PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/09-13:27:50
G01     111.7          22.7                6.6 +/-    1.49      13.5 +/-    1.49  0.150 / 0.370
G07     100.6          58.8                7.6 +/-    0.66       8.7 +/-    0.66  0.160 / 0.380
G08     42.4           22.8                5.3 +/-    2.14      10.8 +/-    2.14  0.030 / 0.030
G09     174.2          16.5                6.2 +/-    0.84      14.8 +/-    0.84  0.040 / 0.030
G11     93.2           40.3                5.7 +/-    0.70       8.2 +/-    0.70  0.070 / 0.200
G13     314.5          23.5                4.7 +/-    1.42       9.4 +/-    1.42  0.120 / 0.190
G17     203.2          35.1                8.1 +/-    1.43      12.9 +/-    1.43  0.030 / 0.020
G28     308.1          59.8                5.2 +/-    0.86       5.9 +/-    0.86  0.030 / 0.020
G30     357.8          73.2                6.3 +/-    1.13       6.6 +/-    1.13  0.080 / 0.130