PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/25-19:27:50
G01     57.3           29.5               11.7 +/-    2.33      20.7 +/-    2.33  0.130 / 0.320
G07     143.5          20.1               13.0 +/-    2.39      28.5 +/-    2.39  0.130 / 0.250
G11     47.3           22.1               10.6 +/-    1.73      22.2 +/-    1.73  0.110 / 0.160
G13     259.3          34.2               15.5 +/-    0.87      25.0 +/-    0.87  0.140 / 0.190
G15     291.9          16.1               13.1 +/-    1.42      31.7 +/-    1.42  0.040 / 0.040
G17     263.7          75.5               15.2 +/-    0.67      15.7 +/-    0.67  0.040 / 0.040
G18     40.9           11.3               10.6 +/-    1.29      28.7 +/-    1.29  0.100 / 0.100
G19     235.4          51.5               15.2 +/-    1.79      18.9 +/-    1.79  0.090 / 0.090
G28     40.6           55.7               11.8 +/-    1.25      14.0 +/-    1.25  0.160 / 0.400
G30     145.4          48.9               14.4 +/-    0.72      18.5 +/-    0.72  0.190 / 0.300