PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/13-12:27:50
G01     44.4           20.6                1.9 +/-    1.83       4.0 +/-    1.83  0.050 / 0.090
G06     175.1          34.0                5.5 +/-    1.27       8.8 +/-    1.27  0.050 / 0.080
G13     242.4          25.9                5.5 +/-    2.18      10.5 +/-    2.18  0.080 / 0.080
G15     281.7          12.9                4.3 +/-    0.61      11.2 +/-    0.61  0.070 / 0.080
G17     352.3          74.0                3.1 +/-    0.60       3.2 +/-    0.60  0.040 / 0.070
G19     256.4          61.2                3.4 +/-    0.76       3.8 +/-    0.76  0.040 / 0.070
G24     317.4          16.7                2.0 +/-    1.67       4.8 +/-    1.67  0.110 / 0.210
G28     62.8           50.2                2.0 +/-    0.49       2.6 +/-    0.49  0.110 / 0.190
G30     153.4          34.9                4.7 +/-    1.10       7.5 +/-    1.10  0.100 / 0.230