PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/31-03:13:10
G01     96.5           29.9                4.7 +/-    0.59       8.2 +/-    0.59  0.040 / 0.050
G07     120.6          47.6                6.0 +/-    0.67       7.8 +/-    0.67  0.040 / 0.060
G11     73.2           40.9                5.1 +/-    0.67       7.3 +/-    0.67  0.030 / 0.060
G13     300.3          34.5                5.4 +/-    1.39       8.7 +/-    1.39  0.050 / 0.060
G17     209.5          50.8                7.1 +/-    1.07       8.9 +/-    1.07  0.060 / 0.170
G18     65.7           23.0                2.8 +/-    1.14       5.7 +/-    1.14  0.060 / 0.180
G19     212.1          20.3                6.0 +/-    1.81      13.1 +/-    1.81  0.060 / 0.140
G28     332.6          61.6                3.5 +/-    0.87       4.0 +/-    0.87  0.060 / 0.110
G30     73.7           80.1                5.2 +/-    0.53       5.3 +/-    0.53  0.030 / 0.030