PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/15-21:27:20
G02     41.3           48.5                9.3 +/-    0.75      11.9 +/-    0.75  0.040 / 0.030
G05     113.1          68.7               10.1 +/-    0.40      10.8 +/-    0.40  0.030 / 0.030
G12     186.9          53.6               11.7 +/-    0.45      14.1 +/-    0.45  0.050 / 0.050
G25     277.6          58.2               14.8 +/-    1.22      17.1 +/-    1.22  0.040 / 0.040
G29     313.9          34.9                9.8 +/-    0.93      15.5 +/-    0.93  0.040 / 0.040