PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/23-13:42:50
G01     111.1          23.2                9.6 +/-    2.88      19.6 +/-    2.88  0.020 / 0.030
G07     99.8           61.3                9.7 +/-    0.86      10.9 +/-    0.86  0.020 / 0.030
G08     42.3           23.1                7.2 +/-    1.66      14.7 +/-    1.66  0.030 / 0.040
G09     174.5          16.0                7.8 +/-    2.53      18.9 +/-    2.53  0.030 / 0.030
G11     93.9           42.3                9.9 +/-    0.67      13.8 +/-    0.67  0.120 / 0.180
G13     312.6          26.1                6.8 +/-    1.49      13.0 +/-    1.49  0.070 / 0.180
G17     204.1          33.8               10.5 +/-    1.52      17.0 +/-    1.52  0.110 / 0.110
G18     84.5           23.4                8.0 +/-    1.95      16.1 +/-    1.95  0.080 / 0.140
G28     309.2          60.1                7.5 +/-    1.00       8.5 +/-    1.00  0.090 / 0.170
G30     3.7            75.0                8.1 +/-    0.49       8.4 +/-    0.49  0.090 / 0.170