PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/12-19:42:40
G01     319.4          16.7               10.1 +/-    2.06      24.1 +/-    2.06  0.050 / 0.060
G08     258.7          13.8                9.8 +/-    4.85      25.0 +/-    4.85  0.050 / 0.070
G10     76.9           54.6               10.2 +/-    0.88      12.2 +/-    0.88  0.070 / 0.040
G11     304.8          22.1               10.6 +/-    2.47      22.1 +/-    2.47  0.070 / 0.040
G14     293.3          70.4                9.5 +/-    0.41      10.1 +/-    0.41  0.150 / 0.200
G18     101.3          28.5               11.4 +/-    1.23      20.7 +/-    1.23  0.130 / 0.240
G31     178.0          38.9               12.8 +/-    0.95      18.9 +/-    0.95  0.030 / 0.020
G32     1.9            68.9               10.1 +/-    0.41      10.8 +/-    0.41  0.030 / 0.020