PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/20-03:13:10
G02     199.5          22.7                6.0 +/-    3.09      12.4 +/-    3.09  0.030 / 0.040
G06     173.4          52.4                7.6 +/-    0.95       9.4 +/-    0.95  0.030 / 0.030
G13     227.8          13.0                6.8 +/-    3.98      17.7 +/-    3.98  0.030 / 0.040
G17     19.6           61.0                3.7 +/-    0.20       4.1 +/-    0.20  0.030 / 0.050
G19     324.6          71.0                3.8 +/-    0.55       3.9 +/-    0.55  0.040 / 0.080
G24     310.5          29.0                3.2 +/-    1.18       5.7 +/-    1.18  0.040 / 0.090
G28     88.7           39.1                5.0 +/-    0.83       7.4 +/-    0.83  0.170 / 0.650
G30     155.9          11.0                6.2 +/-    1.39      17.1 +/-    1.39  0.140 / 0.510