POS File
The POS File contains information such as GPS time, longitude, latitude, height, roll, pitch, heading, GridX and GridY. GPS time, longitude, latitude, height, roll, pitch and heading must be necessary, while longitude and latitude or GridX and GridY include at least one. If POS file doesn't include GridX and GridY, we need to set projection coordinate system when we input trajectory files. GridX and GridY can be calculated according to projection coordinate system, longitude and latitude in strip alignment module.
The trajectory information stored in its file is structured as follows:
| Data | Units | Type |
|---|---|---|
| GPS time | seconds | double |
| longitude | degree | double |
| latitude | degree | double |
| height | meters | double |
| roll | degree | double |
| pitch | degree | double |
| heading | degree | double |
| GridX(Optional) | meters | double |
| GridY(Optional) | meters | double |
The examples the POS file is shown below. Example 1(not including GridX，GridY):
380954.000,112.5311950876, 26.8969520123,378.543, 7.1701230000, 3.0890110000,-39.4065340000
380954.008,112.5311938923, 26.8969533249,378.537, 7.2001860000, 3.0914780000,-39.4034150000
380954.016,112.5311926975, 26.8969546376,378.531, 7.2368710000, 3.0936380000,-39.4011190000
380954.024,112.5311915034, 26.8969559507,378.525, 7.2683090000, 3.1015050000,-39.3975470000
380954.032,112.5311903098, 26.8969572641,378.518, 7.3007560000, 3.1115160000,-39.3929590000
380954.040,112.5311891169, 26.8969585779,378.512, 7.3269790000, 3.1179720000,-39.3878260000
380954.048,112.5311879247, 26.8969598920,378.506, 7.3525870000, 3.1180460000,-39.3804020000
380954.056,112.5311867331, 26.8969612065,378.500, 7.3745730000, 3.1151630000,-39.3713830000
Example 2(including GridX，GridY):
383207.336,112.5421590662,26.9034172036,313.865,3.538615,2.660518,-67.848653,653147.099716932,2976670.62354689
383207.344,112.5421572108,26.9034177865,313.861,3.533299,2.659177,-67.840828,653146.914649722,2976670.68587654
383207.352,112.5421553554,26.9034183697,313.857,3.522385,2.658042,-67.828619,653146.729582108,2976670.74823943
383207.36,112.5421535001,26.9034189529,313.854,3.512757,2.659231,-67.816251,653146.544524429,2976670.81060244
383207.368,112.5421516447,26.9034195363,313.85,3.502656,2.662677,-67.807435,653146.35945655,2976670.87298749
383207.376,112.5421497892,26.9034201198,313.846,3.502243,2.664987,-67.803265,653146.174378605,2976670.9353835
383207.384,112.5421479336,26.9034207035,313.843,3.500293,2.668456,-67.80232,653145.989290462,2976670.99780155
383207.392,112.5421460783,26.9034212874,313.839,3.501546,2.671267,-67.797563,653145.804231844,2976671.06024212
383207.4,112.5421442231,26.9034218713,313.835,3.496569,2.674773,-67.789195,653145.619183163,2976671.12268281
383207.408,112.542142368,26.9034224554,313.832,3.483849,2.676885,-67.774991,653145.434144147,2976671.18514579
383207.416,112.5421405129,26.9034230395,313.828,3.471533,2.676137,-67.765536,653145.24910513,2976671.24760876
383207.424,112.5421386577,26.9034236237,313.824,3.47028,2.675779,-67.760612,653145.064056049,2976671.3100827
383207.432,112.5421368024,26.9034242079,313.82,3.475101,2.677064,-67.761833,653144.878997039,2976671.37255652
383207.44,112.5421349471,26.9034247923,313.817,3.476053,2.681571,-67.761664,653144.69393776,2976671.43505249