PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/18-19:12:50
G01     80.4           33.2               10.0 +/-    0.84      16.5 +/-    0.84  0.120 / 0.100
G07     132.3          38.7               14.1 +/-    0.96      21.0 +/-    0.96  0.130 / 0.100
G11     60.9           36.4               11.0 +/-    0.88      17.0 +/-    0.88  0.030 / 0.030
G13     284.8          37.6               12.7 +/-    0.88      19.2 +/-    0.88  0.030 / 0.040
G15     309.7          12.9                9.5 +/-    1.60      24.9 +/-    1.60  0.120 / 0.230
G17     222.2          58.4               14.8 +/-    1.97      17.0 +/-    1.97  0.260 / 0.230
G18     56.1           21.8                9.5 +/-    4.26      20.0 +/-    4.26  0.040 / 0.040
G19     219.0          33.2               14.3 +/-    2.10      23.6 +/-    2.10  0.040 / 0.050
G28     5.5            60.8               10.6 +/-    1.34      12.0 +/-    1.34  0.040 / 0.070
G30     124.8          68.5               13.8 +/-    0.53      14.7 +/-    0.53  0.040 / 0.070