PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-07:27:40
G10     303.3          54.1                3.8 +/-    1.24       4.6 +/-    1.24  0.030 / 0.040
G14     210.6          15.1                4.3 +/-    3.17      10.6 +/-    3.17  0.030 / 0.040
G15     45.6           24.1                3.4 +/-    2.39       6.8 +/-    2.39  0.060 / 0.040
G20     0.6            65.0                3.0 +/-    0.67       3.2 +/-    0.67  0.060 / 0.040
G21     107.6          70.3                5.4 +/-    0.66       5.7 +/-    0.66  0.240 / 0.420
G24     93.1           27.4                4.2 +/-    2.04       7.7 +/-    2.04  0.130 / 0.330
G27     298.7          34.6                4.7 +/-    2.68       7.6 +/-    2.68  0.160 / 0.210
G32     212.5          30.2                5.6 +/-    2.96       9.8 +/-    2.96  0.120 / 0.160