PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/19-22:27:50
G07     340.7          60.6               10.9 +/-    1.20      12.3 +/-    1.20  0.030 / 0.050
G08     93.4           53.5               11.1 +/-    0.86      13.5 +/-    0.86  0.040 / 0.050
G09     188.2          68.9               11.4 +/-    0.86      12.2 +/-    0.86  0.070 / 0.160
G11     144.7          15.6               14.6 +/-    2.87      35.8 +/-    2.87  0.070 / 0.140
G23     156.6          34.7               10.9 +/-    1.51      17.4 +/-    1.51  0.050 / 0.090
G27     49.8           28.0                7.1 +/-    1.07      13.0 +/-    1.07  0.070 / 0.090
G28     242.1          34.3               14.6 +/-    1.79      23.4 +/-    1.79  0.040 / 0.110
G30     309.1          42.2                7.8 +/-    1.39      11.0 +/-    1.39  0.050 / 0.080