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               10.8 +/-    0.96      11.9 +/-    0.96  0.040 / 0.040
G08     79.5           53.1               11.4 +/-    0.61      13.9 +/-    0.61  0.040 / 0.040
G09     181.9          59.6               14.3 +/-    0.66      16.3 +/-    0.66  0.050 / 0.040
G11     137.9          21.3               13.6 +/-    2.72      28.9 +/-    2.72  0.050 / 0.040
G23     157.4          24.6               12.9 +/-    1.71      25.5 +/-    1.71  0.070 / 0.050
G27     44.9           23.6                8.5 +/-    2.75      17.1 +/-    2.75  0.070 / 0.090
G28     249.1          39.5               13.6 +/-    1.28      19.9 +/-    1.28  0.090 / 0.160
G30     313.0          44.5               10.1 +/-    1.39      13.8 +/-    1.39  0.110 / 0.170