PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/20-19:57:40
G02     238.1          74.2               13.8 +/-    0.60      14.3 +/-    0.60  0.150 / 0.110
G05     171.8          15.1               18.8 +/-    2.16      46.7 +/-    2.16  0.120 / 0.100
G06     40.8           60.5               11.1 +/-    0.36      12.6 +/-    0.36  0.150 / 0.150
G12     320.8          48.2               10.0 +/-    0.81      12.9 +/-    0.81  0.040 / 0.040
G17     68.5           24.4               10.2 +/-    0.89      20.1 +/-    0.89  0.040 / 0.040
G19     55.9           38.5               10.5 +/-    0.54      15.7 +/-    0.54  0.060 / 0.040
G24     246.8          35.4               14.5 +/-    1.06      22.8 +/-    1.06  0.040 / 0.030
G25     315.9          10.4              -16.0 +/-   27.50     -44.1 +/-   27.50  0.090 / 0.060