PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/12-19:12:30
G02     225.7          67.3               12.2 +/-    0.93      13.1 +/-    0.93  0.080 / 0.080
G06     44.4           64.4                9.8 +/-    0.44      10.8 +/-    0.44  0.120 / 0.080
G12     321.7          47.3                9.5 +/-    0.61      12.4 +/-    0.61  0.030 / 0.030
G17     64.4           27.2                6.8 +/-    2.30      12.7 +/-    2.30  0.040 / 0.030
G19     46.4           45.8                9.5 +/-    1.12      12.6 +/-    1.12  0.060 / 0.050
G24     252.6          38.7               13.0 +/-    2.41      19.3 +/-    2.41  0.040 / 0.060