PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/18-19:57:50
G03     190.2          22.1               13.6 +/-    2.69      28.4 +/-    2.69  0.060 / 0.090
G07     290.7          39.8               11.6 +/-    2.29      17.0 +/-    2.29  0.070 / 0.080
G08     140.9          26.9               14.1 +/-    2.34      26.5 +/-    2.34  0.040 / 0.030
G09     320.8          60.5               12.1 +/-    0.97      13.7 +/-    0.97  0.030 / 0.040
G16     44.7           44.9               10.1 +/-    1.06      13.6 +/-    1.06  0.060 / 0.080
G23     96.1           82.7               11.8 +/-    0.27      11.8 +/-    0.27  0.060 / 0.090
G26     43.7           18.3                9.5 +/-    1.83      21.7 +/-    1.83  0.080 / 0.200
G27     105.3          32.6               13.5 +/-    1.21      22.4 +/-    1.21  0.140 / 0.330
G30     272.0          11.1               -5.3 +/-   37.45     -14.3 +/-   37.45  0.040 / 0.060