PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/31-14:58:00
G02     208.2          42.1               10.3 +/-    0.95      14.5 +/-    0.95  0.040 / 0.070
G06     115.6          78.0                9.3 +/-    0.51       9.5 +/-    0.51  0.040 / 0.100
G12     314.5          28.6                7.9 +/-    0.94      14.3 +/-    0.94  0.060 / 0.140
G17     46.9           39.9                8.6 +/-    0.66      12.6 +/-    0.66  0.060 / 0.120
G19     13.2           61.0                8.0 +/-    0.48       9.0 +/-    0.48  0.030 / 0.030
G24     282.8          42.8                6.8 +/-    0.88       9.5 +/-    0.88  0.030 / 0.030
G28     111.7          24.3                8.8 +/-    1.38      17.4 +/-    1.38  0.040 / 0.040