PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/18-09:28:10
G02     36.3           51.9                4.6 +/-    0.75       5.7 +/-    0.75  0.030 / 0.030
G05     140.9          62.4                6.9 +/-    0.61       7.7 +/-    0.61  0.030 / 0.030
G06     53.7           14.9                3.8 +/-    2.90       9.4 +/-    2.90  0.030 / 0.030
G12     193.4          66.3                5.4 +/-    0.77       5.9 +/-    0.77  0.030 / 0.030
G25     295.1          54.3                4.7 +/-    1.92       5.6 +/-    1.92  0.040 / 0.050
G29     307.1          27.7                4.3 +/-    2.37       7.9 +/-    2.37  0.040 / 0.040