PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/04-10:57:50
G08     291.5          21.1                7.1 +/-    1.94      15.3 +/-    1.94  0.080 / 0.070
G10     21.0           63.1                4.1 +/-    0.81       4.5 +/-    0.81  0.060 / 0.080
G14     235.6          48.9                8.7 +/-    1.80      11.2 +/-    1.80  0.080 / 0.110
G18     317.7          14.3                3.5 +/-    1.72       8.9 +/-    1.72  0.090 / 0.100
G21     149.2          33.4                6.4 +/-    1.46      10.4 +/-    1.46  0.040 / 0.030
G24     50.8           22.6                3.5 +/-    0.85       7.2 +/-    0.85  0.040 / 0.030
G27     247.1          27.9                6.4 +/-    1.32      11.7 +/-    1.32  0.050 / 0.110
G31     181.4          13.3                5.9 +/-    1.59      15.3 +/-    1.59  0.060 / 0.110
G32     265.2          73.7                5.5 +/-    0.80       5.7 +/-    0.80  0.170 / 0.400