PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/04-22:28:00
G02     47.3           43.3                9.7 +/-    1.03      13.3 +/-    1.03  0.030 / 0.030
G05     90.9           69.1               10.2 +/-    0.48      10.9 +/-    0.48  0.030 / 0.030
G12     185.6          46.4               11.9 +/-    2.52      15.8 +/-    2.52  0.030 / 0.070
G25     263.6          58.3               10.1 +/-    1.64      11.7 +/-    1.64  0.040 / 0.060
G29     318.3          40.4               10.9 +/-    1.55      15.8 +/-    1.55  0.050 / 0.050