PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/23-16:27:50
G01     277.2          41.3                8.5 +/-    0.72      12.1 +/-    0.72  0.050 / 0.050
G03     315.4          28.8                6.8 +/-    1.32      12.3 +/-    1.32  0.060 / 0.060
G10     127.0          21.0               11.1 +/-    0.86      23.9 +/-    0.86  0.050 / 0.050
G11     258.0          22.3                9.0 +/-    1.47      18.8 +/-    1.47  0.060 / 0.050
G14     35.8           54.0                7.3 +/-    1.97       8.8 +/-    1.97  0.080 / 0.130
G22     314.8          49.4                6.7 +/-    0.70       8.6 +/-    0.70  0.100 / 0.100
G25     57.3           18.3                7.4 +/-    1.80      17.0 +/-    1.80  0.020 / 0.020
G26     150.1          21.6               12.2 +/-    0.94      25.9 +/-    0.94  0.020 / 0.020
G31     67.0           76.9                9.0 +/-    0.38       9.3 +/-    0.38  0.060 / 0.080
G32     60.8           34.6                8.0 +/-    1.51      12.8 +/-    1.51  0.060 / 0.080