PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/07-12:13:10
G10     265.4          36.8                6.8 +/-    1.68      10.5 +/-    1.68  0.130 / 0.160
G13     42.9           20.1                2.9 +/-    1.81       6.4 +/-    1.81  0.100 / 0.140
G15     59.4           48.3                4.7 +/-    0.80       6.0 +/-    0.80  0.060 / 0.070
G16     282.1          12.0                5.1 +/-    2.26      13.6 +/-    2.26  0.060 / 0.070
G20     50.6           40.7                2.8 +/-    1.00       4.0 +/-    1.00  0.030 / 0.040
G21     7.5            72.2                5.1 +/-    0.50       5.3 +/-    0.50  0.030 / 0.030
G24     122.2          13.2                5.2 +/-    1.71      13.5 +/-    1.71  0.230 / 0.540
G27     318.7          18.7                4.4 +/-    2.03      10.0 +/-    2.03  0.220 / 0.410
G29     167.0          30.7                5.2 +/-    0.84       9.0 +/-    0.84  0.110 / 0.060