PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/28-04:27:20
G02     227.6          72.2                4.9 +/-    0.43       5.1 +/-    0.43  0.230 / 0.430
G05     173.4          11.4               -1.5 +/-   15.74      -4.2 +/-   15.74  0.220 / 0.360
G06     43.8           67.1                2.7 +/-    0.37       2.9 +/-    0.37  0.050 / 0.040
G12     320.7          44.1                3.3 +/-    0.41       4.5 +/-    0.41  0.040 / 0.050
G17     64.7           28.0                2.9 +/-    1.46       5.3 +/-    1.46  0.070 / 0.100
G19     50.6           42.7                3.3 +/-    1.40       4.6 +/-    1.40  0.040 / 0.080
G24     253.6          38.2                4.3 +/-    1.21       6.4 +/-    1.21  0.020 / 0.030