PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/13-21:12:50
G01     93.3           31.1               14.2 +/-    1.00      24.3 +/-    1.00  0.160 / 0.370
G07     122.9          48.3               15.4 +/-    0.68      19.9 +/-    0.68  0.290 / 0.160
G08     42.3           13.5               10.1 +/-    4.11      26.1 +/-    4.11  0.060 / 0.070
G11     73.9           41.8               12.6 +/-    1.49      17.8 +/-    1.49  0.070 / 0.060
G13     297.9          34.8               12.7 +/-    3.69      20.2 +/-    3.69  0.080 / 0.130
G17     213.6          46.2               13.3 +/-    0.64      17.6 +/-    0.64  0.080 / 0.170
G18     67.1           24.5               12.3 +/-    0.92      24.3 +/-    0.92  0.020 / 0.010
G19     213.6          24.0               17.5 +/-    1.73      34.9 +/-    1.73  0.030 / 0.010
G28     344.8          61.8               12.3 +/-    0.64      13.8 +/-    0.64  0.040 / 0.020
G30     98.7           75.9               15.1 +/-    0.47      15.5 +/-    0.47  0.040 / 0.020