PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/17-05:27:50
G02     199.3          20.4                6.8 +/-    1.07      14.7 +/-    1.07  0.040 / 0.100
G06     175.9          48.4                6.7 +/-    2.08       8.6 +/-    2.08  0.040 / 0.080
G13     229.8          14.6                3.8 +/-    1.64       9.5 +/-    1.64  0.020 / 0.040
G17     18.9           61.7                3.7 +/-    0.67       4.2 +/-    0.67  0.030 / 0.040
G19     318.6          71.5                4.2 +/-    0.77       4.4 +/-    0.77  0.070 / 0.130
G24     312.1          27.1                1.5 +/-    1.92       2.8 +/-    1.92  0.070 / 0.150
G28     86.2           40.4                4.8 +/-    0.64       6.9 +/-    0.64  0.040 / 0.050
G30     155.9          14.0                7.4 +/-    2.27      18.8 +/-    2.27  0.040 / 0.040