PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/30-15:42:50
G01     99.0           29.2                9.7 +/-    0.98      17.2 +/-    0.98  0.030 / 0.060
G07     117.4          52.3                9.9 +/-    0.49      12.2 +/-    0.49  0.030 / 0.050
G08     41.8           14.1                6.6 +/-    0.94      16.7 +/-    0.94  0.030 / 0.040
G11     78.1           42.1               10.6 +/-    0.68      14.9 +/-    0.68  0.040 / 0.040
G13     302.7          33.0                9.6 +/-    1.13      15.8 +/-    1.13  0.070 / 0.140
G17     209.7          44.8                8.2 +/-    1.19      11.0 +/-    1.19  0.070 / 0.120
G18     71.9           24.7                9.8 +/-    0.88      19.4 +/-    0.88  0.060 / 0.130
G19     211.8          17.7               10.0 +/-    1.27      23.2 +/-    1.27  0.060 / 0.150
G28     333.5          61.8                7.4 +/-    0.59       8.3 +/-    0.59  0.040 / 0.080
G30     64.7           79.9                9.1 +/-    0.82       9.2 +/-    0.82  0.040 / 0.070