PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/07-15:27:50
G01     223.2          13.8                8.7 +/-    2.06      22.3 +/-    2.06  0.130 / 0.180
G03     264.4          71.5                9.2 +/-    0.65       9.6 +/-    0.65  0.160 / 0.200
G14     89.4           24.1                8.1 +/-    1.93      16.2 +/-    1.93  0.040 / 0.040
G16     141.0          50.1               10.0 +/-    0.54      12.5 +/-    0.54  0.040 / 0.050
G22     197.8          64.2                9.1 +/-    0.72      10.0 +/-    0.72  0.030 / 0.040
G23     313.3          43.9                9.4 +/-    0.96      12.9 +/-    0.96  0.030 / 0.040
G26     85.9           53.8                7.8 +/-    0.51       9.4 +/-    0.51  0.050 / 0.060
G31     47.6           26.7                6.1 +/-    2.67      11.5 +/-    2.67  0.060 / 0.060