PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/07-03:57:50
G07     3.4            66.0                3.0 +/-    0.98       3.2 +/-    0.98  0.050 / 0.170
G08     70.9           50.4                3.3 +/-    0.43       4.2 +/-    0.43  0.090 / 0.210
G09     181.4          56.4                6.9 +/-    0.80       8.1 +/-    0.80  0.040 / 0.040
G11     134.9          23.0                6.1 +/-    1.71      12.4 +/-    1.71  0.040 / 0.050
G23     159.7          26.1                5.7 +/-    1.41      10.9 +/-    1.41  0.160 / 0.360
G27     42.7           20.6                1.9 +/-    2.79       4.1 +/-    2.79  0.080 / 0.180
G28     252.9          42.3                5.8 +/-    2.22       8.2 +/-    2.22  0.030 / 0.030
G30     316.3          47.3                4.1 +/-    0.72       5.3 +/-    0.72  0.030 / 0.030