PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-23:28:10
G02     212.4          56.4               14.0 +/-    1.16      16.4 +/-    1.16  0.060 / 0.140
G06     86.0           80.3               11.4 +/-    0.55      11.6 +/-    0.55  0.050 / 0.110
G12     315.8          29.3                9.7 +/-    1.55      17.2 +/-    1.55  0.050 / 0.070
G17     53.8           34.5                9.7 +/-    0.72      15.6 +/-    0.72  0.050 / 0.090
G19     33.8           52.0               11.1 +/-    0.55      13.7 +/-    0.55  0.030 / 0.060
G24     269.9          42.5               12.3 +/-    0.77      17.2 +/-    0.77  0.040 / 0.060
G28     118.0          20.9               14.6 +/-    1.76      31.5 +/-    1.76  0.080 / 0.180