PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/31-07:58:00
G10     247.6          23.8                7.0 +/-    1.41      14.0 +/-    1.41  0.120 / 0.360
G13     57.4           32.2                4.5 +/-    1.68       7.5 +/-    1.68  0.090 / 0.360
G15     91.7           57.2                6.9 +/-    1.54       8.0 +/-    1.54  0.040 / 0.040
G16     299.4          15.3                3.2 +/-    1.71       7.9 +/-    1.71  0.030 / 0.040
G20     12.9           68.5                3.5 +/-    0.43       3.7 +/-    0.43  0.040 / 0.040
G21     330.3          58.3                4.0 +/-    0.81       4.6 +/-    0.81  0.030 / 0.040
G26     270.4          17.0                7.4 +/-    1.49      17.5 +/-    1.49  0.070 / 0.120
G29     163.6          53.6                7.6 +/-    0.64       9.1 +/-    0.64  0.080 / 0.130