PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/22-14:57:50
G01     104.2          26.7               10.0 +/-    0.99      18.9 +/-    0.99  0.180 / 0.440
G07     112.0          52.7                9.3 +/-    0.46      11.3 +/-    0.46  0.130 / 0.450
G08     41.6           16.5                7.0 +/-    1.99      16.7 +/-    1.99  0.090 / 0.150
G09     173.4          10.4                8.5 +/-    4.77      23.6 +/-    4.77  0.080 / 0.110
G11     82.7           40.3                8.4 +/-    0.84      12.2 +/-    0.84  0.040 / 0.020
G13     309.1          28.5                6.5 +/-    2.08      11.8 +/-    2.08  0.040 / 0.020
G17     206.2          42.8                9.1 +/-    0.84      12.7 +/-    0.84  0.040 / 0.030
G19     209.5          16.8                9.0 +/-    3.21      21.5 +/-    3.21  0.040 / 0.040
G28     322.8          61.1                7.3 +/-    0.55       8.2 +/-    0.55  0.070 / 0.120
G30     21.7           78.3                8.6 +/-    0.67       8.8 +/-    0.67  0.090 / 0.130