PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/22-16:28:00
G07     354.0          64.4               10.3 +/-    0.98      11.3 +/-    0.98  0.070 / 0.070
G08     79.5           53.1               12.6 +/-    0.62      15.4 +/-    0.62  0.070 / 0.060
G09     181.9          59.6               13.5 +/-    1.03      15.4 +/-    1.03  0.040 / 0.050
G11     137.9          21.3               14.3 +/-    1.88      30.4 +/-    1.88  0.030 / 0.050
G23     157.4          24.6               12.3 +/-    2.53      24.2 +/-    2.53  0.030 / 0.050
G27     44.9           23.6                7.0 +/-    0.95      14.2 +/-    0.95  0.040 / 0.040
G28     249.1          39.5               14.4 +/-    1.02      21.2 +/-    1.02  0.070 / 0.190
G30     313.0          44.5                8.8 +/-    0.79      12.0 +/-    0.79  0.060 / 0.180