PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/28-02:42:40
G07     14.6           67.8                2.8 +/-    0.50       3.0 +/-    0.50  0.070 / 0.080
G08     64.4           48.6                3.7 +/-    1.15       4.8 +/-    1.15  0.070 / 0.100
G09     180.7          51.2                7.5 +/-    0.82       9.3 +/-    0.82  0.040 / 0.040
G11     131.7          26.2                6.8 +/-    2.13      13.0 +/-    2.13  0.050 / 0.040
G23     160.2          20.7                7.2 +/-    2.03      15.5 +/-    2.03  0.040 / 0.030
G27     40.5           16.9                2.6 +/-    2.04       6.2 +/-    2.04  0.030 / 0.030
G28     258.7          45.6                3.9 +/-    2.43       5.2 +/-    2.43  0.280 / 0.120
G30     321.7          51.8                2.9 +/-    0.56       3.5 +/-    0.56  0.100 / 0.130