PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/25-18:57:50
G02     278.2          80.1                8.2 +/-    0.76       8.4 +/-    0.76  0.090 / 0.140
G05     168.2          24.7               10.6 +/-    1.99      20.8 +/-    1.99  0.100 / 0.140
G06     40.5           47.0                8.1 +/-    0.82      10.6 +/-    0.82  0.190 / 0.190
G12     320.3          65.8                6.9 +/-    0.67       7.5 +/-    0.67  0.180 / 0.170
G17     78.9           16.4                9.9 +/-    1.88      23.7 +/-    1.88  0.270 / 0.220
G19     64.5           35.3               10.7 +/-    1.17      16.9 +/-    1.17  0.300 / 0.270
G24     234.4          28.6               10.8 +/-    1.48      19.4 +/-    1.48  0.030 / 0.040
G25     317.7          21.0                8.0 +/-    2.04      17.2 +/-    2.04  0.040 / 0.030