PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/20-19:58:00
G02     61.6           32.1                8.2 +/-    2.57      13.8 +/-    2.57  0.030 / 0.040
G05     53.4           58.0               10.4 +/-    0.41      12.0 +/-    0.41  0.030 / 0.040
G12     180.7          24.7               13.4 +/-    2.80      26.4 +/-    2.80  0.170 / 0.300
G13     124.4          18.0               13.3 +/-    2.14      30.8 +/-    2.14  0.210 / 0.370
G15     164.3          13.9               16.4 +/-    1.60      41.9 +/-    1.60  0.110 / 0.120
G21     274.3          18.9               11.7 +/-    1.17      26.4 +/-    1.17  0.110 / 0.120
G25     229.4          48.6               12.4 +/-    2.29      15.9 +/-    2.29  0.120 / 0.090
G29     329.9          57.3               10.9 +/-    0.69      12.7 +/-    0.69  0.110 / 0.060