PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/27-09:57:40
G02     36.8           52.0                7.4 +/-    0.65       9.2 +/-    0.65  0.040 / 0.050
G05     133.7          65.1               10.2 +/-    0.34      11.1 +/-    0.34  0.050 / 0.040
G06     55.3           14.6                3.9 +/-    2.71       9.9 +/-    2.71  0.030 / 0.040
G12     196.3          64.2                9.1 +/-    1.00      10.0 +/-    1.00  0.030 / 0.040
G25     282.0          59.9                8.7 +/-    3.84       9.9 +/-    3.84  0.180 / 0.200
G29     311.2          32.8                4.3 +/-    1.69       7.2 +/-    1.69  0.180 / 0.160