PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/12-13:27:40
G10     248.0          26.6                4.9 +/-    1.39       9.1 +/-    1.39  0.160 / 0.370
G13     55.7           30.1                5.5 +/-    2.14       9.6 +/-    2.14  0.160 / 0.410
G15     86.3           56.1                6.1 +/-    0.88       7.2 +/-    0.88  0.130 / 0.130
G16     298.1          16.0                5.3 +/-    2.86      12.9 +/-    2.86  0.140 / 0.130
G20     268.9          51.9                6.7 +/-    3.38       8.2 +/-    3.38  0.030 / 0.040
G21     332.3          58.6                3.3 +/-    0.45       3.8 +/-    0.45  0.040 / 0.030
G26     271.8          16.5                5.7 +/-    1.55      13.6 +/-    1.55  0.040 / 0.050
G29     162.7          54.8                6.8 +/-    0.51       8.1 +/-    0.51  0.040 / 0.040