PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/15-07:28:10
G02     38.1           51.2                2.6 +/-    0.68       3.2 +/-    0.68  0.030 / 0.040
G05     130.3          64.8                6.2 +/-    0.72       6.8 +/-    0.72  0.040 / 0.040
G06     54.8           15.8                1.7 +/-    2.66       4.1 +/-    2.66  0.160 / 0.260
G12     199.1          65.5                3.9 +/-    1.83       4.3 +/-    1.83  0.130 / 0.330
G20     201.1          24.6                2.9 +/-    1.91       5.8 +/-    1.91  0.090 / 0.330
G25     293.1          54.6                3.4 +/-    0.51       4.0 +/-    0.51  0.140 / 0.310
G29     310.2          31.5                3.0 +/-    1.36       5.2 +/-    1.36  0.030 / 0.050