PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/30-15:27:50
G01     106.3          26.0               10.4 +/-    0.99      19.9 +/-    0.99  0.030 / 0.040
G07     108.0          57.8               10.9 +/-    0.30      12.7 +/-    0.30  0.030 / 0.050
G08     41.9           19.9                8.1 +/-    0.82      17.9 +/-    0.82  0.020 / 0.040
G09     174.0          12.0                9.1 +/-    1.70      24.3 +/-    1.70  0.020 / 0.030
G11     87.7           42.8               10.6 +/-    0.49      14.7 +/-    0.49  0.070 / 0.120
G13     308.9          29.2                8.4 +/-    1.55      15.0 +/-    1.55  0.080 / 0.150
G17     206.4          37.8               10.8 +/-    1.24      16.3 +/-    1.24  0.090 / 0.210
G18     79.4           24.4                9.5 +/-    0.77      18.7 +/-    0.77  0.090 / 0.170
G28     319.4          61.1                7.8 +/-    0.75       8.8 +/-    0.75  0.040 / 0.080
G30     25.2           78.4                9.9 +/-    0.49      10.1 +/-    0.49  0.040 / 0.080