PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/19-08:58:00
G07     46.6           69.5                6.2 +/-    0.36       6.6 +/-    0.36  0.030 / 0.030
G08     51.4           39.9                4.6 +/-    0.89       6.6 +/-    0.89  0.030 / 0.030
G09     174.6          34.3                6.6 +/-    1.00      10.5 +/-    1.00  0.060 / 0.370
G11     119.7          34.0                8.5 +/-    0.78      13.8 +/-    0.78  0.120 / 0.260
G17     199.0          13.7                3.8 +/-    3.65       9.8 +/-    3.65  0.030 / 0.030
G18     104.9          15.3                5.9 +/-    1.58      14.5 +/-    1.58  0.040 / 0.040
G23     161.0          11.0                3.9 +/-    1.41      10.6 +/-    1.41  0.220 / 0.350
G27     37.8           10.3                2.9 +/-    3.35       8.2 +/-    3.35  0.190 / 0.320
G28     271.1          50.7                6.0 +/-    2.73       7.5 +/-    2.73  0.110 / 0.280
G30     328.0          57.0                4.3 +/-    0.55       5.0 +/-    0.55  0.140 / 0.250