PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/30-06:28:00
G01     224.1          15.0                7.0 +/-    1.39      17.4 +/-    1.39  0.140 / 0.240
G03     284.1          67.0                4.7 +/-    0.95       5.1 +/-    0.95  0.230 / 0.260
G09     296.8          12.2                7.2 +/-    1.66      19.1 +/-    1.66  0.130 / 0.300
G14     90.0           20.9                4.7 +/-    0.82      10.2 +/-    0.82  0.130 / 0.290
G16     147.4          47.1                7.8 +/-    0.70      10.2 +/-    0.70  0.090 / 0.220
G22     210.2          68.7                6.5 +/-    0.54       6.9 +/-    0.54  0.080 / 0.250
G23     308.4          37.8                4.8 +/-    1.31       7.3 +/-    1.31  0.030 / 0.040
G26     96.6           55.5                6.5 +/-    0.67       7.7 +/-    0.67  0.030 / 0.030
G31     45.7           31.2                3.1 +/-    0.41       5.3 +/-    0.41  0.040 / 0.040