PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/20-20:28:00
G02     304.7          81.1               11.2 +/-    0.54      11.3 +/-    0.54  0.150 / 0.060
G05     166.5          27.4               15.4 +/-    1.57      28.6 +/-    1.57  0.110 / 0.050
G06     39.8           47.0                9.2 +/-    1.04      12.0 +/-    1.04  0.030 / 0.030
G12     318.5          62.1                9.2 +/-    0.75      10.3 +/-    0.75  0.030 / 0.030
G17     79.6           16.4               10.0 +/-    1.81      24.1 +/-    1.81  0.130 / 0.090
G19     69.1           30.1               10.1 +/-    2.17      17.7 +/-    2.17  0.120 / 0.100
G24     233.7          27.1               13.1 +/-    1.43      24.4 +/-    1.43  0.040 / 0.020
G25     317.5          22.3               10.2 +/-    1.50      21.2 +/-    1.50  0.040 / 0.020