PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/31-04:12:50
G01     317.0          22.3                3.7 +/-    2.83       7.7 +/-    2.83  0.120 / 0.300
G08     252.1          10.4               10.1 +/-    2.44      27.8 +/-    2.44  0.160 / 0.350
G10     87.8           49.9                6.6 +/-    0.73       8.3 +/-    0.73  0.050 / 0.050
G11     297.5          25.6                8.3 +/-    1.46      16.1 +/-    1.46  0.040 / 0.050
G14     308.7          70.5                7.1 +/-    1.08       7.5 +/-    1.08  0.100 / 0.220
G18     299.0          43.9                7.7 +/-    0.87      10.5 +/-    0.87  0.120 / 0.220
G20     100.9          47.0                8.6 +/-    2.02      11.3 +/-    2.02  0.030 / 0.040
G22     303.5          14.4                5.1 +/-    2.67      12.8 +/-    2.67  0.030 / 0.040
G31     172.1          49.9                8.1 +/-    1.42      10.3 +/-    1.42  0.100 / 0.200
G32     20.3           62.2                5.0 +/-    0.91       5.5 +/-    0.91  0.110 / 0.150