PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/27-20:57:30
G02     21.6           64.0                8.5 +/-    0.83       9.3 +/-    0.83  0.050 / 0.050
G05     154.1          54.3               11.3 +/-    0.83      13.6 +/-    0.83  0.050 / 0.040
G06     50.8           20.5                7.1 +/-    2.43      15.5 +/-    2.43  0.050 / 0.050
G12     207.3          73.7               10.8 +/-    0.24      11.2 +/-    0.24  0.040 / 0.060
G19     95.9           12.0                9.4 +/-    1.47      25.0 +/-    1.47  0.030 / 0.030
G20     197.1          21.2               13.3 +/-    1.73      28.4 +/-    1.73  0.040 / 0.030
G25     301.5          53.4                9.2 +/-    0.96      11.1 +/-    0.96  0.080 / 0.120
G29     303.5          24.6                7.6 +/-    1.06      15.0 +/-    1.06  0.110 / 0.120