PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/19-07:12:50
G02     38.2           51.1                3.9 +/-    0.59       4.8 +/-    0.59  0.040 / 0.040
G05     129.7          64.9                6.9 +/-    0.83       7.6 +/-    0.83  0.030 / 0.070
G06     55.0           15.5                3.1 +/-    2.48       7.7 +/-    2.48  0.090 / 0.300
G12     198.9          65.3                4.7 +/-    1.25       5.1 +/-    1.25  0.080 / 0.260
G20     201.2          24.6                3.0 +/-    1.38       5.8 +/-    1.38  0.130 / 0.380
G25     292.9          54.7                4.5 +/-    0.44       5.3 +/-    0.44  0.220 / 0.330
G29     310.3          31.5                2.8 +/-    1.24       4.8 +/-    1.24  0.030 / 0.040