PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/20-01:13:10
G02     199.3          20.1               10.3 +/-    2.39      22.5 +/-    2.39  0.050 / 0.070
G06     172.8          50.7                8.8 +/-    0.73      11.0 +/-    0.73  0.040 / 0.070
G13     229.5          14.6               11.1 +/-    1.69      27.9 +/-    1.69  0.050 / 0.030
G17     13.8           63.9                5.2 +/-    0.56       5.7 +/-    0.56  0.040 / 0.030
G19     314.3          71.3                5.6 +/-    0.41       5.9 +/-    0.41  0.030 / 0.030
G24     311.8          27.5                7.3 +/-    1.77      13.4 +/-    1.77  0.040 / 0.040
G28     85.8           40.6                7.3 +/-    1.12      10.5 +/-    1.12  0.260 / 0.390
G30     155.9          14.3                9.5 +/-    1.60      24.2 +/-    1.60  0.140 / 0.330