PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/26-15:57:50
G02     55.2           36.2               10.0 +/-    0.52      15.6 +/-    0.52  0.020 / 0.040
G05     73.3           67.9               11.6 +/-    0.43      12.4 +/-    0.43  0.020 / 0.040
G12     187.4          40.0               15.5 +/-    2.31      22.5 +/-    2.31  0.050 / 0.060
G13     134.3          10.9                5.8 +/-   35.27      15.9 +/-   35.27  0.040 / 0.070
G20     205.2          52.5               14.8 +/-    1.16      18.1 +/-    1.16  0.060 / 0.080
G21     267.2          16.0               12.1 +/-    1.88      29.5 +/-    1.88  0.070 / 0.080
G25     243.9          55.5               13.0 +/-    0.63      15.5 +/-    0.63  0.150 / 0.390
G29     329.0          54.5                7.9 +/-    1.44       9.5 +/-    1.44  0.150 / 0.480