PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/22-07:58:00
G02     58.5           32.7                3.0 +/-    1.37       5.0 +/-    1.37  0.040 / 0.030
G05     61.6           62.3                3.3 +/-    0.54       3.6 +/-    0.54  0.030 / 0.030
G12     186.8          37.0                5.1 +/-    1.38       7.7 +/-    1.38  0.040 / 0.050
G13     131.3          13.1                3.4 +/-    2.65       8.9 +/-    2.65  0.040 / 0.070
G15     164.2          10.5               -5.1 +/-   17.45     -14.0 +/-   17.45  0.060 / 0.090
G20     209.1          50.7                5.3 +/-    0.78       6.6 +/-    0.78  0.050 / 0.090
G21     269.5          17.1                3.3 +/-    1.88       7.9 +/-    1.88  0.110 / 0.390
G25     243.0          53.8                5.8 +/-    0.69       7.0 +/-    0.69  0.150 / 0.350
G29     327.3          52.9                0.4 +/-    1.17       0.5 +/-    1.17  0.060 / 0.090