PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/18-21:58:00
G02     56.9           35.4               10.0 +/-    1.44      15.8 +/-    1.44  0.030 / 0.040
G05     61.7           62.9               10.1 +/-    0.54      11.2 +/-    0.54  0.030 / 0.030
G12     182.8          32.7               13.2 +/-    1.05      21.8 +/-    1.05  0.110 / 0.330
G13     129.8          13.6               13.4 +/-    2.64      34.4 +/-    2.64  0.110 / 0.310
G21     269.1          15.0               10.8 +/-    2.58      26.8 +/-    2.58  0.160 / 0.360
G25     239.8          53.5               12.9 +/-    5.21      15.6 +/-    5.21  0.200 / 0.320
G29     325.9          51.1               11.0 +/-    1.80      13.8 +/-    1.80  0.090 / 0.080