PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/28-23:27:50
G01     56.1           28.9                8.9 +/-    1.89      15.9 +/-    1.89  0.110 / 0.210
G07     144.0          19.0               10.3 +/-    1.71      23.3 +/-    1.71  0.120 / 0.250
G11     47.5           22.5                7.8 +/-    1.80      16.1 +/-    1.80  0.050 / 0.060
G13     258.4          33.6               10.1 +/-    2.22      16.5 +/-    2.22  0.050 / 0.050
G15     289.6          16.6                8.9 +/-    1.60      21.2 +/-    1.60  0.110 / 0.400
G17     266.2          75.4                9.5 +/-    0.59       9.8 +/-    0.59  0.150 / 0.400
G18     40.4           10.7                8.4 +/-    1.77      23.2 +/-    1.77  0.090 / 0.200
G19     237.4          54.0               10.4 +/-    2.32      12.6 +/-    2.32  0.090 / 0.190
G28     43.1           55.1                8.2 +/-    1.48       9.8 +/-    1.48  0.040 / 0.040
G30     145.6          45.5               12.0 +/-    0.97      16.1 +/-    0.97  0.040 / 0.040