PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/21-17:13:10
G01     317.0          22.0                5.4 +/-    2.88      11.2 +/-    2.88  0.100 / 0.240
G08     254.3          10.5                6.9 +/-    3.03      19.1 +/-    3.03  0.090 / 0.240
G10     87.1           50.7                8.1 +/-    0.68      10.1 +/-    0.68  0.110 / 0.180
G11     299.9          24.1                7.8 +/-    1.50      15.6 +/-    1.50  0.090 / 0.200
G14     311.5          70.8                7.7 +/-    0.79       8.1 +/-    0.79  0.060 / 0.050
G18     107.0          23.4                8.4 +/-    0.72      17.1 +/-    0.72  0.050 / 0.070
G22     303.2          14.5                6.4 +/-    1.93      16.2 +/-    1.93  0.120 / 0.300
G25     97.1           10.8               -2.3 +/-   38.90      -6.3 +/-   38.90  0.140 / 0.360
G31     175.0          47.7               11.0 +/-    1.28      14.3 +/-    1.28  0.040 / 0.060
G32     16.7           63.6                6.7 +/-    0.55       7.3 +/-    0.55  0.040 / 0.040