PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/20-15:57:40
G01     80.0           32.7               10.1 +/-    0.49      16.8 +/-    0.49  0.040 / 0.070
G07     131.9          33.9               12.1 +/-    0.66      19.6 +/-    0.66  0.040 / 0.090
G11     59.7           36.3                9.1 +/-    0.32      14.2 +/-    0.32  0.050 / 0.060
G13     284.3          38.6               10.3 +/-    1.44      15.4 +/-    1.44  0.040 / 0.060
G15     309.1          13.3                9.6 +/-    1.23      24.9 +/-    1.23  0.050 / 0.140
G17     220.3          59.4               13.1 +/-    0.80      15.0 +/-    0.80  0.060 / 0.140
G18     55.0           21.2                7.4 +/-    0.97      15.8 +/-    0.97  0.070 / 0.090
G19     217.7          35.3               12.7 +/-    1.05      20.1 +/-    1.05  0.100 / 0.120
G28     352.1          61.6               10.3 +/-    1.07      11.5 +/-    1.07  0.050 / 0.030
G30     125.2          66.9               10.6 +/-    0.42      11.4 +/-    0.42  0.030 / 0.020