PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/10/18-01:27:50
G03     259.5          70.0                3.8 +/-    0.34       4.0 +/-    0.34  0.030 / 0.050
G09     300.7          16.3                2.0 +/-    1.99       4.8 +/-    1.99  0.040 / 0.040
G14     93.5           20.9                3.1 +/-    1.23       6.6 +/-    1.23  0.130 / 0.280
G16     131.7          54.4                5.1 +/-    0.65       6.1 +/-    0.65  0.150 / 0.280
G22     204.0          61.8                5.5 +/-    0.78       6.1 +/-    0.78  0.150 / 0.330
G23     315.6          45.6                5.9 +/-    0.98       7.9 +/-    0.98  0.140 / 0.270
G26     77.6           53.2                2.4 +/-    0.74       2.9 +/-    0.74  0.040 / 0.030
G31     50.1           22.6                2.1 +/-    2.82       4.3 +/-    2.82  0.040 / 0.040