PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/23-15:12:40
G03     210.9          58.2               11.0 +/-    0.48      12.7 +/-    0.48  0.040 / 0.030
G07     255.8          13.9                9.6 +/-    3.18      24.5 +/-    3.18  0.040 / 0.030
G09     309.5          26.5                7.8 +/-    1.30      14.8 +/-    1.30  0.140 / 0.370
G14     107.6          10.1                8.7 +/-    1.42      24.2 +/-    1.42  0.130 / 0.340
G16     96.4           64.0                9.0 +/-    0.91       9.9 +/-    0.91  0.030 / 0.040
G22     184.3          39.4               10.2 +/-    0.88      14.9 +/-    0.88  0.030 / 0.050
G23     334.7          62.7                8.7 +/-    0.61       9.6 +/-    0.61  0.060 / 0.080
G26     53.7           42.8                8.7 +/-    0.87      12.2 +/-    0.87  0.060 / 0.070
G27     134.7          9.9               -10.9 +/-   24.31     -30.5 +/-   24.31  0.060 / 0.290
G31     59.2           9.6                 8.7 +/-    3.70      24.4 +/-    3.70  0.090 / 0.300