PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/04-08:58:00
G01     319.7          17.0                2.1 +/-    1.57       4.9 +/-    1.57  0.130 / 0.320
G08     259.3          14.4                5.0 +/-    1.70      12.5 +/-    1.70  0.150 / 0.320
G10     77.4           53.1                4.2 +/-    0.37       5.1 +/-    0.37  0.040 / 0.040
G11     304.3          22.5                1.8 +/-    1.05       3.6 +/-    1.05  0.040 / 0.040
G14     291.6          70.8                4.8 +/-    0.51       5.1 +/-    0.51  0.120 / 0.230
G18     305.5          40.6                4.7 +/-    1.13       6.7 +/-    1.13  0.090 / 0.210
G20     103.8          30.3                6.1 +/-    1.00      10.5 +/-    1.00  0.050 / 0.050
G27     226.6          10.6                3.6 +/-    3.36      10.0 +/-    3.36  0.050 / 0.050
G31     176.6          39.4                6.3 +/-    0.94       9.2 +/-    0.94  0.120 / 0.260
G32     350.8          71.0                4.8 +/-    0.43       5.1 +/-    0.43  0.130 / 0.250