PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/15-08:27:50
G08     307.4          20.2                2.9 +/-    1.32       6.3 +/-    1.32  0.040 / 0.040
G10     338.6          61.0                4.2 +/-    0.45       4.7 +/-    0.45  0.040 / 0.050
G14     218.8          33.6                7.4 +/-    1.51      12.1 +/-    1.51  0.090 / 0.150
G20     42.2           59.3                5.7 +/-    0.90       6.6 +/-    0.90  0.140 / 0.190
G21     136.4          52.9                8.9 +/-    0.53      10.8 +/-    0.53  0.120 / 0.050
G24     70.2           29.2                5.3 +/-    1.53       9.4 +/-    1.53  0.100 / 0.080
G27     274.1          36.9                7.4 +/-    2.25      11.4 +/-    2.25  0.030 / 0.020
G32     224.7          48.5                7.6 +/-    1.89       9.7 +/-    1.89  0.030 / 0.020