PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/22-00:28:10
G02     297.8          81.6                9.5 +/-    0.91       9.5 +/-    0.91  0.080 / 0.160
G05     167.0          25.8               15.7 +/-    1.38      30.2 +/-    1.38  0.080 / 0.180
G06     38.9           51.5                9.4 +/-    0.71      11.7 +/-    0.71  0.040 / 0.040
G12     319.4          59.2                9.7 +/-    0.86      11.1 +/-    0.86  0.030 / 0.050
G17     79.0           15.8                9.7 +/-    1.98      23.7 +/-    1.98  0.120 / 0.290
G19     66.7           32.1                8.8 +/-    2.19      14.8 +/-    2.19  0.160 / 0.200
G24     234.3          28.3               12.9 +/-    1.84      23.5 +/-    1.84  0.040 / 0.040
G25     317.4          21.6                7.2 +/-    1.56      15.3 +/-    1.56  0.050 / 0.050