PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/15-12:42:30
G10     300.3          52.5                3.4 +/-    1.83       4.2 +/-    1.83  0.070 / 0.060
G14     211.2          12.7                2.1 +/-    5.96       5.5 +/-    5.96  0.070 / 0.080
G15     45.6           24.7                4.4 +/-    1.92       8.6 +/-    1.92  0.090 / 0.240
G20     71.1           21.3                2.6 +/-    2.10       5.6 +/-    2.10  0.090 / 0.200
G21     106.7          70.4                3.9 +/-    0.52       4.1 +/-    0.52  0.120 / 0.320
G24     95.8           27.4                3.3 +/-    2.39       6.1 +/-    2.39  0.180 / 0.390
G27     296.7          35.7                4.7 +/-    2.67       7.4 +/-    2.67  0.030 / 0.030
G32     211.7          35.0                4.8 +/-    1.42       7.6 +/-    1.42  0.030 / 0.040