PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/09-08:12:50
G08     269.8          19.2                4.4 +/-    1.98       9.9 +/-    1.98  0.110 / 0.200
G10     58.5           58.2                4.4 +/-    0.60       5.0 +/-    0.60  0.120 / 0.180
G14     261.9          65.6                4.7 +/-    0.89       5.1 +/-    0.89  0.110 / 0.230
G18     313.2          31.5                3.2 +/-    1.06       5.4 +/-    1.06  0.240 / 0.280
G20     93.3           38.0                5.8 +/-    0.70       8.7 +/-    0.70  0.030 / 0.030
G21     154.3          16.7                4.2 +/-    1.85      10.1 +/-    1.85  0.030 / 0.020
G24     40.4           10.8                2.1 +/-    2.00       5.7 +/-    2.00  0.040 / 0.050
G27     234.7          18.0                4.3 +/-    4.45       9.8 +/-    4.45  0.040 / 0.060
G31     178.8          27.8                5.0 +/-    2.24       9.2 +/-    2.24  0.200 / 0.230
G32     313.0          74.9                5.0 +/-    0.53       5.1 +/-    0.53  0.090 / 0.260