PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/17-14:28:00
G02     55.6           35.6                9.1 +/-    1.26      14.3 +/-    1.26  0.030 / 0.030
G05     71.5           67.1                9.7 +/-    0.33      10.4 +/-    0.33  0.030 / 0.020
G12     187.7          40.2               13.3 +/-    0.73      19.3 +/-    0.73  0.130 / 0.250
G13     134.1          11.0               12.3 +/-   12.61      33.7 +/-   12.61  0.190 / 0.300
G20     205.6          51.7               13.7 +/-    0.95      16.9 +/-    0.95  0.030 / 0.050
G21     267.6          16.9                9.1 +/-    3.04      21.7 +/-    3.04  0.040 / 0.050
G25     245.2          55.5               11.2 +/-    0.96      13.2 +/-    0.96  0.040 / 0.060
G29     328.7          54.1                7.5 +/-    0.44       9.0 +/-    0.44  0.050 / 0.070