I'm looking into the raw data of my 805, and after playing a while with it, I stumble on two things.
- the dates in the log are sometimes starting at 1980 but come to current date after a while
- the sensitivity of the accelerometer appears to be "cheap"
First thing probably is due to an empty battery after long rest (weeks)? If one checks the excerpt from a recent log, this is starting in a garage, no GPS reception at the beginning. But still without a lock the date changes first from 060180 to 090180, only some seconds later to the correct date 140916. I would assume this is aligning with GPS date information from first satellites received? Only issue is that this makes alignment of GPS data with video footage a bit complicated. The video file has correct timestamps for create and modified date, interestingly enough (video file create date is 140916,074140, a timestamp that is never seen in the logs).
Second thing is the G-Force sensor readings. Though the car is in total stand still, the readings are not quite aligned to zero or gravity, are they? Also the values appear to shift a bit. What I see later when driving is the readings are not very solid, values are kind of swinging significantly between left and right when driving on a straight line. Seems to me the accelerometer is really just good for crash detection (huge spike detection) but not for general purpose readout?
Any experience to share would gladly be appreciated.
Log from first seconds of startup from inside a garage
V,050180,235949.003,,,,,0.00,-04.29,-34.30,-03.68;
V,050180,235950.003,,,,,0.00,-03.68,-34.30,-03.06;
V,050180,235951.003,,,,,0.00,-04.29,-34.30,-03.06;
V,050180,235952.003,,,,,0.00,-04.29,-34.30,-03.06;
V,050180,235953.003,,,,,0.00,-04.29,-34.30,-03.68;
V,050180,235954.003,,,,,0.00,-04.29,-34.30,-04.29;
V,050180,235955.003,,,,,0.00,-04.29,-34.30,-03.68;
V,050180,235956.003,,,,,0.00,-04.29,-34.30,-03.06;
V,050180,235957.003,,,,,0.00,-04.29,-34.30,-03.68;
V,050180,235958.003,,,,,0.00,-04.29,-34.30,-03.68;
V,050180,235959.003,,,,,0.00,-06.74,-34.91,-03.68;
V,060180,000000.003,,,,,0.00,-03.68,-34.30,-03.68;
V,060180,000001.003,,,,,0.00,-04.90,-33.69,-03.68;
V,060180,000002.003,,,,,0.00,-04.90,-34.30,-03.06;
V,060180,000003.003,,,,,0.00,-03.06,-33.08,-04.29;
V,060180,000004.003,,,,,0.00,-06.12,-33.69,-04.29;
V,060180,000005.003,,,,,0.00,-04.29,-34.30,-03.68;
V,060180,000006.003,,,,,0.00,-04.90,-34.30,-04.29;
V,060180,000007.003,,,,,0.00,-02.45,-34.91,-03.68;
V,060180,000008.003,,,,,0.00,-03.06,-33.69,-05.51;
V,060180,000009.003,,,,,0.00,-01.23,-36.14,-04.90;
V,060180,000010.003,,,,,0.00,-03.68,-33.69,-02.45;
V,060180,000011.003,,,,,0.00,-04.29,-33.69,-01.84;
V,060180,000012.003,,,,,0.00,-04.90,-35.53,-04.29;
V,060180,000013.003,,,,,0.00,-03.68,-33.08,-05.51;
V,060180,000014.003,,,,,0.00,-03.68,-34.30,-03.06;
V,060180,000015.003,,,,,0.00,-03.68,-33.69,-04.29;
V,060180,000016.003,,,,,0.00,-06.12,-34.30,-04.29;
V,060180,000017.003,,,,,0.00,-06.12,-34.30,-01.84;
V,060180,000018.003,,,,,0.00,-04.29,-39.20,-06.12;
V,060180,000019.003,,,,,0.00,+00.00,-33.08,-01.84;
V,060180,000020.003,,,,,0.00,-04.29,-33.08,-06.12;
V,060180,000021.003,,,,,0.00,-04.90,-30.63,-09.80;
V,060180,000022.003,,,,,0.00,-06.12,-34.30,-00.61;
V,060180,000023.003,,,,,0.00,-04.29,-36.14,-05.51;
V,060180,000024.003,,,,,0.00,-04.90,-34.91,-04.90;
V,060180,000025.003,,,,,0.00,-03.06,-34.30,-06.12;
V,060180,000026.003,,,,,0.00,-02.45,-34.30,-06.12;
V,060180,000027.003,,,,,0.00,-03.06,-34.91,-03.68;
V,060180,000028.003,,,,,0.00,-03.06,-34.91,-03.68;
V,060180,000029.003,,,,,0.00,-06.74,-36.14,-04.90;
V,060180,000030.003,,,,,0.00,-04.90,-35.53,-03.68;
V,060180,000031.003,,,,,0.00,-04.29,-34.30,-03.68;
V,060180,000032.003,,,,,0.00,-05.51,-36.75,-04.29;
V,060180,000033.003,,,,,0.00,-06.74,-34.30,-03.06;
V,060180,000034.003,,,,,0.00,-06.74,-35.53,-03.06;
V,060180,000035.003,,,,,0.00,-06.74,-34.91,-05.51;
V,060180,000036.003,,,,,0.00,-06.74,-33.08,-05.51;
V,060180,000037.003,,,,,0.00,-06.12,-35.53,-05.51;
V,060180,000038.003,,,,,0.00,-04.29,-34.91,-06.12;
V,060180,000039.003,,,,,0.00,-04.29,-34.91,-06.74;
V,060180,000040.003,,,,,0.00,-03.06,-35.53,-06.12;
V,060180,000041.003,,,,,0.00,+01.23,-34.91,-06.12;
V,060180,000042.003,,,,,0.00,-01.23,-34.91,-04.29;
V,060180,000043.003,,,,,0.00,-05.51,-34.91,-04.90;
V,060180,000044.003,,,,,0.00,+03.68,-33.69,-03.06;
V,060180,000045.003,,,,,0.00,-00.61,-35.53,-03.06;
V,060180,000046.003,,,,,0.00,-03.06,-34.91,-01.23;
V,060180,000047.003,,,,,0.00,-04.29,-33.08,+00.00;
V,060180,000048.003,,,,,0.00,-11.03,-35.53,-01.84;
V,060180,000049.003,,,,,0.00,-16.54,-39.20,-01.84;
V,060180,000050.003,,,,,0.00,+01.84,-34.30,-04.29;
V,060180,000051.003,,,,,0.00,-03.68,-35.53,-06.74;
V,060180,000052.003,,,,,0.00,-02.45,-34.91,-07.35;
V,060180,000053.003,,,,,0.00,+00.00,-36.75,-12.25;
V,060180,000054.003,,,,,0.00,+00.00,-34.30,-02.45;
V,060180,000055.003,,,,,0.00,+01.84,-33.08,+07.35;
V,060180,000056.003,,,,,0.00,-01.84,-37.36,+03.68;
V,060180,000057.003,,,,,0.00,-05.51,-33.69,+01.84;
V,060180,000058.003,,,,,0.00,-07.96,-34.30,+00.00;
V,060180,000059.003,,,,,0.00,-00.61,-36.14,-04.90;
V,060180,000100.218,,,,,0.00,+01.23,-34.91,-04.29;
V,060180,000101.218,,,,,0.00,+03.68,-36.14,+00.00;
V,060180,000102.218,,,,,0.00,+05.51,-34.91,-01.84;
V,060180,000103.218,,,,,0.00,+04.90,-33.08,-01.23;
V,060180,000104.218,,,,,0.00,-07.35,-33.08,+07.35;
V,060180,000105.218,,,,,0.00,-03.68,-34.91,+00.00;
V,060180,000106.218,,,,,0.00,-05.51,-35.53,-06.74;
V,060180,000107.218,,,,,0.00,-06.12,-33.69,-01.84;
V,090180,074216.092,,,,,0.00,+01.23,-36.75,+01.84;
V,090180,074217.092,,,,,0.00,-07.96,-35.53,-02.45;
V,090180,074218.092,,,,,0.00,-03.68,-34.91,-03.06;
V,090180,074219.092,,,,,0.00,-09.19,-32.46,-05.51;
V,090180,074220.092,,,,,0.00,-11.64,-34.91,-04.90;
V,090180,074221.092,,,,,0.00,-14.70,-37.98,-02.45;
V,090180,074222.092,,,,,0.00,-03.68,-36.75,-03.68;
V,090180,074223.092,,,,,0.00,-03.06,-34.91,-03.68;
V,090180,074224.092,,,,,0.00,-09.80,-33.69,-03.06;
V,090180,074225.092,,,,,0.00,-06.12,-33.69,-04.29;
V,090180,074226.092,,,,,0.00,-09.19,-37.36,-04.29;
V,090180,074227.092,,,,,0.00,+01.23,-32.46,-03.06;
V,090180,074228.092,,,,,0.00,-01.23,-34.30,-02.45;
V,090180,074229.092,,,,,0.00,-07.96,-34.91,-04.29;
V,090180,074230.092,,,,,0.00,-06.12,-36.75,-04.29;
V,090180,074231.092,,,,,0.00,-04.29,-36.14,-03.68;
V,140916,074232.092,,,,,0.00,-02.45,-36.75,-03.06;
V,140916,074233.092,,,,,0.00,-02.45,-35.53,-01.84;
V,140916,074234.092,,,,,0.00,-07.96,-35.53,-03.06;
V,140916,074235.092,,,,,0.00,-05.51,-36.14,-02.45;
V,140916,074236.092,,,,,0.00,-03.68,-36.14,-04.29;
V,140916,074237.092,,,,,0.00,-00.61,-34.91,-03.68;
V,140916,074238.092,,,,,0.00,-01.84,-34.91,-04.90;
V,140916,074239.092,,,,,0.00,-02.45,-35.53,-03.68;
V,140916,074240.092,,,,,0.00,-08.58,-35.53,-02.45;
V,140916,074241.092,,,,,0.00,-01.84,-35.53,-02.45;
- the dates in the log are sometimes starting at 1980 but come to current date after a while
- the sensitivity of the accelerometer appears to be "cheap"
First thing probably is due to an empty battery after long rest (weeks)? If one checks the excerpt from a recent log, this is starting in a garage, no GPS reception at the beginning. But still without a lock the date changes first from 060180 to 090180, only some seconds later to the correct date 140916. I would assume this is aligning with GPS date information from first satellites received? Only issue is that this makes alignment of GPS data with video footage a bit complicated. The video file has correct timestamps for create and modified date, interestingly enough (video file create date is 140916,074140, a timestamp that is never seen in the logs).
Second thing is the G-Force sensor readings. Though the car is in total stand still, the readings are not quite aligned to zero or gravity, are they? Also the values appear to shift a bit. What I see later when driving is the readings are not very solid, values are kind of swinging significantly between left and right when driving on a straight line. Seems to me the accelerometer is really just good for crash detection (huge spike detection) but not for general purpose readout?
Any experience to share would gladly be appreciated.
Log from first seconds of startup from inside a garage
V,050180,235949.003,,,,,0.00,-04.29,-34.30,-03.68;
V,050180,235950.003,,,,,0.00,-03.68,-34.30,-03.06;
V,050180,235951.003,,,,,0.00,-04.29,-34.30,-03.06;
V,050180,235952.003,,,,,0.00,-04.29,-34.30,-03.06;
V,050180,235953.003,,,,,0.00,-04.29,-34.30,-03.68;
V,050180,235954.003,,,,,0.00,-04.29,-34.30,-04.29;
V,050180,235955.003,,,,,0.00,-04.29,-34.30,-03.68;
V,050180,235956.003,,,,,0.00,-04.29,-34.30,-03.06;
V,050180,235957.003,,,,,0.00,-04.29,-34.30,-03.68;
V,050180,235958.003,,,,,0.00,-04.29,-34.30,-03.68;
V,050180,235959.003,,,,,0.00,-06.74,-34.91,-03.68;
V,060180,000000.003,,,,,0.00,-03.68,-34.30,-03.68;
V,060180,000001.003,,,,,0.00,-04.90,-33.69,-03.68;
V,060180,000002.003,,,,,0.00,-04.90,-34.30,-03.06;
V,060180,000003.003,,,,,0.00,-03.06,-33.08,-04.29;
V,060180,000004.003,,,,,0.00,-06.12,-33.69,-04.29;
V,060180,000005.003,,,,,0.00,-04.29,-34.30,-03.68;
V,060180,000006.003,,,,,0.00,-04.90,-34.30,-04.29;
V,060180,000007.003,,,,,0.00,-02.45,-34.91,-03.68;
V,060180,000008.003,,,,,0.00,-03.06,-33.69,-05.51;
V,060180,000009.003,,,,,0.00,-01.23,-36.14,-04.90;
V,060180,000010.003,,,,,0.00,-03.68,-33.69,-02.45;
V,060180,000011.003,,,,,0.00,-04.29,-33.69,-01.84;
V,060180,000012.003,,,,,0.00,-04.90,-35.53,-04.29;
V,060180,000013.003,,,,,0.00,-03.68,-33.08,-05.51;
V,060180,000014.003,,,,,0.00,-03.68,-34.30,-03.06;
V,060180,000015.003,,,,,0.00,-03.68,-33.69,-04.29;
V,060180,000016.003,,,,,0.00,-06.12,-34.30,-04.29;
V,060180,000017.003,,,,,0.00,-06.12,-34.30,-01.84;
V,060180,000018.003,,,,,0.00,-04.29,-39.20,-06.12;
V,060180,000019.003,,,,,0.00,+00.00,-33.08,-01.84;
V,060180,000020.003,,,,,0.00,-04.29,-33.08,-06.12;
V,060180,000021.003,,,,,0.00,-04.90,-30.63,-09.80;
V,060180,000022.003,,,,,0.00,-06.12,-34.30,-00.61;
V,060180,000023.003,,,,,0.00,-04.29,-36.14,-05.51;
V,060180,000024.003,,,,,0.00,-04.90,-34.91,-04.90;
V,060180,000025.003,,,,,0.00,-03.06,-34.30,-06.12;
V,060180,000026.003,,,,,0.00,-02.45,-34.30,-06.12;
V,060180,000027.003,,,,,0.00,-03.06,-34.91,-03.68;
V,060180,000028.003,,,,,0.00,-03.06,-34.91,-03.68;
V,060180,000029.003,,,,,0.00,-06.74,-36.14,-04.90;
V,060180,000030.003,,,,,0.00,-04.90,-35.53,-03.68;
V,060180,000031.003,,,,,0.00,-04.29,-34.30,-03.68;
V,060180,000032.003,,,,,0.00,-05.51,-36.75,-04.29;
V,060180,000033.003,,,,,0.00,-06.74,-34.30,-03.06;
V,060180,000034.003,,,,,0.00,-06.74,-35.53,-03.06;
V,060180,000035.003,,,,,0.00,-06.74,-34.91,-05.51;
V,060180,000036.003,,,,,0.00,-06.74,-33.08,-05.51;
V,060180,000037.003,,,,,0.00,-06.12,-35.53,-05.51;
V,060180,000038.003,,,,,0.00,-04.29,-34.91,-06.12;
V,060180,000039.003,,,,,0.00,-04.29,-34.91,-06.74;
V,060180,000040.003,,,,,0.00,-03.06,-35.53,-06.12;
V,060180,000041.003,,,,,0.00,+01.23,-34.91,-06.12;
V,060180,000042.003,,,,,0.00,-01.23,-34.91,-04.29;
V,060180,000043.003,,,,,0.00,-05.51,-34.91,-04.90;
V,060180,000044.003,,,,,0.00,+03.68,-33.69,-03.06;
V,060180,000045.003,,,,,0.00,-00.61,-35.53,-03.06;
V,060180,000046.003,,,,,0.00,-03.06,-34.91,-01.23;
V,060180,000047.003,,,,,0.00,-04.29,-33.08,+00.00;
V,060180,000048.003,,,,,0.00,-11.03,-35.53,-01.84;
V,060180,000049.003,,,,,0.00,-16.54,-39.20,-01.84;
V,060180,000050.003,,,,,0.00,+01.84,-34.30,-04.29;
V,060180,000051.003,,,,,0.00,-03.68,-35.53,-06.74;
V,060180,000052.003,,,,,0.00,-02.45,-34.91,-07.35;
V,060180,000053.003,,,,,0.00,+00.00,-36.75,-12.25;
V,060180,000054.003,,,,,0.00,+00.00,-34.30,-02.45;
V,060180,000055.003,,,,,0.00,+01.84,-33.08,+07.35;
V,060180,000056.003,,,,,0.00,-01.84,-37.36,+03.68;
V,060180,000057.003,,,,,0.00,-05.51,-33.69,+01.84;
V,060180,000058.003,,,,,0.00,-07.96,-34.30,+00.00;
V,060180,000059.003,,,,,0.00,-00.61,-36.14,-04.90;
V,060180,000100.218,,,,,0.00,+01.23,-34.91,-04.29;
V,060180,000101.218,,,,,0.00,+03.68,-36.14,+00.00;
V,060180,000102.218,,,,,0.00,+05.51,-34.91,-01.84;
V,060180,000103.218,,,,,0.00,+04.90,-33.08,-01.23;
V,060180,000104.218,,,,,0.00,-07.35,-33.08,+07.35;
V,060180,000105.218,,,,,0.00,-03.68,-34.91,+00.00;
V,060180,000106.218,,,,,0.00,-05.51,-35.53,-06.74;
V,060180,000107.218,,,,,0.00,-06.12,-33.69,-01.84;
V,090180,074216.092,,,,,0.00,+01.23,-36.75,+01.84;
V,090180,074217.092,,,,,0.00,-07.96,-35.53,-02.45;
V,090180,074218.092,,,,,0.00,-03.68,-34.91,-03.06;
V,090180,074219.092,,,,,0.00,-09.19,-32.46,-05.51;
V,090180,074220.092,,,,,0.00,-11.64,-34.91,-04.90;
V,090180,074221.092,,,,,0.00,-14.70,-37.98,-02.45;
V,090180,074222.092,,,,,0.00,-03.68,-36.75,-03.68;
V,090180,074223.092,,,,,0.00,-03.06,-34.91,-03.68;
V,090180,074224.092,,,,,0.00,-09.80,-33.69,-03.06;
V,090180,074225.092,,,,,0.00,-06.12,-33.69,-04.29;
V,090180,074226.092,,,,,0.00,-09.19,-37.36,-04.29;
V,090180,074227.092,,,,,0.00,+01.23,-32.46,-03.06;
V,090180,074228.092,,,,,0.00,-01.23,-34.30,-02.45;
V,090180,074229.092,,,,,0.00,-07.96,-34.91,-04.29;
V,090180,074230.092,,,,,0.00,-06.12,-36.75,-04.29;
V,090180,074231.092,,,,,0.00,-04.29,-36.14,-03.68;
V,140916,074232.092,,,,,0.00,-02.45,-36.75,-03.06;
V,140916,074233.092,,,,,0.00,-02.45,-35.53,-01.84;
V,140916,074234.092,,,,,0.00,-07.96,-35.53,-03.06;
V,140916,074235.092,,,,,0.00,-05.51,-36.14,-02.45;
V,140916,074236.092,,,,,0.00,-03.68,-36.14,-04.29;
V,140916,074237.092,,,,,0.00,-00.61,-34.91,-03.68;
V,140916,074238.092,,,,,0.00,-01.84,-34.91,-04.90;
V,140916,074239.092,,,,,0.00,-02.45,-35.53,-03.68;
V,140916,074240.092,,,,,0.00,-08.58,-35.53,-02.45;
V,140916,074241.092,,,,,0.00,-01.84,-35.53,-02.45;