PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/23-21:13:00
G01     70.4           32.9               13.0 +/-    0.60      21.4 +/-    0.60  0.120 / 0.350
G07     137.7          31.2               15.6 +/-    1.25      26.7 +/-    1.25  0.120 / 0.360
G11     54.4           31.8               10.9 +/-    0.74      18.5 +/-    0.74  0.040 / 0.080
G13     274.4          37.4               15.6 +/-    0.75      23.8 +/-    0.75  0.040 / 0.080
G15     302.3          15.4                8.7 +/-    2.20      21.3 +/-    2.20  0.070 / 0.110
G17     232.3          64.6               18.3 +/-    1.26      20.1 +/-    1.26  0.070 / 0.100
G18     49.2           18.4               10.2 +/-    0.86      23.3 +/-    0.86  0.050 / 0.140
G19     224.5          41.4               18.3 +/-    1.46      26.1 +/-    1.46  0.050 / 0.130
G28     20.8           59.1               13.5 +/-    0.32      15.5 +/-    0.32  0.040 / 0.060
G30     135.7          59.8               16.7 +/-    0.76      19.0 +/-    0.76  0.030 / 0.050