PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/07-08:57:40
G02     58.0           33.1                2.8 +/-    0.73       4.7 +/-    0.73  0.050 / 0.070
G05     62.9           63.0                4.8 +/-    0.41       5.3 +/-    0.41  0.070 / 0.080
G12     187.1          37.7                6.2 +/-    1.61       9.4 +/-    1.61  0.030 / 0.030
G13     131.8          12.7                4.9 +/-    2.89      12.8 +/-    2.89  0.030 / 0.030
G15     164.5          10.0               -9.1 +/-    9.63     -25.4 +/-    9.63  0.040 / 0.060
G20     208.5          50.8                6.5 +/-    0.96       8.1 +/-    0.96  0.040 / 0.060
G21     269.2          17.3                5.7 +/-    2.81      13.5 +/-    2.81  0.050 / 0.060
G25     243.8          54.2                6.6 +/-    0.77       7.9 +/-    0.77  0.040 / 0.060
G29     327.3          52.9                2.7 +/-    0.85       3.3 +/-    0.85  0.040 / 0.050