PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/12-19:42:40
G02     70.3           24.5               11.2 +/-    0.91      22.1 +/-    0.91  0.040 / 0.040
G05     47.8           53.4               10.3 +/-    0.25      12.4 +/-    0.25  0.050 / 0.040
G12     182.4          18.7               14.6 +/-    3.56      33.2 +/-    3.56  0.080 / 0.320
G13     118.6          24.3               13.7 +/-    1.14      27.1 +/-    1.14  0.120 / 0.260
G15     156.5          22.9               14.5 +/-    0.92      29.8 +/-    0.92  0.050 / 0.100
G18     222.5          12.7                9.9 +/-   10.00      26.0 +/-   10.00  0.060 / 0.090
G20     219.9          75.9               14.4 +/-    0.73      14.8 +/-    0.73  0.030 / 0.050
G21     282.7          26.6               13.1 +/-    1.86      24.7 +/-    1.86  0.030 / 0.040
G25     216.9          39.2               14.7 +/-    2.24      21.6 +/-    2.24  0.090 / 0.180
G29     343.7          71.9               12.9 +/-    0.75      13.5 +/-    0.75  0.070 / 0.200