PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/18-23:42:50
G01     99.5           28.7                9.3 +/-    1.05      16.8 +/-    1.05  0.040 / 0.050
G07     118.0          48.5                9.6 +/-    0.58      12.3 +/-    0.58  0.040 / 0.050
G08     41.5           12.5                6.3 +/-    1.16      16.6 +/-    1.16  0.300 / 0.330
G11     77.0           41.8                8.5 +/-    1.09      12.0 +/-    1.09  0.160 / 0.280
G13     303.1          33.2                6.0 +/-    2.73       9.9 +/-    2.73  0.090 / 0.120
G17     207.9          47.2                9.1 +/-    0.82      11.8 +/-    0.82  0.100 / 0.130
G18     68.8           23.3                6.6 +/-    1.32      13.4 +/-    1.32  0.040 / 0.040
G19     210.9          18.7                9.1 +/-    2.07      20.6 +/-    2.07  0.030 / 0.040
G28     325.0          61.1                7.1 +/-    0.59       8.0 +/-    0.59  0.080 / 0.120
G30     61.5           80.0                7.8 +/-    0.44       7.9 +/-    0.44  0.080 / 0.150