PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/21-16:12:30
G02     217.7          58.3               11.6 +/-    0.75      13.4 +/-    0.75  0.070 / 0.090
G06     53.1           70.9               10.4 +/-    0.88      11.0 +/-    0.88  0.070 / 0.090
G12     320.5          42.0                9.0 +/-    1.87      12.7 +/-    1.87  0.050 / 0.080
G17     59.3           30.2                9.1 +/-    0.59      15.8 +/-    0.59  0.030 / 0.080
G19     36.5           51.2                8.9 +/-    0.39      11.1 +/-    0.39  0.040 / 0.060
G24     261.3          41.6                9.2 +/-    1.14      13.1 +/-    1.14  0.040 / 0.050
G28     123.3          13.0               10.9 +/-    2.06      28.4 +/-    2.06  0.030 / 0.040