PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/13-06:42:30
G02     38.1           50.7                2.6 +/-    1.18       3.2 +/-    1.18  0.030 / 0.020
G05     128.3          65.9                5.2 +/-    0.64       5.6 +/-    0.64  0.030 / 0.030
G06     54.8           16.4                1.3 +/-    1.83       3.1 +/-    1.83  0.040 / 0.030
G12     197.7          64.3                4.1 +/-    0.56       4.5 +/-    0.56  0.030 / 0.030
G25     284.3          58.5                3.5 +/-    0.92       4.0 +/-    0.92  0.030 / 0.040
G29     312.8          35.2                2.5 +/-    1.63       4.0 +/-    1.63  0.030 / 0.040