PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/13-04:12:40
G01     103.9          26.9                6.8 +/-    1.07      12.7 +/-    1.07  0.040 / 0.040
G07     112.6          53.6                6.7 +/-    0.55       8.1 +/-    0.55  0.030 / 0.040
G08     41.4           15.3                2.7 +/-    2.16       6.6 +/-    2.16  0.050 / 0.050
G11     82.2           42.3                6.1 +/-    1.04       8.6 +/-    1.04  0.050 / 0.050
G13     306.8          31.0                5.1 +/-    1.39       8.8 +/-    1.39  0.030 / 0.020
G17     206.0          43.7                7.1 +/-    0.93       9.8 +/-    0.93  0.030 / 0.020
G19     210.0          13.8               -0.9 +/-    6.09      -2.3 +/-    6.09  0.080 / 0.110
G28     319.6          60.8                4.9 +/-    0.58       5.5 +/-    0.58  0.070 / 0.100
G30     30.4           79.4                6.3 +/-    0.71       6.3 +/-    0.71  0.080 / 0.140