PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/23-07:12:40
G10     304.3          54.4                4.3 +/-    1.17       5.1 +/-    1.17  0.030 / 0.030
G14     210.8          15.7                3.8 +/-    1.76       9.4 +/-    1.76  0.030 / 0.040
G15     45.6           23.5                2.6 +/-    2.46       5.3 +/-    2.46  0.070 / 0.090
G20     2.0            64.9                3.9 +/-    0.89       4.2 +/-    0.89  0.090 / 0.080
G21     108.9          70.0                6.1 +/-    0.51       6.4 +/-    0.51  0.070 / 0.040
G24     92.5           27.6                5.7 +/-    1.60      10.5 +/-    1.60  0.060 / 0.040
G27     298.0          34.9                5.4 +/-    2.09       8.6 +/-    2.09  0.080 / 0.110
G32     212.8          31.0                4.4 +/-    1.82       7.5 +/-    1.82  0.080 / 0.110