PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/28-21:42:30
G07     334.6          58.5                9.7 +/-    1.07      11.2 +/-    1.07  0.040 / 0.060
G08     100.9          52.9               12.7 +/-    0.49      15.5 +/-    0.49  0.030 / 0.040
G09     192.6          72.9               11.0 +/-    0.74      11.5 +/-    0.74  0.090 / 0.140
G11     147.5          13.1               17.4 +/-    2.80      45.2 +/-    2.80  0.090 / 0.150
G23     155.4          38.2               13.1 +/-    1.20      19.7 +/-    1.20  0.080 / 0.090
G27     53.0           30.3               10.5 +/-    0.79      18.3 +/-    0.79  0.070 / 0.100
G28     238.9          31.4               10.5 +/-    2.17      17.8 +/-    2.17  0.070 / 0.100
G30     305.6          39.3                9.4 +/-    0.96      13.9 +/-    0.96  0.050 / 0.100