PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/16-09:27:40
G02     32.7           55.2                3.8 +/-    0.68       4.6 +/-    0.68  0.030 / 0.040
G05     147.3          58.6                6.9 +/-    1.05       7.9 +/-    1.05  0.040 / 0.040
G06     51.5           17.9                2.6 +/-    1.71       6.1 +/-    1.71  0.030 / 0.030
G12     197.9          70.7                4.7 +/-    0.94       4.9 +/-    0.94  0.020 / 0.030
G25     300.9          51.6                5.5 +/-    2.02       6.8 +/-    2.02  0.050 / 0.050
G29     304.2          24.7                2.7 +/-    0.92       5.2 +/-    0.92  0.040 / 0.050