PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/23-02:57:40
G02     199.3          21.1                7.6 +/-    1.56      16.3 +/-    1.56  0.030 / 0.030
G06     173.8          50.6                6.8 +/-    0.95       8.5 +/-    0.95  0.040 / 0.040
G13     229.1          14.2                5.9 +/-    2.35      15.1 +/-    2.35  0.060 / 0.060
G17     17.1           62.4                3.9 +/-    0.46       4.4 +/-    0.46  0.040 / 0.060
G19     318.7          71.3                3.4 +/-    0.44       3.5 +/-    0.44  0.050 / 0.080
G24     311.5          27.8                2.4 +/-    1.52       4.4 +/-    1.52  0.100 / 0.100
G28     86.8           40.1                4.3 +/-    1.05       6.2 +/-    1.05  0.190 / 0.440
G30     155.7          12.6                5.9 +/-    1.84      15.5 +/-    1.84  0.180 / 0.680