PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/30-07:12:40
G08     312.9          17.4                5.4 +/-    0.78      12.6 +/-    0.78  0.040 / 0.050
G10     326.8          59.3                6.3 +/-    0.83       7.2 +/-    0.83  0.040 / 0.060
G14     215.7          27.7                6.6 +/-    2.23      12.1 +/-    2.23  0.050 / 0.080
G15     46.3           12.4                2.3 +/-    1.92       6.0 +/-    1.92  0.090 / 0.090
G20     30.4           61.7                5.3 +/-    0.57       5.9 +/-    0.57  0.040 / 0.040
G21     130.2          59.4                6.7 +/-    0.78       7.7 +/-    0.78  0.030 / 0.040
G24     77.6           29.7                5.9 +/-    1.00      10.4 +/-    1.00  0.100 / 0.230
G27     281.9          37.4                8.5 +/-    1.05      12.9 +/-    1.05  0.110 / 0.230
G32     219.9          43.9                9.6 +/-    1.43      13.1 +/-    1.43  0.100 / 0.200