PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/27-23:42:30
G02     244.2          76.9               12.3 +/-    0.24      12.5 +/-    0.24  0.050 / 0.040
G05     170.8          17.0               18.1 +/-    3.09      43.0 +/-    3.09  0.040 / 0.040
G06     39.9           61.0               10.6 +/-    0.91      11.9 +/-    0.91  0.110 / 0.330
G12     320.8          49.3               11.6 +/-    0.86      14.8 +/-    0.86  0.120 / 0.140
G17     71.0           21.6               10.4 +/-    1.06      22.1 +/-    1.06  0.340 / 0.390
G19     57.2           38.0               11.4 +/-    1.49      17.1 +/-    1.49  0.130 / 0.320
G24     243.7          34.4               15.9 +/-    2.53      25.6 +/-    2.53  0.050 / 0.030
G25     316.4          13.0                5.2 +/-   29.55      13.5 +/-   29.55  0.050 / 0.040