PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/19-19:58:00
G01     308.9          31.7                7.4 +/-    2.34      12.6 +/-    2.34  0.120 / 0.130
G10     103.6          42.2                9.4 +/-    0.84      13.2 +/-    0.84  0.070 / 0.100
G11     285.1          28.0                6.4 +/-    1.92      11.7 +/-    1.92  0.130 / 0.150
G14     352.1          67.8                6.8 +/-    0.38       7.3 +/-    0.38  0.080 / 0.160
G18     116.3          14.4               11.0 +/-    1.74      27.9 +/-    1.74  0.030 / 0.030
G22     308.7          23.6                7.8 +/-    0.79      15.7 +/-    0.79  0.030 / 0.030
G25     84.1           16.0                9.7 +/-    2.66      23.6 +/-    2.66  0.040 / 0.030
G31     171.3          61.4               10.7 +/-    0.44      12.0 +/-    0.44  0.030 / 0.020
G32     32.8           54.6                7.5 +/-    1.18       8.9 +/-    1.18  0.030 / 0.030