PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/14-10:27:50
G01     67.0           31.7                3.2 +/-    1.34       5.3 +/-    1.34  0.070 / 0.100
G07     138.1          27.5                5.8 +/-    0.96      10.8 +/-    0.96  0.070 / 0.130
G11     52.7           31.1                2.9 +/-    1.31       5.0 +/-    1.31  0.040 / 0.040
G13     270.6          38.3                4.4 +/-    2.84       6.5 +/-    2.84  0.040 / 0.040
G15     301.4          15.2                1.3 +/-    1.65       3.1 +/-    1.65  0.100 / 0.110
G17     233.9          68.4                5.7 +/-    0.61       6.0 +/-    0.61  0.130 / 0.120
G18     46.8           17.0                3.3 +/-    2.08       7.9 +/-    2.08  0.100 / 0.280
G19     224.7          45.8                5.0 +/-    2.46       6.7 +/-    2.46  0.060 / 0.220
G28     8.6            61.0                3.3 +/-    1.36       3.7 +/-    1.36  0.040 / 0.040
G30     137.9          61.6                5.7 +/-    0.36       6.3 +/-    0.36  0.040 / 0.030