PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/23-02:58:10
G07     9.7            67.1                2.6 +/-    0.88       2.8 +/-    0.88  0.110 / 0.080
G08     67.1           49.5                4.1 +/-    0.86       5.2 +/-    0.86  0.140 / 0.090
G09     181.1          53.4                5.6 +/-    0.76       6.8 +/-    0.76  0.040 / 0.040
G11     133.1          24.9                7.4 +/-    1.51      14.5 +/-    1.51  0.040 / 0.040
G23     160.0          22.8                6.6 +/-    3.02      13.6 +/-    3.02  0.160 / 0.130
G27     41.3           18.4                3.0 +/-    1.81       7.0 +/-    1.81  0.190 / 0.120
G28     256.3          44.3                3.5 +/-    4.00       4.7 +/-    4.00  0.050 / 0.030
G30     319.6          50.1                3.0 +/-    0.34       3.8 +/-    0.34  0.040 / 0.030