PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/13-22:57:50
G02     201.6          30.3               12.4 +/-    1.36      21.6 +/-    1.36  0.090 / 0.080
G06     170.3          61.2               12.2 +/-    0.46      13.7 +/-    0.46  0.070 / 0.100
G17     32.2           52.1               10.6 +/-    1.20      13.0 +/-    1.20  0.050 / 0.080
G19     349.7          68.0                9.7 +/-    1.01      10.4 +/-    1.01  0.050 / 0.100
G24     301.7          36.4                9.6 +/-    2.40      14.9 +/-    2.40  0.040 / 0.030
G28     95.0           37.9               12.4 +/-    0.96      18.7 +/-    0.96  0.040 / 0.040