PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/30-23:12:30
G07     317.2          51.3                7.2 +/-    1.02       9.0 +/-    1.02  0.200 / 0.430
G08     119.2          46.7                9.8 +/-    0.67      12.9 +/-    0.67  0.250 / 0.280
G09     252.1          82.6                9.2 +/-    1.44       9.2 +/-    1.44  0.070 / 0.070
G16     43.4           18.0                0.4 +/-    2.82       1.0 +/-    2.82  0.070 / 0.060
G23     150.2          53.4                8.3 +/-    0.74      10.1 +/-    0.74  0.110 / 0.270
G27     66.8           35.6                7.6 +/-    1.33      11.9 +/-    1.33  0.250 / 0.300
G28     229.3          20.8                7.6 +/-    3.05      16.4 +/-    3.05  0.040 / 0.050
G30     294.7          30.8                9.2 +/-    1.69      15.9 +/-    1.69  0.030 / 0.040