PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/19-02:12:50
G02     60.1           31.9                8.3 +/-    2.41      14.0 +/-    2.41  0.200 / 0.440
G05     57.0           59.7                9.4 +/-    0.51      10.7 +/-    0.51  0.340 / 0.360
G12     184.4          32.1               11.1 +/-    1.29      18.6 +/-    1.29  0.060 / 0.080
G13     128.3          15.2               12.3 +/-    2.71      30.3 +/-    2.71  0.070 / 0.080
G15     163.8          12.2               10.8 +/-    3.16      28.7 +/-    3.16  0.190 / 0.360
G20     218.6          14.3               12.6 +/-    1.57      31.9 +/-    1.57  0.130 / 0.380
G21     271.2          16.9               12.2 +/-    1.86      28.9 +/-    1.86  0.040 / 0.030
G25     237.8          51.9               12.1 +/-    2.45      14.9 +/-    2.45  0.030 / 0.030
G29     327.7          53.8                8.9 +/-    0.72      10.8 +/-    0.72  0.130 / 0.350