PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/28-14:27:40
G01     47.8           23.6                5.8 +/-    1.21      11.8 +/-    1.21  0.030 / 0.060
G06     176.5          26.8                9.4 +/-    1.29      17.6 +/-    1.29  0.040 / 0.040
G11     44.2           14.2                4.6 +/-    1.72      11.7 +/-    1.72  0.030 / 0.030
G13     247.3          30.1                7.3 +/-    0.89      12.8 +/-    0.89  0.030 / 0.020
G15     282.0          15.3                6.0 +/-    3.10      14.8 +/-    3.10  0.040 / 0.050
G17     304.0          77.9                7.3 +/-    0.52       7.5 +/-    0.52  0.040 / 0.040
G19     249.7          62.9                7.8 +/-    0.58       8.6 +/-    0.58  0.200 / 0.410
G28     46.3           56.1                7.1 +/-    0.64       8.3 +/-    0.64  0.130 / 0.480
G30     150.4          39.0                8.2 +/-    0.94      12.2 +/-    0.94  0.110 / 0.140