PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/30-11:57:50
G01     85.8           32.6                2.6 +/-    2.26       4.4 +/-    2.26  0.030 / 0.020
G07     128.7          42.0                5.6 +/-    0.61       7.9 +/-    0.61  0.030 / 0.020
G11     63.1           37.0                4.3 +/-    0.78       6.5 +/-    0.78  0.050 / 0.050
G13     289.9          37.3                4.9 +/-    3.40       7.4 +/-    3.40  0.050 / 0.060
G17     217.0          59.5                5.8 +/-    0.95       6.6 +/-    0.95  0.080 / 0.090
G18     59.4           22.6                3.6 +/-    2.27       7.5 +/-    2.27  0.080 / 0.090
G19     216.5          26.8                4.0 +/-    2.37       7.4 +/-    2.37  0.050 / 0.120
G28     355.7          61.5                4.2 +/-    0.60       4.7 +/-    0.60  0.050 / 0.110
G30     112.5          75.4                5.3 +/-    1.03       5.4 +/-    1.03  0.080 / 0.210