PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/12-00:57:20
G02     43.6           45.8                7.6 +/-    1.04      10.1 +/-    1.04  0.040 / 0.040
G05     106.5          68.7                8.1 +/-    0.94       8.6 +/-    0.94  0.050 / 0.040
G12     192.9          57.1                6.5 +/-    0.65       7.6 +/-    0.65  0.060 / 0.040
G25     275.1          58.5               14.0 +/-    1.84      16.2 +/-    1.84  0.070 / 0.060
G29     317.2          39.9                7.7 +/-    1.02      11.2 +/-    1.02  0.030 / 0.040