PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/27-14:28:00
G01     108.6          24.4                9.4 +/-    0.88      18.6 +/-    0.88  0.150 / 0.210
G07     105.8          56.2               10.2 +/-    0.59      12.0 +/-    0.59  0.160 / 0.250
G08     41.9           20.2                7.5 +/-    2.68      16.5 +/-    2.68  0.030 / 0.020
G09     174.1          14.1                7.6 +/-    2.87      19.4 +/-    2.87  0.030 / 0.020
G11     88.7           40.5               10.5 +/-    1.04      15.1 +/-    1.04  0.030 / 0.030
G13     312.4          25.7                6.4 +/-    1.23      12.2 +/-    1.23  0.030 / 0.040
G17     204.4          38.3               10.5 +/-    0.85      15.7 +/-    0.85  0.100 / 0.210
G19     208.3          12.8                6.1 +/-    2.41      15.9 +/-    2.41  0.130 / 0.190
G28     314.1          60.4                8.7 +/-    0.50       9.8 +/-    0.50  0.080 / 0.080
G30     5.7            75.5                9.5 +/-    0.61       9.7 +/-    0.61  0.070 / 0.050