PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/10/15-09:27:50
G01     40.6           15.9                2.0 +/-    2.94       4.9 +/-    2.94  0.070 / 0.090
G06     173.6          38.2                4.8 +/-    0.99       7.2 +/-    0.99  0.090 / 0.100
G13     237.3          23.5                6.7 +/-    1.84      13.6 +/-    1.84  0.040 / 0.040
G15     271.2          12.6                4.8 +/-    1.44      12.6 +/-    1.44  0.040 / 0.040
G17     356.2          72.3                3.9 +/-    0.42       4.1 +/-    0.42  0.140 / 0.230
G19     276.5          70.4                2.8 +/-    1.22       2.9 +/-    1.22  0.250 / 0.280
G24     317.2          16.7                2.3 +/-    1.90       5.4 +/-    1.90  0.040 / 0.070
G28     61.1           53.1                3.8 +/-    0.67       4.6 +/-    0.67  0.040 / 0.050
G30     155.1          31.3                5.8 +/-    0.99       9.8 +/-    0.99  0.160 / 0.250