PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/20-07:28:00
G01     220.4          12.3                3.9 +/-    1.82      10.3 +/-    1.82  0.070 / 0.060
G03     266.2          70.8                5.4 +/-    0.78       5.7 +/-    0.78  0.060 / 0.060
G09     297.5          11.1               -8.8 +/-   24.84     -24.1 +/-   24.84  0.110 / 0.290
G14     91.5           20.8                3.2 +/-    1.81       6.9 +/-    1.81  0.110 / 0.240
G16     139.5          50.7                6.1 +/-    0.56       7.7 +/-    0.56  0.040 / 0.040
G22     205.4          64.6                6.0 +/-    0.34       6.6 +/-    0.34  0.050 / 0.040
G23     315.6          46.3                5.8 +/-    0.55       7.7 +/-    0.55  0.220 / 0.310
G26     85.2           54.3                5.4 +/-    0.63       6.5 +/-    0.63  0.160 / 0.290
G31     48.5           25.3                3.0 +/-    2.17       5.8 +/-    2.17  0.050 / 0.040