PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/30-06:43:10
G10     304.1          54.3                5.6 +/-    1.14       6.7 +/-    1.14  0.030 / 0.040
G14     210.7          15.5                8.3 +/-    2.19      20.3 +/-    2.19  0.030 / 0.050
G15     45.6           23.7                2.7 +/-    0.72       5.5 +/-    0.72  0.070 / 0.100
G20     1.6            64.9                4.4 +/-    1.23       4.8 +/-    1.23  0.060 / 0.090
G21     108.2          70.4                6.4 +/-    0.84       6.7 +/-    0.84  0.040 / 0.040
G24     92.8           27.6                6.7 +/-    2.11      12.3 +/-    2.11  0.040 / 0.040
G27     298.1          34.9                5.9 +/-    0.94       9.4 +/-    0.94  0.190 / 0.520
G32     212.6          31.2                6.3 +/-    1.84      10.7 +/-    1.84  0.190 / 0.440