PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/09-07:27:50
G10     250.2          26.0                6.6 +/-    2.46      12.6 +/-    2.46  0.170 / 0.340
G13     54.3           30.6                4.6 +/-    1.74       7.9 +/-    1.74  0.110 / 0.310
G15     85.7           57.0                5.6 +/-    0.58       6.5 +/-    0.58  0.040 / 0.040
G16     296.1          15.4                2.2 +/-    1.45       5.5 +/-    1.45  0.050 / 0.040
G20     6.3            69.4                4.1 +/-    0.37       4.4 +/-    0.37  0.040 / 0.040
G21     333.7          60.2                3.1 +/-    0.61       3.5 +/-    0.61  0.030 / 0.040
G26     267.3          15.8                5.6 +/-    1.44      13.6 +/-    1.44  0.030 / 0.040
G29     164.7          50.3                6.7 +/-    0.61       8.4 +/-    0.61  0.050 / 0.050