PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/17-01:57:50
G01     62.5           31.3                5.2 +/-    1.79       8.9 +/-    1.79  0.030 / 0.040
G06     182.1          11.5                1.0 +/-   27.60       2.7 +/-   27.60  0.040 / 0.040
G07     141.3          24.6                7.8 +/-    1.75      15.3 +/-    1.75  0.130 / 0.360
G11     50.7           27.7                3.5 +/-    2.43       6.4 +/-    2.43  0.160 / 0.340
G13     266.2          35.8                6.9 +/-    1.31      10.8 +/-    1.31  0.030 / 0.060
G15     295.2          16.7                4.9 +/-    1.72      11.6 +/-    1.72  0.040 / 0.070
G17     249.3          73.4                6.7 +/-    1.16       7.0 +/-    1.16  0.050 / 0.100
G19     230.7          49.1                7.4 +/-    1.89       9.5 +/-    1.89  0.050 / 0.090
G28     33.2           57.0                4.0 +/-    1.04       4.6 +/-    1.04  0.070 / 0.140
G30     141.2          50.0                8.4 +/-    1.53      10.6 +/-    1.53  0.090 / 0.160