PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/26-14:27:40
G01     81.9           33.1                5.6 +/-    1.20       9.2 +/-    1.20  0.030 / 0.030
G07     131.3          39.4                7.9 +/-    0.96      11.7 +/-    0.96  0.030 / 0.030
G11     60.7           35.9                7.0 +/-    1.00      10.9 +/-    1.00  0.050 / 0.060
G13     286.1          37.7                7.8 +/-    0.62      11.8 +/-    0.62  0.070 / 0.060
G15     312.5          11.0               -2.9 +/-   18.37      -7.9 +/-   18.37  0.070 / 0.100
G17     220.5          60.8                8.2 +/-    1.68       9.2 +/-    1.68  0.070 / 0.090
G18     56.7           21.8                5.7 +/-    2.40      12.0 +/-    2.40  0.060 / 0.110
G19     218.2          30.4                8.5 +/-    3.07      14.7 +/-    3.07  0.070 / 0.090
G28     2.2            61.1                6.2 +/-    0.50       6.9 +/-    0.50  0.170 / 0.220
G30     121.5          71.7                7.5 +/-    0.49       7.9 +/-    0.49  0.240 / 0.190