PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/13-10:58:00
G10     269.3          40.2                4.8 +/-    0.97       7.0 +/-    0.97  0.070 / 0.060
G13     40.9           16.3                2.8 +/-    2.20       6.9 +/-    2.20  0.070 / 0.070
G15     56.8           46.9                4.3 +/-    0.98       5.6 +/-    0.98  0.150 / 0.250
G16     281.5          11.2                4.1 +/-    1.07      11.2 +/-    1.07  0.120 / 0.290
G20     301.9          61.3                4.1 +/-    0.56       4.6 +/-    0.56  0.030 / 0.030
G21     26.8           74.0                5.7 +/-    0.36       5.9 +/-    0.36  0.040 / 0.040
G24     116.3          15.6                5.9 +/-    2.01      14.3 +/-    2.01  0.200 / 0.250
G27     318.9          18.2                3.5 +/-    1.30       8.0 +/-    1.30  0.200 / 0.240
G29     165.8          25.6                4.9 +/-    1.61       9.4 +/-    1.61  0.230 / 0.260