PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/23-01:12:50
G02     44.4           45.5                8.6 +/-    0.70      11.5 +/-    0.70  0.030 / 0.040
G05     104.0          68.8               10.6 +/-    0.89      11.3 +/-    0.89  0.030 / 0.040
G12     189.1          53.4               12.2 +/-    0.71      14.8 +/-    0.71  0.030 / 0.030
G25     275.2          58.0               14.8 +/-    2.00      17.1 +/-    2.00  0.030 / 0.030
G29     315.3          36.7                9.8 +/-    1.02      15.0 +/-    1.02  0.040 / 0.050