PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/12-13:58:10
G01     122.6          15.2                9.4 +/-    2.90      23.2 +/-    2.90  0.040 / 0.030
G07     69.0           68.3                9.5 +/-    0.53      10.1 +/-    0.53  0.030 / 0.030
G08     46.8           34.8                8.4 +/-    1.11      13.4 +/-    1.11  0.030 / 0.030
G09     176.5          29.0               10.6 +/-    1.17      19.0 +/-    1.17  0.020 / 0.030
G11     111.5          38.2               10.3 +/-    1.50      15.4 +/-    1.50  0.120 / 0.210
G13     319.4          16.2                6.7 +/-    3.50      16.2 +/-    3.50  0.100 / 0.210
G17     200.9          20.0                9.9 +/-    2.21      21.8 +/-    2.21  0.120 / 0.320
G18     98.3           19.1                8.5 +/-    1.10      19.1 +/-    1.10  0.160 / 0.370
G28     285.1          55.5                8.2 +/-    2.61       9.7 +/-    2.61  0.170 / 0.270
G30     338.9          64.6                8.9 +/-    0.57       9.8 +/-    0.57  0.160 / 0.200