PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/23-18:27:20
G02     225.6          66.9               10.1 +/-    1.88      10.9 +/-    1.88  0.040 / 0.080
G06     44.4           64.2                8.9 +/-    0.46       9.7 +/-    0.46  0.040 / 0.060
G12     321.9          47.8                7.1 +/-    1.14       9.2 +/-    1.14  0.040 / 0.060
G17     64.7           26.8                8.4 +/-    0.66      15.8 +/-    0.66  0.040 / 0.050
G19     46.2           46.0                8.9 +/-    1.11      11.8 +/-    1.11  0.060 / 0.090
G24     252.4          38.7               10.8 +/-    1.02      16.0 +/-    1.02  0.060 / 0.090