PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/31-02:12:40
G01     92.5           31.3                4.3 +/-    0.44       7.3 +/-    0.44  0.030 / 0.050
G07     123.5          47.4                4.4 +/-    0.89       5.7 +/-    0.89  0.040 / 0.050
G08     42.3           10.5                2.5 +/-    2.79       7.0 +/-    2.79  0.040 / 0.060
G11     73.5           41.6                4.0 +/-    0.67       5.7 +/-    0.67  0.040 / 0.050
G13     297.7          34.7                4.4 +/-    1.07       7.0 +/-    1.07  0.030 / 0.040
G17     213.4          50.8                8.3 +/-    1.32      10.4 +/-    1.32  0.040 / 0.050
G19     213.7          25.8                7.6 +/-    1.32      14.6 +/-    1.32  0.070 / 0.120
G28     346.7          61.8                2.6 +/-    0.57       2.9 +/-    0.57  0.080 / 0.110
G30     104.1          73.6                4.2 +/-    0.55       4.4 +/-    0.55  0.050 / 0.080