PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/24-20:27:50
G01     93.3           31.1               13.9 +/-    0.74      23.8 +/-    0.74  0.090 / 0.150
G07     122.9          48.3               14.2 +/-    0.77      18.3 +/-    0.77  0.140 / 0.150
G08     42.3           12.9                8.2 +/-    1.81      21.5 +/-    1.81  0.080 / 0.130
G11     73.5           41.6               14.0 +/-    0.71      19.9 +/-    0.71  0.090 / 0.130
G13     297.9          34.9               12.6 +/-    1.80      20.0 +/-    1.80  0.040 / 0.090
G17     213.6          46.4               16.4 +/-    1.85      21.7 +/-    1.85  0.040 / 0.080
G18     67.1           24.5               11.6 +/-    0.80      22.8 +/-    0.80  0.040 / 0.040
G19     213.6          23.8               17.5 +/-    2.06      35.3 +/-    2.06  0.040 / 0.050
G28     344.6          61.8               11.9 +/-    0.45      13.3 +/-    0.45  0.040 / 0.060
G30     97.8           76.3               13.6 +/-    1.20      14.0 +/-    1.20  0.040 / 0.060