PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/09-16:12:40
G03     191.3          29.0                9.9 +/-    2.40      17.7 +/-    2.40  0.230 / 0.330
G07     282.5          36.1                9.6 +/-    1.57      15.0 +/-    1.57  0.250 / 0.510
G08     148.1          18.9               10.2 +/-    2.31      23.0 +/-    2.31  0.040 / 0.050
G09     319.6          50.3                8.4 +/-    0.49      10.6 +/-    0.49  0.040 / 0.040
G16     50.9           53.5                7.1 +/-    0.95       8.6 +/-    0.95  0.080 / 0.130
G22     177.8          12.8               10.2 +/-    1.50      26.7 +/-    1.50  0.090 / 0.110
G23     26.0           82.0              -19.7 +/-    0.65     -19.9 +/-    0.65  0.030 / 0.030
G26     43.7           23.9                6.4 +/-    2.19      12.9 +/-    2.19  0.030 / 0.030
G27     114.3          27.4                9.8 +/-    0.92      18.1 +/-    0.92  0.050 / 0.050