PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/15-12:12:40
G07     45.6           68.5                4.8 +/-    0.39       5.2 +/-    0.39  0.040 / 0.050
G08     53.6           41.5                3.7 +/-    0.68       5.3 +/-    0.68  0.040 / 0.050
G09     176.5          39.2                8.7 +/-    0.69      12.9 +/-    0.69  0.030 / 0.030
G11     120.6          31.4                3.8 +/-    1.13       6.5 +/-    1.13  0.030 / 0.030
G17     198.7          12.4                2.0 +/-    3.46       5.2 +/-    3.46  0.120 / 0.280
G23     161.1          13.8                5.3 +/-    1.06      13.6 +/-    1.06  0.100 / 0.290
G27     37.8           10.2                3.9 +/-    1.43      10.9 +/-    1.43  0.090 / 0.220
G28     269.3          50.2                5.5 +/-    1.34       7.0 +/-    1.34  0.050 / 0.280
G30     325.5          54.5                3.7 +/-    0.82       4.4 +/-    0.82  0.200 / 0.360