PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/08-07:57:40
G02     38.2           51.1                4.5 +/-    0.59       5.7 +/-    0.59  0.090 / 0.240
G05     130.2          64.9                7.9 +/-    0.56       8.6 +/-    0.56  0.070 / 0.210
G06     54.8           16.0                3.3 +/-    0.83       7.9 +/-    0.83  0.030 / 0.030
G12     199.1          65.4                7.4 +/-    1.05       8.0 +/-    1.05  0.030 / 0.040
G20     201.0          25.0                4.1 +/-    1.03       8.1 +/-    1.03  0.030 / 0.040
G25     292.8          54.7                4.7 +/-    0.58       5.6 +/-    0.58  0.030 / 0.040
G29     310.4          31.9                3.4 +/-    1.03       5.7 +/-    1.03  0.040 / 0.050