PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/15-08:12:40
G08     313.1          17.3                4.9 +/-    2.78      11.6 +/-    2.78  0.040 / 0.040
G10     325.4          59.1                5.0 +/-    0.97       5.7 +/-    0.97  0.030 / 0.040
G14     215.4          27.2                6.2 +/-    2.46      11.5 +/-    2.46  0.130 / 0.200
G15     46.2           13.0                2.8 +/-    2.01       7.2 +/-    2.01  0.130 / 0.180
G20     29.2           61.9                5.4 +/-    1.76       6.0 +/-    1.76  0.060 / 0.060
G21     129.5          59.3                8.6 +/-    0.33       9.9 +/-    0.33  0.070 / 0.060
G24     78.0           29.6                6.5 +/-    0.96      11.5 +/-    0.96  0.030 / 0.030
G27     282.9          37.3                5.9 +/-    1.40       9.0 +/-    1.40  0.030 / 0.030
G32     219.6          42.0                8.2 +/-    1.67      11.5 +/-    1.67  0.070 / 0.080