PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/21-02:57:40
G02     224.6          70.2                5.4 +/-    0.66       5.7 +/-    0.66  0.050 / 0.050
G06     45.3           68.0                3.8 +/-    0.40       4.1 +/-    0.40  0.030 / 0.040
G12     320.4          42.6                4.1 +/-    0.85       5.7 +/-    0.85  0.050 / 0.080
G17     62.5           30.0                4.1 +/-    1.23       7.1 +/-    1.23  0.040 / 0.080
G19     48.3           44.1                4.1 +/-    0.83       5.6 +/-    0.83  0.030 / 0.030
G24     255.6          39.0                6.5 +/-    1.66       9.7 +/-    1.66  0.030 / 0.030