PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/02-18:12:50
G07     18.7           68.6                8.1 +/-    0.83       8.6 +/-    0.83  0.040 / 0.060
G08     64.2           49.8                9.7 +/-    0.55      12.3 +/-    0.55  0.040 / 0.060
G09     180.0          48.3               12.6 +/-    1.40      16.2 +/-    1.40  0.100 / 0.360
G11     130.2          28.2               13.2 +/-    0.94      24.0 +/-    0.94  0.080 / 0.340
G18     113.8          11.0                7.4 +/-   23.91      20.1 +/-   23.91  0.030 / 0.040
G23     158.4          13.3               13.1 +/-    1.23      33.9 +/-    1.23  0.040 / 0.040
G27     39.7           15.5                8.1 +/-    1.11      19.8 +/-    1.11  0.050 / 0.080
G28     261.3          46.8               12.6 +/-    1.38      16.5 +/-    1.38  0.050 / 0.110
G30     323.1          52.9               11.5 +/-    0.88      14.0 +/-    0.88  0.100 / 0.190