PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/21-01:57:30
G02     204.4          42.1                8.7 +/-    0.53      12.3 +/-    0.53  0.080 / 0.150
G06     151.7          74.2                6.8 +/-    0.38       7.1 +/-    0.38  0.110 / 0.200
G12     310.3          18.7                5.6 +/-    2.50      12.8 +/-    2.50  0.030 / 0.040
G17     38.4           47.8                5.4 +/-    2.21       7.1 +/-    2.21  0.030 / 0.050
G19     11.8           61.9                5.2 +/-    0.50       5.8 +/-    0.50  0.030 / 0.030
G24     292.1          40.1                2.6 +/-    6.20       3.8 +/-    6.20  0.040 / 0.030
G28     108.0          27.0                6.4 +/-    1.30      11.9 +/-    1.30  0.110 / 0.140