PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/18-01:27:50
G01     76.5           33.3                5.5 +/-    1.31       8.9 +/-    1.31  0.030 / 0.050
G07     134.5          35.6                6.7 +/-    0.85      10.5 +/-    0.85  0.030 / 0.050
G11     59.5           35.9                5.3 +/-    1.31       8.2 +/-    1.31  0.050 / 0.040
G13     281.5          37.4                6.6 +/-    2.09      10.0 +/-    2.09  0.040 / 0.040
G15     306.0          14.7                2.7 +/-    1.89       6.7 +/-    1.89  0.070 / 0.060
G17     226.0          63.0                8.1 +/-    0.98       9.0 +/-    0.98  0.060 / 0.080
G19     220.9          38.0                7.3 +/-    1.84      11.1 +/-    1.84  0.030 / 0.060
G28     12.2           60.1                4.8 +/-    0.73       5.5 +/-    0.73  0.060 / 0.090
G30     130.0          61.7                7.3 +/-    0.34       8.2 +/-    0.34  0.080 / 0.090