PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/01-01:57:00
G02     48.8           41.2                8.8 +/-    0.69      12.5 +/-    0.69  0.040 / 0.050
G05     86.8           68.4                9.9 +/-    0.93      10.5 +/-    0.93  0.040 / 0.050
G12     190.2          50.2               12.3 +/-    0.88      15.5 +/-    0.88  0.040 / 0.040
G25     261.2          58.5               11.0 +/-    0.88      12.6 +/-    0.88  0.040 / 0.040
G29     322.0          45.6               10.5 +/-    1.04      14.1 +/-    1.04  0.030 / 0.020