PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/15-11:12:30
G02     68.6           23.8                5.3 +/-    1.77      10.6 +/-    1.77  0.040 / 0.040
G05     48.8           53.7                5.6 +/-    0.58       6.8 +/-    0.58  0.040 / 0.040
G12     180.9          21.7                5.5 +/-    1.17      11.5 +/-    1.17  0.130 / 0.240
G13     118.3          21.2                8.8 +/-    2.19      18.7 +/-    2.19  0.140 / 0.230
G15     155.2          22.2                5.7 +/-    1.64      11.9 +/-    1.64  0.130 / 0.160
G21     280.3          24.0                4.5 +/-    2.13       9.0 +/-    2.13  0.150 / 0.240
G25     223.8          44.4                5.4 +/-    2.88       7.4 +/-    2.88  0.030 / 0.030
G29     334.7          63.1                5.5 +/-    0.62       6.1 +/-    0.62  0.030 / 0.030