PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/20-16:27:50
G01     284.9          41.0                8.5 +/-    1.21      12.2 +/-    1.21  0.020 / 0.030
G03     313.9          23.8                8.1 +/-    3.22      16.2 +/-    3.22  0.020 / 0.030
G10     123.2          25.5               10.6 +/-    0.85      20.4 +/-    0.85  0.040 / 0.080
G11     263.5          24.3               10.0 +/-    1.75      19.8 +/-    1.75  0.060 / 0.080
G14     28.3           57.2                7.1 +/-    0.95       8.3 +/-    0.95  0.080 / 0.100
G22     314.6          44.1                8.0 +/-    1.42      10.9 +/-    1.42  0.050 / 0.100
G25     62.8           19.0                9.0 +/-    0.59      20.2 +/-    0.59  0.040 / 0.060
G26     153.5          17.1               12.5 +/-    1.31      29.5 +/-    1.31  0.040 / 0.060
G31     95.8           79.7                9.5 +/-    0.35       9.6 +/-    0.35  0.050 / 0.080
G32     55.8           38.3                8.0 +/-    0.58      11.9 +/-    0.58  0.050 / 0.080