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                4.4 +/-    4.11       6.3 +/-    4.11  0.050 / 0.060
G03     313.9          23.8                8.3 +/-    1.61      16.7 +/-    1.61  0.040 / 0.050
G10     123.2          25.5                8.4 +/-    0.98      16.2 +/-    0.98  0.060 / 0.140
G11     263.5          24.3               10.8 +/-    3.10      21.4 +/-    3.10  0.070 / 0.100
G14     28.3           57.2                9.0 +/-    1.61      10.5 +/-    1.61  0.020 / 0.020
G22     314.6          44.1                9.0 +/-    1.20      12.3 +/-    1.20  0.020 / 0.020
G25     62.8           19.0                9.1 +/-    1.57      20.6 +/-    1.57  0.050 / 0.050
G26     153.5          17.1               11.8 +/-    2.47      28.0 +/-    2.47  0.070 / 0.060
G31     95.8           79.7               10.0 +/-    0.45      10.2 +/-    0.45  0.050 / 0.070
G32     55.8           38.3                8.5 +/-    0.79      12.6 +/-    0.79  0.060 / 0.080