PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/13-11:42:50
G10     295.3          51.5                4.7 +/-    2.12       5.9 +/-    2.12  0.080 / 0.060
G14     209.3          10.7               -7.3 +/-    4.78     -19.9 +/-    4.78  0.100 / 0.050
G15     46.4           29.4                3.4 +/-    1.30       6.0 +/-    1.30  0.070 / 0.110
G20     348.4          65.4                4.8 +/-    0.46       5.2 +/-    0.46  0.080 / 0.120
G21     99.6           70.6                6.2 +/-    0.72       6.6 +/-    0.72  0.030 / 0.030
G24     96.8           25.5                6.7 +/-    0.93      13.0 +/-    0.93  0.030 / 0.030
G27     304.7          31.7                4.2 +/-    1.08       7.1 +/-    1.08  0.090 / 0.110
G32     210.2          27.2                4.0 +/-    1.07       7.5 +/-    1.07  0.070 / 0.120