PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/20-15:58:00
G01     49.4           25.0                8.1 +/-    0.69      15.8 +/-    0.69  0.050 / 0.060
G06     176.2          27.4               12.8 +/-    0.71      23.8 +/-    0.71  0.050 / 0.060
G07     146.5          11.7               11.3 +/-    1.70      30.3 +/-    1.70  0.060 / 0.090
G11     44.3           13.8                7.3 +/-    1.76      18.6 +/-    1.76  0.060 / 0.130
G13     249.4          30.0               10.4 +/-    1.28      18.3 +/-    1.28  0.070 / 0.280
G15     285.4          14.8                7.1 +/-    1.60      17.7 +/-    1.60  0.170 / 0.250
G17     319.0          78.3                9.6 +/-    0.82       9.7 +/-    0.82  0.040 / 0.070
G19     246.1          57.6               11.0 +/-    1.02      12.8 +/-    1.02  0.040 / 0.060
G28     53.6           52.6                9.3 +/-    0.27      11.4 +/-    0.27  0.120 / 0.250
G30     150.4          41.4               12.3 +/-    0.66      17.5 +/-    0.66  0.120 / 0.240