PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/18-12:12:40
G01     232.2          22.4                8.2 +/-    2.11      17.0 +/-    2.11  0.030 / 0.040
G03     300.7          63.8                7.3 +/-    0.74       8.1 +/-    0.74  0.030 / 0.040
G16     150.5          38.6                9.8 +/-    1.34      14.6 +/-    1.34  0.060 / 0.090
G18     208.5          12.6                5.8 +/-    1.91      15.4 +/-    1.91  0.060 / 0.080
G22     223.5          75.0                7.9 +/-    0.41       8.1 +/-    0.41  0.040 / 0.030
G23     304.1          35.9                5.6 +/-    1.17       8.8 +/-    1.17  0.040 / 0.020
G26     107.5          51.7                9.1 +/-    0.46      11.2 +/-    0.46  0.120 / 0.170
G31     43.3           36.7                5.3 +/-    1.47       8.2 +/-    1.47  0.150 / 0.200