PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/15-00:57:50
G02     299.3          81.7                7.5 +/-    0.99       7.6 +/-    0.99  0.110 / 0.140
G05     166.9          25.9               12.2 +/-    1.74      23.3 +/-    1.74  0.150 / 0.160
G06     38.8           51.7                8.1 +/-    0.59      10.0 +/-    0.59  0.050 / 0.080
G12     319.3          59.4                7.7 +/-    0.70       8.8 +/-    0.70  0.060 / 0.090
G17     79.2           15.5                8.4 +/-    2.36      20.6 +/-    2.36  0.120 / 0.120
G19     66.7           32.1                7.4 +/-    2.91      12.4 +/-    2.91  0.110 / 0.150
G24     234.0          28.2               11.3 +/-    1.67      20.6 +/-    1.67  0.020 / 0.040
G25     317.4          22.0                6.4 +/-    1.37      13.3 +/-    1.37  0.030 / 0.040