PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/18-08:58:10
G07     42.3           69.5                5.2 +/-    0.98       5.5 +/-    0.98  0.040 / 0.030
G08     52.6           41.0                3.4 +/-    1.13       4.8 +/-    1.13  0.020 / 0.030
G09     174.7          35.9                6.0 +/-    0.59       9.3 +/-    0.59  0.340 / 0.200
G11     121.1          33.2                6.1 +/-    1.15      10.0 +/-    1.15  0.220 / 0.260
G17     198.9          12.3                0.4 +/-   11.33       1.1 +/-   11.33  0.030 / 0.030
G18     106.1          14.6                4.9 +/-    1.67      12.2 +/-    1.67  0.030 / 0.030
G23     161.0          12.2                3.8 +/-    1.03      10.1 +/-    1.03  0.140 / 0.200
G27     38.1           11.4                2.8 +/-    2.50       7.6 +/-    2.50  0.210 / 0.220
G28     269.1          49.9                5.3 +/-    2.96       6.7 +/-    2.96  0.170 / 0.330
G30     326.6          55.9                3.8 +/-    0.65       4.5 +/-    0.65  0.200 / 0.270