PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/08-14:58:00
G01     105.0          26.6               11.0 +/-    0.71      20.8 +/-    0.71  0.020 / 0.040
G07     109.9          56.8               11.1 +/-    0.60      13.0 +/-    0.60  0.020 / 0.030
G08     41.7           18.5                7.1 +/-    0.71      16.2 +/-    0.71  0.070 / 0.130
G09     173.6          10.7               10.2 +/-    1.86      28.0 +/-    1.86  0.080 / 0.120
G11     85.7           42.7               10.5 +/-    0.82      14.6 +/-    0.82  0.040 / 0.050
G13     307.9          30.0               10.3 +/-    1.26      18.0 +/-    1.26  0.030 / 0.060
G17     206.8          39.4               11.9 +/-    1.39      17.5 +/-    1.39  0.040 / 0.040
G18     77.9           24.5                8.9 +/-    1.08      17.7 +/-    1.08  0.030 / 0.050
G28     321.9          61.3                9.7 +/-    0.81      10.9 +/-    0.81  0.040 / 0.080
G30     30.2           79.0               10.9 +/-    0.48      11.0 +/-    0.48  0.040 / 0.080