PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/31-19:12:50
G02     1.8            73.4                8.8 +/-    0.57       9.2 +/-    0.57  0.040 / 0.060
G05     160.2          42.1               12.0 +/-    1.00      16.8 +/-    1.00  0.040 / 0.070
G06     44.8           30.5                6.3 +/-    0.68      11.0 +/-    0.68  0.030 / 0.030
G12     267.2          81.5                8.3 +/-    0.55       8.4 +/-    0.55  0.030 / 0.030
G19     81.3           24.7                9.0 +/-    0.54      17.8 +/-    0.54  0.040 / 0.040
G24     220.6          16.2               10.0 +/-    1.98      24.1 +/-    1.98  0.040 / 0.040
G25     314.7          37.4                7.5 +/-    2.06      11.5 +/-    2.06  0.050 / 0.110
G29     291.9          12.9               12.0 +/-    1.95      31.4 +/-    1.95  0.060 / 0.090