PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/21-04:42:50
G02     218.9          66.1                5.0 +/-    1.07       5.4 +/-    1.07  0.040 / 0.030
G06     52.0           73.6                3.3 +/-    0.47       3.5 +/-    0.47  0.030 / 0.030
G12     319.3          38.1                2.3 +/-    1.32       3.4 +/-    1.32  0.170 / 0.360
G17     59.6           31.5                3.0 +/-    0.59       5.0 +/-    0.59  0.220 / 0.470
G19     44.0           46.5                1.4 +/-    0.37       1.8 +/-    0.37  0.060 / 0.060
G24     261.5          40.5                6.0 +/-    0.73       8.7 +/-    0.73  0.090 / 0.080
G28     125.3          10.2                4.2 +/-    3.16      11.6 +/-    3.16  0.090 / 0.080