PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/01-02:27:20
G02     39.4           50.0                7.0 +/-    1.19       8.8 +/-    1.19  0.040 / 0.020
G05     122.9          66.5                9.3 +/-    0.51      10.1 +/-    0.51  0.040 / 0.020
G06     57.1           11.4                6.7 +/-    2.44      18.2 +/-    2.44  0.030 / 0.010
G12     193.7          61.5               10.4 +/-    1.02      11.7 +/-    1.02  0.030 / 0.010
G25     288.7          55.8                8.1 +/-    1.31       9.6 +/-    1.31  0.100 / 0.170
G29     311.0          31.7                8.9 +/-    1.85      15.1 +/-    1.85  0.110 / 0.200