PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/28-14:27:40
G01     106.8          25.4                9.9 +/-    2.02      19.1 +/-    2.02  0.020 / 0.020
G07     108.5          54.8               10.3 +/-    1.13      12.3 +/-    1.13  0.020 / 0.030
G08     41.8           18.6                7.3 +/-    1.47      16.6 +/-    1.47  0.030 / 0.060
G09     173.7          12.4               10.8 +/-    1.92      28.7 +/-    1.92  0.030 / 0.060
G11     86.2           40.5                9.6 +/-    0.88      13.8 +/-    0.88  0.050 / 0.080
G13     311.1          26.9                8.2 +/-    1.46      15.3 +/-    1.46  0.090 / 0.080
G17     205.1          40.2               12.6 +/-    1.10      18.3 +/-    1.10  0.080 / 0.200
G19     208.8          14.5                9.7 +/-    2.59      24.3 +/-    2.59  0.080 / 0.250
G28     317.8          60.8                8.3 +/-    1.46       9.4 +/-    1.46  0.080 / 0.160
G30     12.0           76.8                8.3 +/-    0.78       8.5 +/-    0.78  0.080 / 0.130