PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/11-17:28:00
G07     9.1            67.3               14.0 +/-    0.87      15.0 +/-    0.87  0.080 / 0.040
G08     69.0           51.2               14.9 +/-    0.85      18.6 +/-    0.85  0.040 / 0.040
G09     180.5          52.2               17.4 +/-    1.26      21.4 +/-    1.26  0.050 / 0.040
G11     133.0          25.8               15.6 +/-    5.59      30.0 +/-    5.59  0.040 / 0.050
G23     158.2          17.3               17.6 +/-    1.40      41.4 +/-    1.40  0.030 / 0.030
G27     41.3           18.5               11.3 +/-    2.27      25.8 +/-    2.27  0.030 / 0.030
G28     256.7          44.3               16.4 +/-    3.62      22.3 +/-    3.62  0.100 / 0.200
G30     319.3          49.8               13.9 +/-    0.40      17.5 +/-    0.40  0.080 / 0.170