PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/25-08:27:50
G02     27.3           60.9                4.5 +/-    0.35       5.1 +/-    0.35  0.030 / 0.040
G05     150.0          54.3                7.1 +/-    0.81       8.6 +/-    0.81  0.030 / 0.040
G06     48.3           26.1                4.1 +/-    0.65       7.8 +/-    0.65  0.030 / 0.030
G12     227.9          76.9                3.9 +/-    0.39       4.0 +/-    0.39  0.030 / 0.030
G19     93.2           14.7                5.4 +/-    0.66      13.5 +/-    0.66  0.060 / 0.070
G20     199.6          14.0                3.3 +/-    2.86       8.5 +/-    2.86  0.040 / 0.060
G25     307.9          46.4                4.6 +/-    0.92       6.0 +/-    0.92  0.140 / 0.410
G29     302.0          23.5                4.5 +/-    1.61       9.2 +/-    1.61  0.150 / 0.430