PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/13-14:57:40
G02     31.0           56.8                7.2 +/-    1.40       8.4 +/-    1.40  0.030 / 0.040
G05     146.9          61.3                9.1 +/-    0.69      10.2 +/-    0.69  0.040 / 0.050
G06     54.4           14.6                5.0 +/-    3.24      12.6 +/-    3.24  0.030 / 0.040
G12     193.8          65.6                8.5 +/-    0.38       9.2 +/-    0.38  0.030 / 0.030
G19     99.5           12.2                7.6 +/-    1.48      20.3 +/-    1.48  0.170 / 0.270
G25     291.6          56.7                8.1 +/-    1.57       9.5 +/-    1.57  0.160 / 0.300
G29     307.9          28.4                6.3 +/-    1.10      11.3 +/-    1.10  0.130 / 0.180