PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/17-04:57:30
G02     47.8           42.0                5.4 +/-    0.92       7.6 +/-    0.92  0.030 / 0.040
G05     92.0           68.9                6.3 +/-    0.60       6.7 +/-    0.60  0.040 / 0.040
G12     190.7          51.7                7.9 +/-    0.63       9.7 +/-    0.63  0.030 / 0.040
G25     261.5          59.1                5.2 +/-    1.10       5.9 +/-    1.10  0.040 / 0.040
G29     322.3          46.0                5.1 +/-    0.83       6.8 +/-    0.83  0.030 / 0.030