PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/06-04:12:30
G07     15.6           67.8                4.9 +/-    0.83       5.3 +/-    0.83  0.080 / 0.120
G08     63.8           48.1                4.4 +/-    1.25       5.6 +/-    1.25  0.110 / 0.120
G09     180.3          50.9                8.2 +/-    0.92      10.3 +/-    0.92  0.050 / 0.040
G11     130.9          26.3                7.4 +/-    2.71      14.0 +/-    2.71  0.060 / 0.040
G23     160.3          21.1                5.8 +/-    1.17      12.4 +/-    1.17  0.030 / 0.040
G27     40.4           16.8                3.5 +/-    1.80       8.3 +/-    1.80  0.040 / 0.050
G28     258.7          45.6                4.4 +/-    2.58       5.8 +/-    2.58  0.030 / 0.030
G30     320.9          51.0                4.4 +/-    0.67       5.4 +/-    0.67  0.030 / 0.030