PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/20-12:28:10
G02     206.1          39.9                5.5 +/-    1.88       8.1 +/-    1.88  0.070 / 0.100
G06     138.9          75.8                6.0 +/-    0.51       6.2 +/-    0.51  0.060 / 0.080
G12     310.7          21.4                3.7 +/-    3.17       7.8 +/-    3.17  0.030 / 0.050
G17     40.2           45.8                2.5 +/-    0.67       3.4 +/-    0.67  0.030 / 0.060
G19     17.5           59.9                4.6 +/-    1.10       5.3 +/-    1.10  0.140 / 0.230
G24     290.9          39.8                3.0 +/-    1.23       4.4 +/-    1.23  0.070 / 0.190
G28     105.4          33.0                4.7 +/-    0.77       7.7 +/-    0.77  0.040 / 0.040