PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/21-01:57:50
G02     359.8          75.7                5.5 +/-    0.57       5.6 +/-    0.57  0.020 / 0.030
G05     161.3          37.7                9.4 +/-    1.20      14.2 +/-    1.20  0.030 / 0.040
G06     42.5           37.3                4.7 +/-    0.61       7.2 +/-    0.61  0.040 / 0.080
G12     305.3          73.9                6.1 +/-    0.55       6.3 +/-    0.55  0.040 / 0.060
G17     87.0           13.3                5.7 +/-    0.82      14.9 +/-    0.82  0.080 / 0.150
G19     77.6           26.1                6.5 +/-    1.73      12.4 +/-    1.73  0.100 / 0.170
G24     226.1          20.5               10.9 +/-    1.89      23.6 +/-    1.89  0.030 / 0.040
G25     316.8          30.9                5.2 +/-    1.46       8.9 +/-    1.46  0.040 / 0.050
G29     288.4          10.3               -7.8 +/-   16.20     -21.7 +/-   16.20  0.080 / 0.150