PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/23-00:28:00
G02     307.8          81.5                7.4 +/-    0.96       7.5 +/-    0.96  0.080 / 0.130
G05     166.4          27.1               10.3 +/-    0.61      19.2 +/-    0.61  0.090 / 0.170
G06     39.1           50.1                7.1 +/-    0.51       9.0 +/-    0.51  0.090 / 0.160
G12     318.8          60.7                7.9 +/-    1.17       9.0 +/-    1.17  0.100 / 0.160
G17     80.1           15.0                8.1 +/-    0.85      20.3 +/-    0.85  0.030 / 0.050
G19     68.0           31.2                8.9 +/-    0.77      15.2 +/-    0.77  0.030 / 0.040
G24     233.1          27.4               11.1 +/-    2.27      20.6 +/-    2.27  0.040 / 0.110
G25     317.4          22.9                5.4 +/-    2.02      11.1 +/-    2.02  0.050 / 0.100