PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/31-17:58:00
G01     92.6           31.3               11.4 +/-    0.55      19.5 +/-    0.55  0.130 / 0.310
G07     123.6          47.7               11.5 +/-    1.10      14.9 +/-    1.10  0.120 / 0.380
G08     42.3           10.7               10.2 +/-    2.14      28.0 +/-    2.14  0.030 / 0.060
G11     71.7           40.9               10.7 +/-    0.53      15.4 +/-    0.53  0.030 / 0.060
G13     296.9          35.3               12.7 +/-    0.60      20.1 +/-    0.60  0.030 / 0.040
G17     213.6          49.1               15.4 +/-    1.49      19.7 +/-    1.49  0.030 / 0.030
G18     66.1           24.3               10.0 +/-    1.00      19.8 +/-    1.00  0.040 / 0.060
G19     213.9          23.5               15.1 +/-    2.18      30.6 +/-    2.18  0.040 / 0.060
G28     345.4          61.8                9.6 +/-    0.45      10.7 +/-    0.45  0.040 / 0.080
G30     97.4           77.0               12.1 +/-    1.02      12.4 +/-    1.02  0.050 / 0.090