前回の投稿で,SparkFun 製の GNSS NEO-M9N ユニットと SparkFun 製の OpenLog Artemis で作った GNSS ロガーのことを書いた。今回のその GNSS ログについて書こうと思う。
SparkFun 製
OpenLog Artemis は,Microcontroller の
Apollo 3 Blue MCU を持つ
Artemis Module で構成されたログ記録用のユニットである。それに SparkFun 製の
GPS Breakout - NEO-M9N, U.FL (Qwiic) という GNSS ユニット,LiPo バッテリーを組み合わせると簡単に GNSS ロガーができる。SW をつなげる以外はほぼコネクタをつなげるだけ,でできる。
その場合の GNSS のログは,OpenLog Artemis にプログラムされている形式で記録される。
以下にその例を示そう。
rtcDate,rtcTime,aX,aY,aZ,gX,gY,gZ,mX,mY,mZ,imu_degC,gps_Date,gps_Time,gps_Lat,gps_Long,gps_Alt,gps_SIV,gps_FixType,gps_GroundSpeed,gps_Heading,gps_pDOP,output_Hz,
01/01/2000,00:10:25.74,326.66,-913.57,-221.19,0.18,0.60,-0.25,-3.60,-5.10,-16.95,35.70,05/16/2023,05:58:15.000,350301689,1357728753,153510,0,0,0,23701918,9999,0.984,
01/01/2000,00:10:26.74,330.08,-923.34,-224.61,0.47,0.60,3.05,-3.30,-3.75,-18.90,35.46,05/16/2023,05:58:16.000,350301689,1357728753,153510,0,0,0,23701918,9999,0.984,
01/01/2000,00:10:27.75,326.66,-936.04,-217.29,-1.44,1.17,0.04,-4.20,-5.85,-13.05,35.46,05/16/2023,05:58:17.000,350301689,1357728753,153510,0,0,0,23701918,9999,0.984,
01/01/2000,00:10:28.75,330.57,-926.27,-238.77,-0.29,-1.0,-0.70,-2.85,-4.05,-15.15,35.46,05/16/2023,05:58:18.000,350301689,1357728753,153510,0,0,0,23701918,9999,0.984,
01/01/2000,00:10:29.76,330.08,-916.50,-208.50,0.27,-1.14,-0.30,-5.40,-4.35,-16.50,35.41,05/16/2023,05:58:19.000,350301689,1357728753,153510,0,0,0,23701918,9999,0.984,
01/01/2000,00:10:30.76,330.57,-923.34,-209.96,-1.18,1.53,-0.24,-4.20,-4.80,-15.90,35.70,05/16/2023,05:58:20.000,350301689,1357728753,153510,0,0,0,23701918,9999,0.984,
....
01/01/2000,00:37:46.67,320.80,-581.05,-425.29,-12.73,-6.39,-8.52,-23.55,6.45,-9.60,39.63,05/16/2023,06:25:37.000,348934290,1355106946,144510,0,0,0,25642680,9999,0.984,
01/01/2000,00:37:47.68,96.19,-470.70,-528.81,7.64,-4.62,-11.46,-20.70,9.0,-7.50,39.15,05/16/2023,06:25:38.000,348934290,1355106946,144510,0,0,0,25642680,9999,0.985,
01/01/2000,00:37:48.69,259.28,-1590.33,-871.58,-7.19,-3.47,-32.61,-24.0,14.25,-12.45,39.39,05/16/2023,06:25:39.000,348934290,1355106946,144510,0,0,0,25642680,9999,0.985,
01/01/2000,00:37:49.69,217.29,-411.13,-810.06,-6.67,21.91,39.07,-32.55,23.40,-10.35,39.24,05/16/2023,06:25:40.000,348934290,1355106946,144510,0,0,0,25642680,9999,0.985,
01/01/2000,00:37:50.70,490.72,-383.30,-527.83,10.15,1.86,14.40,-36.45,22.95,-18.30,39.48,05/16/2023,06:25:41.000,349718091,1358144528,145559,4,2,2749,25642680,258,0.985,
01/01/2000,00:37:51.71,259.77,-958.01,-951.66,-42.80,8.94,6.55,-43.95,24.0,-18.30,39.29,05/16/2023,06:25:42.000,349718458,1358144645,140839,7,3,1830,14312410,261,0.985,
01/01/2000,00:37:52.71,272.46,-431.15,-659.18,30.15,-22.78,-44.46,-37.65,23.85,-22.05,39.48,05/16/2023,06:25:43.000,349718704,1358143742,135256,7,3,1194,14318840,261,0.985,
01/01/2000,00:37:53.72,159.67,-394.53,-519.04,4.99,20.63,9.93,-33.45,21.75,-25.80,39.39,05/16/2023,06:25:44.000,349719339,1358143424,121481,9,3,890,13825742,240,0.985,
01/01/2000,00:37:54.73,-4.39,-623.05,-746.09,-17.57,28.05,82.57,-47.70,23.10,-20.70,39.39,05/16/2023,06:25:45.000,349719530,1358143564,118751,12,3,484,13825742,176,0.985,
01/01/2000,00:37:55.73,195.31,-1654.79,-700.20,5.57,-47.44,-106.35,-36.0,26.55,-22.20,39.48,05/16/2023,06:25:46.000,349719732,1358143546,113840,13,3,879,16785064,167,0.985,
01/01/2000,00:37:56.74,434.57,-520.02,-1026.86,-32.24,-12.02,4.37,-43.35,22.65,-19.50,39.29,05/16/2023,06:25:47.000,349719762,1358143542,110599,13,3,1022,17545512,167,0.985,