PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/10/18-08:42:40
G01     50.7           25.5                4.6 +/-    1.07       8.8 +/-    1.07  0.040 / 0.060
G06     176.9          23.0                4.3 +/-    1.64       8.8 +/-    1.64  0.050 / 0.070
G07     145.0          14.0                3.9 +/-    1.40       9.9 +/-    1.40  0.110 / 0.310
G11     45.7           19.7                2.0 +/-    0.98       4.3 +/-    0.98  0.150 / 0.410
G13     251.5          32.6                5.3 +/-    1.53       8.9 +/-    1.53  0.110 / 0.240
G15     285.0          16.2                4.4 +/-    2.38      10.7 +/-    2.38  0.100 / 0.230
G17     294.7          79.1                5.6 +/-    0.92       5.7 +/-    0.92  0.070 / 0.180
G19     242.7          60.2                8.3 +/-    0.81       9.5 +/-    0.81  0.070 / 0.160
G28     36.5           58.2                3.3 +/-    0.48       3.9 +/-    0.48  0.040 / 0.050
G30     149.4          46.7                6.6 +/-    0.68       8.7 +/-    0.68  0.040 / 0.050