PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/12-04:58:00
G01     111.6          23.0                7.1 +/-    1.85      14.6 +/-    1.85  0.050 / 0.040
G07     99.1           61.1                6.2 +/-    0.37       6.9 +/-    0.37  0.030 / 0.040
G08     42.6           24.1                3.5 +/-    2.00       7.0 +/-    2.00  0.100 / 0.090
G09     176.0          18.4                6.5 +/-    3.87      14.9 +/-    3.87  0.070 / 0.090
G11     96.3           41.8                7.0 +/-    0.69       9.9 +/-    0.69  0.080 / 0.110
G13     313.8          24.3                2.0 +/-    1.05       4.0 +/-    1.05  0.090 / 0.110
G17     203.9          34.0                6.9 +/-    1.46      11.2 +/-    1.46  0.120 / 0.150
G28     310.0          60.2                2.8 +/-    1.30       3.2 +/-    1.30  0.110 / 0.130
G30     12.2           75.6                5.0 +/-    0.72       5.1 +/-    0.72  0.030 / 0.030