PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/15-12:42:40
G01     287.4          40.7               -1.6 +/-    0.99      -2.3 +/-    0.99  0.060 / 0.050
G03     313.4          22.0                3.7 +/-    1.68       7.7 +/-    1.68  0.050 / 0.050
G10     121.8          26.7                5.2 +/-    1.03       9.8 +/-    1.03  0.160 / 0.250
G11     264.3          24.9                4.8 +/-    3.99       9.4 +/-    3.99  0.180 / 0.200
G14     22.5           59.4                5.0 +/-    0.69       5.8 +/-    0.69  0.050 / 0.040
G18     250.4          46.3                5.0 +/-    5.38       6.6 +/-    5.38  0.060 / 0.030
G22     315.1          45.6                4.3 +/-    0.72       5.7 +/-    0.72  0.100 / 0.310
G25     64.8           19.1                5.0 +/-    1.58      11.3 +/-    1.58  0.120 / 0.200
G31     100.7          79.2                4.9 +/-    0.33       5.0 +/-    0.33  0.050 / 0.050
G32     54.7           38.9                3.9 +/-    1.19       5.8 +/-    1.19  0.060 / 0.060