PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/19-18:42:40
G02     31.0           57.0                8.6 +/-    0.42      10.0 +/-    0.42  0.030 / 0.040
G05     139.0          62.6               10.6 +/-    0.77      11.7 +/-    0.77  0.030 / 0.070
G06     54.8           13.3                6.9 +/-    1.28      17.9 +/-    1.28  0.040 / 0.050
G12     188.9          63.6                9.0 +/-    0.73       9.9 +/-    0.73  0.040 / 0.040
G19     99.4           12.2                8.6 +/-    1.64      22.8 +/-    1.64  0.050 / 0.050
G25     294.8          54.8                7.9 +/-    0.73       9.4 +/-    0.73  0.040 / 0.060
G29     307.1          27.2                5.9 +/-    1.09      11.0 +/-    1.09  0.090 / 0.150