PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/20-22:58:00
G01     57.5           29.4                8.6 +/-    1.46      15.2 +/-    1.46  0.170 / 0.200
G06     182.0          13.5              -15.2 +/-   30.88     -39.3 +/-   30.88  0.120 / 0.360
G07     142.5          15.6               10.6 +/-    1.98      26.0 +/-    1.98  0.080 / 0.070
G11     46.5           20.9                7.5 +/-    2.50      16.1 +/-    2.50  0.090 / 0.070
G13     259.1          35.0               11.8 +/-    1.34      18.7 +/-    1.34  0.090 / 0.080
G15     291.1          16.5                7.9 +/-    0.92      18.9 +/-    0.92  0.080 / 0.070
G17     273.6          79.1                9.8 +/-    0.82      10.0 +/-    0.82  0.040 / 0.050
G19     234.3          52.5               11.1 +/-    2.14      13.6 +/-    2.14  0.040 / 0.050
G28     33.0           57.9                8.0 +/-    0.76       9.3 +/-    0.76  0.050 / 0.050
G30     145.1          49.5               10.4 +/-    0.37      13.2 +/-    0.37  0.050 / 0.040