PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/13-06:58:10
G08     297.0          22.7                4.7 +/-    1.39       9.8 +/-    1.39  0.090 / 0.110
G10     3.5            62.7                4.6 +/-    0.48       5.1 +/-    0.48  0.090 / 0.130
G14     226.7          44.2                7.7 +/-    1.26      10.5 +/-    1.26  0.050 / 0.090
G20     61.1           53.8                5.3 +/-    0.46       6.4 +/-    0.46  0.040 / 0.090
G21     144.9          42.6                7.3 +/-    1.06      10.2 +/-    1.06  0.050 / 0.090
G24     58.5           26.3                4.8 +/-    1.08       9.0 +/-    1.08  0.070 / 0.120
G27     259.3          33.4                4.7 +/-    1.07       7.6 +/-    1.07  0.030 / 0.040
G32     237.7          61.2                6.4 +/-    0.75       7.2 +/-    0.75  0.030 / 0.040