PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/16-09:57:00
G02     43.4           45.2                4.7 +/-    1.01       6.2 +/-    1.01  0.040 / 0.030
G05     121.0          68.5                6.4 +/-    0.31       6.8 +/-    0.31  0.040 / 0.020
G12     187.7          56.2                7.1 +/-    0.56       8.4 +/-    0.56  0.050 / 0.040
G25     279.2          58.1               14.0 +/-    1.57      16.2 +/-    1.57  0.050 / 0.040
G29     313.2          34.4                2.2 +/-    0.98       3.5 +/-    0.98  0.040 / 0.050