PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/28-19:42:50
G01     299.5          37.3               10.1 +/-    2.33      15.3 +/-    2.33  0.080 / 0.120
G03     309.3          11.8                4.0 +/-   28.96      10.7 +/-   28.96  0.060 / 0.100
G10     113.6          34.8               12.6 +/-    1.57      20.0 +/-    1.57  0.030 / 0.060
G11     274.3          27.6               12.2 +/-    2.26      22.5 +/-    2.26  0.020 / 0.050
G14     12.2           62.9                9.7 +/-    0.72      10.7 +/-    0.72  0.060 / 0.190
G22     312.0          31.9               10.2 +/-    2.18      17.1 +/-    2.18  0.080 / 0.130
G25     74.2           18.3                9.9 +/-    2.43      22.8 +/-    2.43  0.050 / 0.050
G31     159.3          72.6               13.1 +/-    0.39      13.7 +/-    0.39  0.040 / 0.050
G32     43.7           47.4                9.8 +/-    0.62      12.8 +/-    0.62  0.040 / 0.050