PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/22-19:58:00
G10     247.8          24.6                9.1 +/-    2.22      17.9 +/-    2.22  0.040 / 0.060
G13     56.5           31.4                8.3 +/-    1.01      14.1 +/-    1.01  0.050 / 0.050
G15     103.0          59.7               10.2 +/-    0.94      11.6 +/-    0.94  0.160 / 0.690
G16     298.4          15.7                7.0 +/-    3.45      17.2 +/-    3.45  0.170 / 0.880
G20     265.5          48.6                8.3 +/-    1.79      10.7 +/-    1.79  0.050 / 0.150
G21     330.2          58.0                7.7 +/-    0.62       8.9 +/-    0.62  0.060 / 0.160
G26     270.9          16.8                8.6 +/-    2.24      20.5 +/-    2.24  0.030 / 0.050
G29     163.8          54.2               10.5 +/-    0.66      12.6 +/-    0.66  0.040 / 0.040