PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/28-16:27:40
G02     42.3           47.9                6.9 +/-    0.75       8.9 +/-    0.75  0.040 / 0.040
G05     114.3          70.4                8.8 +/-    0.67       9.3 +/-    0.67  0.030 / 0.050
G12     186.4          50.5               10.6 +/-    0.73      13.3 +/-    0.73  0.040 / 0.040
G25     266.2          59.6                7.6 +/-    2.17       8.6 +/-    2.17  0.040 / 0.040
G29     316.4          38.1                7.2 +/-    1.34      10.8 +/-    1.34  0.030 / 0.030