PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/23-15:28:10
G01     86.0           32.3                8.4 +/-    1.39      14.0 +/-    1.39  0.050 / 0.050
G07     128.5          39.0               10.9 +/-    1.25      16.1 +/-    1.25  0.040 / 0.060
G11     63.3           35.5               10.0 +/-    1.17      15.8 +/-    1.17  0.090 / 0.110
G13     292.8          35.7               12.1 +/-    2.07      19.0 +/-    2.07  0.080 / 0.090
G17     216.8          59.4               10.6 +/-    0.98      12.1 +/-    0.98  0.030 / 0.030
G19     216.0          31.9                9.7 +/-    1.29      16.3 +/-    1.29  0.020 / 0.030
G28     355.4          61.3               10.5 +/-    0.68      11.8 +/-    0.68  0.040 / 0.040
G30     108.0          76.0               12.0 +/-    0.76      12.4 +/-    0.76  0.050 / 0.040