PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/27-15:57:40
G01     61.4           30.7                9.4 +/-    1.05      16.2 +/-    1.05  0.040 / 0.040
G06     180.3          14.1               10.7 +/-    3.74      27.2 +/-    3.74  0.040 / 0.030
G07     141.3          20.2                8.6 +/-    2.02      18.8 +/-    2.02  0.100 / 0.190
G11     48.0           21.9                8.1 +/-    2.14      17.0 +/-    2.14  0.130 / 0.230
G13     266.5          35.3               10.0 +/-    0.89      15.7 +/-    0.89  0.080 / 0.090
G17     260.7          77.9               10.0 +/-    0.53      10.2 +/-    0.53  0.120 / 0.110
G19     231.8          51.7               11.4 +/-    2.05      14.1 +/-    2.05  0.020 / 0.020
G28     33.6           57.0               10.1 +/-    1.18      11.8 +/-    1.18  0.030 / 0.020
G30     142.3          56.2               10.1 +/-    0.75      11.9 +/-    0.75  0.040 / 0.070