PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/19-06:27:50
G10     304.7          54.0                4.0 +/-    0.61       4.9 +/-    0.61  0.030 / 0.040
G14     212.4          11.9               -0.5 +/-   13.34      -1.5 +/-   13.34  0.040 / 0.040
G15     45.6           23.9                3.1 +/-    2.49       6.2 +/-    2.49  0.150 / 0.430
G20     42.9           55.3                4.6 +/-    0.56       5.4 +/-    0.56  0.220 / 0.530
G21     109.7          71.2                6.8 +/-    0.52       7.1 +/-    0.52  0.050 / 0.070
G24     91.8           28.1                5.7 +/-    1.44      10.4 +/-    1.44  0.050 / 0.090
G27     294.4          36.2                4.2 +/-    1.24       6.5 +/-    1.24  0.050 / 0.040
G32     212.6          38.7                7.7 +/-    1.47      11.4 +/-    1.47  0.040 / 0.040