,1.0,0.6,0.836
2024-05-06 17:30:03[GPS]$GNGSA,A,2,02,10,21,25,26,28,31,32,1.0,0.6,0.8,135
2024-05-06 17:30:03[GPS]$GNGSA,A,2,68,69,78,79,80,83,84,1.0,0.6,0.8,233
2024-05-06 17:30:03[GPS]$GNGSA,A,2,10,21,31,1.0,0.6,0.8,33D
2024-05-06 17:30:04[GPS]$GNGNS,NNN,V67
2024-05-06 17:30:04[GPS]$GPGSA,A,1,32
2024-05-06 17:30:04[GPS]$GNGSA,A,1,2C
2024-05-06 17:30:04[GPS]$GPGGA,0,66
2024-05-06 17:30:04[GPS]$GPRMC,V,N,V29
2024-05-06 17:30:05[GPS]$GLGSV,1,1,01,42,17F
2024-05-06 17:30:05[GPS]$GPGSV,1,1,01,16,46,160
2024-05-06 17:30:05[GPS]$GNGNS,NNN,V67
2024-05-06 17:30:05[GPS]$GPGSA,A,1,32
2024-05-06 17:30:05[GPS]$GNGSA,A,1,2C
2024-05-06 17:30:05[GPS]$GPGGA,0,66
2024-05-06 17:30:05[GPS]$GPRMC,V,N,V29
2024-05-06 17:30:06[GPS]$GLGSV,1,1,01,46,17B
2024-05-06 17:30:06[GPS]$GPGSV,2,1,05,02,40,03,40,16,47,26,42,165
2024-05-06 17:30:06[GPS]$GPGSV,2,2,05,31,48,16F
2024-05-06 17:30:06[GPS]$GNGNS,NNN,V67
2024-05-06 17:30:06[GPS]$GPGSA,A,1,32
2024-05-06 17:30:06[GPS]$GNGSA,A,1,2C
2024-05-06 17:30:06[GPS]$GPGGA,0,66
2024-05-06 17:30:06[GPS]$GPRMC,V,N,V29
2024-05-06 17:30:07[GPS]$GLGSV,1,1,01,46,17B
2024-05-06 17:30:07[GPS]$GPGSV,3,1,09,02,43,03,40,10,49,16,47,165
2024-05-06 17:30:07[GPS]$GPGSV,3,2,09,21,44,26,43,28,44,31,51,160
2024-05-06 17:30:07[GPS]$GPGSV,3,3,09,32,42,16A
2024-05-06 17:30:07[GPS]$GNGNS,NNN,V67
2024-05-06 17:30:07[GPS]$GPGSA,A,1,32
2024-05-06 17:30:07[GPS]$GNGSA,A,1,2C
2024-05-06 17:30:07[GPS]$GPGGA,0,66
2024-05-06 17:30:07[GPS]$GPRMC,V,N,V29
2024-05-06 17:30:08[GPS]$GLGSV,1,1,03,48,49,47,179
2024-05-06 17:30:08[GPS]$GPGSV,3,1,10,02,44,03,41,10,52,16,47,161
2024-05-06 17:30:08[GPS]$GPGSV,3,2,10,21,48,25,38,26,44,28,47,16A
2024-05-06 17:30:08[GPS]$GPGSV,3,3,10,31,51,32,45,163
2024-05-06 17:30:08[GPS]$GNGNS,NNN,V67
2024-05-06 17:30:08[GPS]$GPGSA,A,1,32
2024-05-06 17:30:08[GPS]$GNGSA,A,1,2C
2024-05-06 17:30:08[GPS]$GPGGA,0,66
2024-05-06 17:30:08[GPS]$GPRMC,V,N,V29
2024-05-06 17:30:09[GPS]$GLGSV,2,1,05,47,52,50,45,17E
2024-05-06 17:30:09[GPS]$GLGSV,2,2,05,35,17B
2024-05-06 17:30:09[GPS]$GPGSV,3,1,10,02,43,03,40,10,51,16,47,164
2024-05-06 17:30:09[GPS]$GPGSV,3,2,10,21,47,25,38,26,45,28,46,165
2024-05-06 17:30:09[GPS]$GPGSV,3,3,10,31,50,32,44,163
2024-05-06 17:30:09[GPS]$GNGNS,NNN,V67
2024-05-06 17:30:09[GPS]$GPGSA,A,1,32
2024-05-06 17:30:09[GPS]$GNGSA,A,1,2C
2024-05-06 17:30:09[GPS]$GPGGA,0,66
2024-05-06 17:30:09[GPS]$GPRMC,V,N,V29
2024-05-06 17:30:10[GPS]$GLGSV,2,1,05,47,52,49,50,172
2024-05-06 17:30:10[GPS]$GLGSV,2,2,05,38,176
2024-05-06 17:30:10[GPS]$GPGSV,3,1,11,01,44,02,43,03,40,10,50,161
2024-05-06 17:30:10[GPS]$GPGSV,3,2,11,16,46,21,47,25,39,26,44,169
2024-05-06 17:30:10[GPS]$GPGSV,3,3,11,28,46,31,50,32,44,16A
2024-05-06 17:30:10[GPS]$GNGNS,NNN,V67
2024-05-06 17:30:10[GPS]$GPGSA,A,1,32
2024-05-06 17:30:10[GPS]$GNGSA,A,1,2C
2024-05-06 17:30:10[GPS]$GPGGA,0,66
2024-05-06 17:30:10[GPS]$GPRMC,V,N,V29
2024-05-06 17:30:11[GPS]$GLGSV,2,1,06,47,52,49,50,171
2024-05-06 17:30:11[GPS]$GLGSV,2,2,06,38,43,172
2024-05-06 17:30:11[GPS]$GPGSV,3,1,11,01,46,02,43,03,41,10,52,160
2024-05-06 17:30:11[GPS]$GPGSV,3,2,11,16,47,21,47,25,39,26,45,169
2024-05-06 17:30:11[GPS]$GPGSV,3,3,11,28,46,31,50,32,44,16A
2024-05-06 17:30:11[GPS]$GNGNS,NNN,V67
2024-05-06 17:30:11[GPS]$GPGSA,A,1,32
2024-05-06 17:30:11[GPS]$GNGSA,A,1,2C
2024-05-06 17:30:11[GPS]$GPGGA,0,66
2024-05-06 17:30:11[GPS]$GPRMC,V,N,V29
2024-05-06 17:30:12[GPS]$GLGSV,2,1,06,46,52,49,50,170
2024-05-06 17:30:12[GPS]$GLGSV,2,2,06,38,47,176
2024-05-06 17:30:12[GPS]$GPGSV,4,1,14,01,47,02,43,03,40,10,52,162
2024-05-06 17:30:12[GPS]$GPGSV,4,2,14,16,47,21,47,25,39,26,45,16B
2024-05-06 17:30:12[GPS]$GPGSV,4,3,14,28,46,31,50,32,44,40,42,16A
2024-05-06 17:30:12[GPS]$GPGSV,4,4,14,41,47,45,47,165
2024-05-06 17:30:12[GPS]$GNGNS,NNN,V67
2024-05-06 17:30:12[GPS]$GPGSA,A,1,32
2024-05-06 17:30:12[GPS]$GNGSA,A,1,2C
2024-05-06 17:30:12[GPS]$GPGGA,0,66
2024-05-06 17:30:12[GPS]$GPRMC,V,N,V29
2024-05-06 17:30:13[GPS]$GLGSV,2,1,06,45,52,48,51,173
2024-05-06 17:30:13[GPS]$GLGSV,2,2,06,38,47,176
2024-05-06 17:30:13[GPS]$GPGSV,4,1,16,01,47,02,43,03,41,10,52,161
2024-05-06 17:30:13[GPS]$GPGSV,4,2,16,16,47,21,47,25,39,26,45,169
2024-05-06 17:30:13[GPS]$GPGSV,4,3,16,28,46,31,50,32,43,38,34,161
2024-05-06 17:30:13[GPS]$GPGSV,4,4,16,40,41,41,47,45,48,50,46,16E
2024-05-06 17:30:13[GPS]$GNGNS,NNN,V67
2024-05-06 17:30:13[GPS]$GPGSA,A,1,32
2024-05-06 17:30:13[GPS]$GNGSA,A,1,2C
2024-05-06 17:30:13[GPS]$GPGGA,0,66
2024-05-06 17:30:13[GPS]$GPRMC,V,N,V29
2024-05-06 17:30:14[GPS]$GLGSV,2,1,06,44,52,47,51,17D
2024-05-06 17:30:14[GPS]$GLGSV,2,2,06,38,47,176
2024-05-06 17:30:14[GPS]$GPGSV,4,1,16,01,47,02,43,03,40,10,52,160
2024-05-06 17:30:14[GPS]$GPGSV,4,2,16,16,47,21,47,25,39,26,46,16A
2024-05-06 17:30:14[GPS]$GPGSV,4,3,16,28,45,31,50,32,43,38,34,162
2024-05-06 17:30:14[GPS]$GPGSV,4,4,16,40,42,41,47,45,47,50,47,163
2024-05-06 17:30:14[GPS]$GNGNS,NNN,V67
2024-05-06 17:30:14[GPS]$GPGSA,A,1,32
2024-05-06 17:30:14[GPS]$GNGSA,A,1,2C
2024-05-06 17:30:14[GPS]$GPGGA,0,66
2024-05-06 17:30:14[GPS]$GPRMC,V,N,V29
2024-05-06 17:30:15[GPS]$GLGSV,2,1,06,44,52,48,51,172
2024-05-06 17:30:15[GPS]$GLGSV,2,2,06,39,46,176
2024-05-06 17:30:15[GPS]$GPGSV,4,1,16,01,48,02,43,03,40,10,51,16C
2024-05-06 17:30:15[GPS]$GPGSV,4,2,16,16,47,21,47,25,39,26,46,16A
2024-05-06 17:30:15[GPS]$GPGSV,4,3,16,28,45,31,49,32,44,38,34,16D
2024-05-06 17:30:15[GPS]$GPGSV,4,4,16,40,41,41,47,45,48,50,47,16F
2024-05-06 17:30:15[GPS]$GNGNS,NNN,V67
2024-05-06 17:30:15[GPS]$GPGSA,A,1,32
2024-05-06 17:30:15[GPS]$GNGSA,A,1,2C
2024-05-06 17:30:15[GPS]$GPGGA,0,66
2024-05-06 17:30:15[GPS]$GPRMC,V,N,V29
2024-05-06 17:30:16[GPS]$GLGSV,2,1,06,44,52,49,51,173
2024-05-06 17:30:16[GPS]$GLGSV,2,2,06,39,46,176
2024-05-06 17:30:16[GPS]$GPGSV,5,1,17,01,48,02,43,03,40,10,52,16F
2024-05-06 17:30:16[GPS]$GPGSV,5,2,17,16,47,21,47,25,39,26,47,16B
2024-05-06 17:30:16[GPS]$GPGSV,5,3,17,28,45,31,50,32,45,38,34,164
2024-05-06 17:30:16[GPS]$GPGSV,5,4,17,40,41,41,47,45,47,50,47,160
2024-05-06 17:30:16[GPS]$GPGSV,5,5,17,51,35,160
2024-05-06 17:30:16[GPS]$GNGNS,NNN,V67
2024-05-06 17:30:16[GPS]$GPGSA,A,1,32
2024-05-06 17:30:16[GPS]$GNGSA,A,1,2C
2024-05-06 17:30:16[GPS]$GPGGA,0,66
2024-05-06 17:30:16[GPS]$GPRMC,V,N,V29
2024-05-06 17:30:17[GPS]$GLGSV,2,1,07,44,52,49,51,172
2024-05-06 17:30:17[GPS]$GLGSV,2,2,07,38,34,46,171
2024-05-06 17:30:17[GPS]$GPGSV,5,1,18,01,48,02,43,03,40,10,52,160
2024-05-06 17:30:17[GPS]$GPGSV,5,2,18,16,47,21,47,25,39,26,47,164
2024-05-06 17:30:17[GPS]$GPGSV,5,3,18,28,45,31,50,32,45,38,34,16B
2024-05-06 17:30:17[GPS]$GPGSV,5,4,18,40,41,41,47,45,47,46,34,16C
2024-05-06 17:30:17[GPS]$GPGSV,5,5,18,50,47,51,35,169
2024-05-06 17:30:17[GPS]$GNGNS,NNN,V67
2024-05-06 17:30:17[GPS]$GPGSA,A,1,32
2024-05-06 17:30:17[GPS]$GNGSA,A,1,2C
2024-05-06 17:30:17[GPS]$GPGGA,0,66
2024-05-06 17:30:17[GPS]$GPRMC,V,N,V29
2024-05-06 17:30:18[GPS]$GLGSV,2,1,07,44,52,50,51,17A
2024-05-06 17:30:18[GPS]$GLGSV,2,2,07,39,36,46,172
2024-05-06 17:30:18[GPS]$GPGSV,5,1,18,01,48,02,43,03,40,10,52,160
2024-05-06 17:30:18[GPS]$GPGSV,5,2,18,16,48,21,47,25,39,26,48,164
2024-05-06 17:30:18[GPS]$GPGSV,5,3,18,28,45,31,50,32,46,38,34,168
2024-05-06 17:30:18[GPS]$GPGSV,5,4,18,40,42,41,47,45,47,46,34,16F
2024-05-06 17:30:18[GPS]$GPGSV,5,5,18,50,47,51,35,169
2024-05-06 17:30:18[GPS]$GNGNS,NNN,V67
2024-05-06 17:30:18[GPS]$GPGSA,A,1,32
2024-05-06 17:30:18[GPS]$GNGSA,A,1,2C
2024-05-06 17:30:18[GPS]$GPGGA,0,66
2024-05-06 17:30:18[GPS]$GPRMC,V,N,V29
2024-05-06 17:30:19[GPS]$GLGSV,2,1,07,44,51,50,51,179
2024-05-06 17:30:19[GPS]$GLGSV,2,2,07,38,35,45,173
2024-05-06 17:30:19[GPS]$GPGSV,5,1,18,01,48,02,43,03,40,10,52,160
2024-05-06 17:30:19[GPS]$GPGSV,5,2,18,16,47,21,47,25,39,26,48,16B
2024-05-06 17:30:19[GPS]$GPGSV,5,3,18,28,44,31,50,32,46,38,34,169
2024-05-06 17:30:19[GPS]$GPGSV,5,4,18,40,42,41,47,45,47,46,34,16F
2024-05-06 17:30:19[GPS]$GPGSV,5,5,18,50,47,51,35,169
2024-05-06 17:30:19[GPS]$GAGSV,1,1,01,12,46,773
2024-05-06 17:30:19[GPS]$GNGNS,NNN,V67
2024-05-06 17:30:19[GPS]$GPGSA,A,1,32
2024-05-06 17:30:19[GPS]$GNGSA,A,1,2C
2024-05-06 17:30:19[GPS]$GPGGA,0,66
2024-05-06 17:30:19[GPS]$GPRMC,V,N,V29
2024-05-06 17:30:19[GPS]$GLGSV,2,1,07,44,52,51,51,17B
2024-05-06 17:30:19[GPS]$GLGSV,2,2,07,39,35,45,172
2024-05-06 17:30:19[GPS]$GPGSV,5,1,18,01,49,02,43,03,41,10,53,161
2024-05-06 17:30:19[GPS]$GPGSV,5,2,18,16,47,21,47,25,39,26,48,16B
2024-05-06 17:30:19[GPS]$GPGSV,5,3,18,28,45,31,50,32,46,38,34,168
2024-05-06 17:30:19[GPS]$GPGSV,5,4,18,40,41,41,46,45,47,46,34,16D
2024-05-06 17:30:19[GPS]$GPGSV,5,5,18,50,46,51,35,168
2024-05-06 17:30:19[GPS]$GAGSV,1,1,01,12,47,772
2024-05-06 17:30:19[GPS]$GNGNS,173019.60,NNN,V42
2024-05-06 17:30:19[GPS]$GPGSA,A,1,32
2024-05-06 17:30:19[GPS]$GNGSA,A,1,2C
2024-05-06 17:30:19[GPS]$GPGGA,0,66
2024-05-06 17:30:19[GPS]$GPRMC,V,N,V29
2024-05-06 17:30:20[GPS]$GPGGA,173020.95,2410.102948,N,08239.394843,E,1,08,1.0,299.1,M,-51.0,M,44
2024-05-06 17:30:20[GPS]$GNGNS,173020.95,2410.102948,N,08239.394843,E,ANN,08,1.0,299.1,-51.0,V4B
2024-05-06 17:30:20[GPS]$GPRMC,173020.95,A,2410.102948,N,08239.394843,E,0.0,060524,0.1,E,A,V6E
2024-05-06 17:30:20[GPS]$GPGSA,A,3,02,10,21,25,26,28,31,32,2.0,1.0,1.832
2024-05-06 17:30:20[GPS]$GNGSA,A,3,02,10,21,25,26,28,31,32,2.0,1.0,1.8,131
2024-05-06 17:30:20[GPS]$GNGSA,A,3,2.0,1.0,1.8,238
2024-05-06 17:30:20[GPS]$GAGSA,A,1,23
2024-05-06 17:30:21[GPS]$GLGSV,3,1,09,78,42,045,44,80,17,188,52,79,62,143,50,69,30,338,51,17A
2024-05-06 17:30:21[GPS]$GLGSV,3,2,09,84,23,278,39,83,14,215,36,68,40,043,43,85,01,327,177
2024-05-06 17:30:21[GPS]$GLGSV,3,3,09,67,13,091,14A
2024-05-06 17:30:21[GPS]$GPGSV,5,1,20,01,48,02,28,284,43,03,09,320,40,10,40,123,52,153
2024-05-06 17:30:21[GPS]$GPGSV,5,2,20,16,07,184,47,21,34,265,47,25,14,050,39,26,35,160,47,162
2024-05-06 17:30:21[GPS]$GPGSV,5,3,20,28,61,019,45,31,75,264,49,32,34,049,46,04,00,277,166
2024-05-06 17:30:21[GPS]$GPGSV,5,4,20,23,06,133,38,34,40,42,41,47,159
2024-05-06 17:30:21[GPS]$GPGSV,5,5,20,45,47,46,34,50,47,51,35,165
2024-05-06 17:30:21[GPS]$GAGSV,3,1,10,12,39,210,47,04,46,329,09,13,285,10,45,246,773
2024-05-06 17:30:21[GPS]$GAGSV,3,2,10,11,37,282,19,32,052,21,25,063,31,16,178,77B
2024-05-06 17:30:21[GPS]$GAGSV,3,3,10,33,03,167,36,04,322,773