PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/07-09:12:40
G10     262.2          36.0                8.3 +/-    1.08      12.9 +/-    1.08  0.040 / 0.040
G13     44.2           21.2                4.1 +/-    2.04       8.8 +/-    2.04  0.040 / 0.040
G15     64.0           51.4                5.1 +/-    0.96       6.3 +/-    0.96  0.090 / 0.210
G16     289.0          12.6                4.8 +/-    1.17      12.7 +/-    1.17  0.090 / 0.230
G20     289.4          58.2                6.2 +/-    1.23       7.1 +/-    1.23  0.070 / 0.060
G21     3.3            70.5                5.4 +/-    0.71       5.7 +/-    0.71  0.080 / 0.090
G24     122.5          11.7                6.2 +/-    1.28      16.6 +/-    1.28  0.210 / 0.310
G27     321.3          13.2                1.7 +/-    1.80       4.5 +/-    1.80  0.220 / 0.300
G29     164.3          31.6                6.8 +/-    1.29      11.6 +/-    1.29  0.200 / 0.330