PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/07-12:58:00
G01     103.7          27.2                5.4 +/-    1.60      10.0 +/-    1.60  0.030 / 0.020
G07     111.8          55.6                7.2 +/-    0.61       8.5 +/-    0.61  0.030 / 0.030
G08     41.6           16.1                4.9 +/-    2.13      11.8 +/-    2.13  0.040 / 0.030
G11     83.0           42.3                6.9 +/-    1.19       9.7 +/-    1.19  0.040 / 0.030
G13     306.7          30.8                5.7 +/-    0.86       9.8 +/-    0.86  0.090 / 0.150
G17     206.9          42.2                7.6 +/-    1.64      10.7 +/-    1.64  0.070 / 0.130
G18     76.2           24.4                6.4 +/-    1.99      12.6 +/-    1.99  0.070 / 0.120
G19     210.5          13.0                1.8 +/-    6.08       4.6 +/-    6.08  0.060 / 0.120
G28     324.1          61.4                4.1 +/-    0.72       4.7 +/-    0.72  0.060 / 0.110
G30     32.1           79.4                5.9 +/-    0.41       6.0 +/-    0.41  0.070 / 0.110