PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/30-09:42:50
G10     297.8          51.8                3.6 +/-    2.14       4.5 +/-    2.14  0.110 / 0.070
G15     45.9           26.7                1.8 +/-    2.09       3.5 +/-    2.09  0.080 / 0.080
G20     63.4           34.2                3.3 +/-    1.40       5.4 +/-    1.40  0.060 / 0.140
G21     99.5           73.1                3.8 +/-    1.05       4.0 +/-    1.05  0.060 / 0.140
G24     97.3           26.7                4.3 +/-    2.14       8.1 +/-    2.14  0.040 / 0.040
G27     299.0          34.9                5.3 +/-    1.42       8.5 +/-    1.42  0.040 / 0.030
G32     210.7          33.9                5.1 +/-    1.90       8.2 +/-    1.90  0.060 / 0.090