PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/13-13:58:10
G02     200.3          15.5                8.0 +/-    2.48      19.5 +/-    2.48  0.060 / 0.070
G06     173.4          48.7                7.6 +/-    0.76       9.7 +/-    0.76  0.060 / 0.080
G13     232.2          16.1                7.4 +/-    1.74      17.9 +/-    1.74  0.070 / 0.160
G17     20.9           61.1                6.6 +/-    0.49       7.5 +/-    0.49  0.070 / 0.190
G19     315.7          72.1                6.0 +/-    0.78       6.3 +/-    0.78  0.030 / 0.040
G24     313.6          25.1                7.2 +/-    1.83      14.0 +/-    1.83  0.030 / 0.040
G28     83.8           41.7                5.2 +/-    0.98       7.4 +/-    0.98  0.060 / 0.110
G30     156.9          19.8                8.5 +/-    2.41      18.8 +/-    2.41  0.040 / 0.100