PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/19-18:43:00
G01     94.8           30.7               16.1 +/-    0.51      27.8 +/-    0.51  0.030 / 0.060
G07     121.6          49.4               17.4 +/-    0.61      22.1 +/-    0.61  0.030 / 0.050
G08     42.1           12.7                9.8 +/-    0.85      25.9 +/-    0.85  0.080 / 0.180
G11     74.4           41.7               16.0 +/-    0.92      22.6 +/-    0.92  0.100 / 0.170
G13     299.1          34.5               14.8 +/-    1.08      23.7 +/-    1.08  0.040 / 0.060
G17     212.5          46.5               18.2 +/-    1.06      24.0 +/-    1.06  0.040 / 0.050
G18     68.2           24.6               13.6 +/-    0.60      26.8 +/-    0.60  0.040 / 0.080
G19     213.1          22.1               16.7 +/-    2.97      35.1 +/-    2.97  0.040 / 0.090
G28     341.7          61.9               13.6 +/-    0.62      15.2 +/-    0.62  0.030 / 0.040
G30     90.3           77.8               16.9 +/-    0.54      17.3 +/-    0.54  0.030 / 0.040