PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/18-11:58:10
G01     237.4          26.8                8.7 +/-    2.19      16.3 +/-    2.19  0.030 / 0.020
G03     308.6          58.3                5.3 +/-    1.12       6.1 +/-    1.12  0.030 / 0.030
G16     154.5          32.4                9.3 +/-    1.61      15.6 +/-    1.61  0.070 / 0.100
G18     212.3          17.2                5.4 +/-    3.49      12.8 +/-    3.49  0.070 / 0.090
G22     251.3          77.4                7.6 +/-    0.68       7.8 +/-    0.68  0.080 / 0.030
G23     299.2          31.7                6.3 +/-    1.85      10.7 +/-    1.85  0.040 / 0.030
G26     117.4          48.6                7.7 +/-    0.78       9.9 +/-    0.78  0.100 / 0.110
G31     41.8           42.5                4.2 +/-    1.28       5.9 +/-    1.28  0.090 / 0.150
G32     89.3           13.0                4.4 +/-    3.40      11.6 +/-    3.40  0.120 / 0.300