PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/21-04:28:00
G01     46.3           22.3                4.4 +/-    2.55       9.2 +/-    2.55  0.040 / 0.050
G06     179.3          27.5                7.6 +/-    1.33      14.0 +/-    1.33  0.030 / 0.050
G11     44.1           12.2                3.5 +/-    2.03       9.4 +/-    2.03  0.020 / 0.020
G13     246.4          27.4                5.5 +/-    2.15      10.1 +/-    2.15  0.030 / 0.030
G15     277.9          15.0                1.8 +/-    2.20       4.4 +/-    2.20  0.210 / 0.300
G17     336.2          76.4                6.3 +/-    0.60       6.4 +/-    0.60  0.210 / 0.290
G19     257.5          64.8                5.8 +/-    0.68       6.3 +/-    0.68  0.170 / 0.190
G24     318.8          11.4               -6.6 +/-   26.12     -17.9 +/-   26.12  0.090 / 0.160
G28     60.9           50.3                5.4 +/-    0.38       6.8 +/-    0.38  0.140 / 0.170
G30     150.9          32.9                8.5 +/-    1.35      14.0 +/-    1.35  0.210 / 0.220