PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/21-04:12:30
G02     37.3           51.4                3.9 +/-    1.04       4.8 +/-    1.04  0.030 / 0.040
G05     129.2          65.2                5.2 +/-    0.41       5.7 +/-    0.41  0.040 / 0.040
G06     54.1           17.0                2.0 +/-    1.22       4.8 +/-    1.22  0.050 / 0.050
G12     199.7          65.9                5.2 +/-    0.41       5.6 +/-    0.41  0.040 / 0.040
G25     288.6          57.0                0.7 +/-    1.72       0.8 +/-    1.72  0.040 / 0.030
G29     313.0          35.9                3.4 +/-    0.81       5.3 +/-    0.81  0.030 / 0.030