PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/18-14:12:50
G01     106.9          25.6                9.3 +/-    1.00      17.8 +/-    1.00  0.030 / 0.030
G07     107.1          58.2               10.3 +/-    0.41      11.9 +/-    0.41  0.030 / 0.040
G08     41.8           19.6                6.4 +/-    0.91      14.2 +/-    0.91  0.070 / 0.130
G09     173.8          12.2                9.3 +/-    1.65      24.7 +/-    1.65  0.070 / 0.130
G11     88.0           42.6                9.1 +/-    0.37      12.6 +/-    0.37  0.030 / 0.040
G13     309.4          28.9                7.5 +/-    2.07      13.4 +/-    2.07  0.030 / 0.050
G17     205.9          38.0                9.3 +/-    0.70      14.0 +/-    0.70  0.050 / 0.050
G18     79.9           24.2                8.4 +/-    0.68      16.7 +/-    0.68  0.050 / 0.060
G28     318.0          61.0                8.1 +/-    0.97       9.2 +/-    0.97  0.040 / 0.060
G30     19.9           78.0                8.6 +/-    0.59       8.8 +/-    0.59  0.040 / 0.070