PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/21-15:58:10
G02     13.3           67.9                7.8 +/-    0.61       8.3 +/-    0.61  0.030 / 0.060
G05     158.2          49.1                9.7 +/-    1.36      12.4 +/-    1.36  0.040 / 0.050
G06     48.0           24.2                6.1 +/-    1.23      12.1 +/-    1.23  0.170 / 0.400
G12     216.8          78.2                8.5 +/-    0.76       8.7 +/-    0.76  0.200 / 0.480
G19     88.3           20.7                7.9 +/-    1.74      17.1 +/-    1.74  0.030 / 0.030
G24     213.9          10.1               10.9 +/-    8.13      30.2 +/-    8.13  0.020 / 0.030
G25     308.7          46.7                8.6 +/-    1.44      11.3 +/-    1.44  0.080 / 0.060
G29     298.5          18.9                6.7 +/-    1.46      15.2 +/-    1.46  0.080 / 0.080