PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/27-11:58:10
G01     284.3          41.1                6.7 +/-    1.46       9.6 +/-    1.46  0.050 / 0.060
G03     314.0          23.4                3.5 +/-    3.51       7.2 +/-    3.51  0.060 / 0.070
G10     123.5          24.9                6.6 +/-    0.65      13.0 +/-    0.65  0.050 / 0.150
G11     261.6          24.2                7.8 +/-    2.04      15.6 +/-    2.04  0.060 / 0.150
G14     25.3           58.4                5.3 +/-    0.67       6.1 +/-    0.67  0.080 / 0.170
G18     247.1          45.1                7.9 +/-    0.71      10.6 +/-    0.71  0.080 / 0.230
G25     62.4           19.0                3.5 +/-    0.57       8.0 +/-    0.57  0.050 / 0.040
G26     152.1          18.1                5.1 +/-    2.42      11.7 +/-    2.42  0.050 / 0.040
G31     86.4           78.6                7.2 +/-    0.53       7.3 +/-    0.53  0.060 / 0.030
G32     56.8           37.3                3.5 +/-    0.72       5.3 +/-    0.72  0.080 / 0.030