PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/20-10:27:50
G01     54.9           27.9                2.9 +/-    0.65       5.2 +/-    0.65  0.050 / 0.040
G06     178.0          18.8              -25.2 +/-   12.25     -57.0 +/-   12.25  0.050 / 0.040
G07     143.3          17.3                4.3 +/-    2.75      10.2 +/-    2.75  0.060 / 0.190
G11     46.9           22.5                2.8 +/-    0.91       5.9 +/-    0.91  0.070 / 0.170
G13     256.6          34.7                5.9 +/-    1.52       9.5 +/-    1.52  0.020 / 0.030
G15     290.6          16.1                3.7 +/-    2.41       8.9 +/-    2.41  0.030 / 0.040
G17     267.1          77.0                5.5 +/-    0.76       5.6 +/-    0.76  0.060 / 0.140
G19     236.4          56.2                5.2 +/-    1.05       6.2 +/-    1.05  0.070 / 0.140
G28     29.6           59.1                4.0 +/-    0.68       4.6 +/-    0.68  0.040 / 0.050
G30     146.7          50.3                6.2 +/-    0.93       7.8 +/-    0.93  0.040 / 0.060