PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/23-17:58:10
G02     16.1           66.9                8.3 +/-    0.42       8.9 +/-    0.42  0.040 / 0.040
G05     154.6          51.0               11.6 +/-    1.10      14.4 +/-    1.10  0.030 / 0.050
G06     48.6           22.7                6.9 +/-    2.61      14.2 +/-    2.61  0.090 / 0.070
G12     205.8          77.0                9.2 +/-    0.38       9.4 +/-    0.38  0.070 / 0.070
G19     89.0           19.7                9.9 +/-    1.87      21.9 +/-    1.87  0.030 / 0.030
G25     309.2          45.7                9.1 +/-    1.85      12.1 +/-    1.85  0.030 / 0.030
G29     298.4          18.6                9.3 +/-    2.68      21.2 +/-    2.68  0.060 / 0.120