PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/16-13:42:50
G01     95.5           29.6                9.5 +/-    0.90      16.7 +/-    0.90  0.170 / 0.260
G07     120.7          46.5                9.0 +/-    1.05      11.9 +/-    1.05  0.140 / 0.250
G08     41.9           14.6                6.1 +/-    1.97      15.3 +/-    1.97  0.040 / 0.060
G11     75.1           42.4                8.2 +/-    1.00      11.5 +/-    1.00  0.040 / 0.050
G13     299.9          35.0                6.8 +/-    0.96      10.8 +/-    0.96  0.060 / 0.150
G17     210.4          44.7                9.5 +/-    0.83      12.8 +/-    0.83  0.070 / 0.110
G18     68.5           24.3                7.8 +/-    1.63      15.4 +/-    1.63  0.040 / 0.050
G19     211.3          23.2                7.8 +/-    1.41      15.9 +/-    1.41  0.040 / 0.060
G28     324.8          60.6                6.6 +/-    0.64       7.5 +/-    0.64  0.030 / 0.050
G30     84.8           78.4                9.0 +/-    0.56       9.2 +/-    0.56  0.040 / 0.040