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                7.9 +/-    1.43       9.8 +/-    1.43  0.060 / 0.090
G08     119.2          46.7               10.3 +/-    1.03      13.5 +/-    1.03  0.040 / 0.060
G09     252.1          82.6                7.6 +/-    1.05       7.7 +/-    1.05  0.070 / 0.240
G16     43.4           18.0               -0.0 +/-    1.02      -0.0 +/-    1.02  0.080 / 0.210
G23     150.2          53.4                8.4 +/-    0.55      10.2 +/-    0.55  0.030 / 0.070
G27     66.8           35.6                7.2 +/-    0.71      11.3 +/-    0.71  0.030 / 0.060
G28     229.3          20.8                8.8 +/-    2.27      19.0 +/-    2.27  0.090 / 0.240
G30     294.7          30.8                9.3 +/-    1.80      16.1 +/-    1.80  0.100 / 0.270