PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/21-16:58:00
G02     254.3          76.9                8.7 +/-    0.55       8.9 +/-    0.55  0.090 / 0.190
G05     170.3          20.3               10.9 +/-    0.68      23.8 +/-    0.68  0.070 / 0.160
G06     40.4           50.8                7.6 +/-    0.38       9.5 +/-    0.38  0.080 / 0.150
G12     322.3          62.5                6.7 +/-    0.59       7.5 +/-    0.59  0.070 / 0.150
G17     75.9           17.8                8.1 +/-    0.94      18.8 +/-    0.94  0.030 / 0.050
G19     59.6           38.4                8.5 +/-    0.76      12.7 +/-    0.76  0.020 / 0.040
G24     237.9          31.4               11.3 +/-    1.82      19.2 +/-    1.82  0.120 / 0.190
G25     317.4          17.7                7.8 +/-    0.86      18.2 +/-    0.86  0.110 / 0.220