PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/15-16:58:10
G03     206.7          55.9               12.6 +/-    0.94      14.9 +/-    0.94  0.070 / 0.240
G07     259.1          20.1               11.9 +/-    2.16      26.0 +/-    2.16  0.060 / 0.270
G09     310.4          28.1                8.7 +/-    1.69      15.8 +/-    1.69  0.030 / 0.030
G16     108.1          65.8               12.0 +/-    0.82      13.0 +/-    0.82  0.030 / 0.040
G22     185.8          38.4               13.1 +/-    1.04      19.6 +/-    1.04  0.180 / 0.000
G23     329.6          59.6               11.3 +/-    0.43      12.8 +/-    0.43  0.220 / 0.310
G26     55.9           46.5               11.3 +/-    0.86      14.9 +/-    0.86  0.050 / 0.050
G27     135.6          10.3               -6.9 +/-   33.77     -19.1 +/-   33.77  0.060 / 0.050
G31     59.2           11.5                9.8 +/-    2.83      26.6 +/-    2.83  0.070 / 0.080