PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-00:42:40
G02     303.6          81.6                8.2 +/-    0.95       8.3 +/-    0.95  0.040 / 0.050
G05     166.7          26.5               11.8 +/-    2.36      22.2 +/-    2.36  0.030 / 0.030
G06     39.0           50.9                7.8 +/-    0.55       9.7 +/-    0.55  0.100 / 0.180
G12     319.1          60.0                8.7 +/-    1.06       9.9 +/-    1.06  0.090 / 0.160
G17     79.7           15.2                7.5 +/-    1.85      18.5 +/-    1.85  0.070 / 0.130
G19     67.4           31.7                9.5 +/-    0.57      16.1 +/-    0.57  0.080 / 0.190
G24     233.5          27.8               11.0 +/-    2.50      20.1 +/-    2.50  0.040 / 0.110
G25     317.4          22.4                5.4 +/-    1.44      11.2 +/-    1.44  0.050 / 0.110