PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/11/21-07:12:50
G01     56.2           29.0                3.1 +/-    1.82       5.5 +/-    1.82  0.140 / 0.140
G06     179.4          18.0                5.3 +/-    1.59      12.2 +/-    1.59  0.100 / 0.100
G07     143.5          17.2                4.6 +/-    0.62      10.9 +/-    0.62  0.040 / 0.040
G11     46.0           19.3                2.6 +/-    1.58       5.9 +/-    1.58  0.040 / 0.040
G13     257.5          34.1                7.2 +/-    0.85      11.6 +/-    0.85  0.090 / 0.110
G15     292.5          15.5                2.0 +/-    1.36       5.0 +/-    1.36  0.070 / 0.120
G17     288.4          80.1                6.1 +/-    0.72       6.1 +/-    0.72  0.040 / 0.050
G19     235.7          51.2                6.9 +/-    2.13       8.6 +/-    2.13  0.040 / 0.040
G28     39.1           56.4                4.3 +/-    0.49       5.0 +/-    0.49  0.020 / 0.020
G30     146.6          50.2                6.6 +/-    1.87       8.3 +/-    1.87  0.030 / 0.010