PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/04-22:58:00
G01     56.7           29.2               12.5 +/-    1.73      22.3 +/-    1.73  0.130 / 0.250
G07     143.8          19.6               13.4 +/-    1.86      29.7 +/-    1.86  0.160 / 0.290
G11     47.6           22.8                9.5 +/-    1.61      19.5 +/-    1.61  0.080 / 0.100
G13     259.0          33.8               15.4 +/-    1.07      25.0 +/-    1.07  0.070 / 0.090
G15     290.3          16.5               11.4 +/-    1.26      27.3 +/-    1.26  0.060 / 0.040
G17     262.8          74.7               14.4 +/-    0.44      14.8 +/-    0.44  0.060 / 0.050
G18     40.7           11.1                9.8 +/-    2.07      26.7 +/-    2.07  0.170 / 0.320
G19     236.5          53.3               16.1 +/-    2.21      19.5 +/-    2.21  0.130 / 0.450
G28     42.1           55.3               11.1 +/-    0.98      13.2 +/-    0.98  0.090 / 0.180
G30     145.3          46.4               14.5 +/-    0.89      19.2 +/-    0.89  0.090 / 0.230