PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/28-21:27:50
G01     53.1           27.4               10.7 +/-    1.61      19.9 +/-    1.61  0.180 / 0.400
G06     178.2          22.0               17.9 +/-    2.39      37.5 +/-    2.39  0.090 / 0.310
G07     145.2          16.1               17.2 +/-    2.67      41.6 +/-    2.67  0.040 / 0.050
G11     46.0           19.2                9.9 +/-    0.90      22.3 +/-    0.90  0.040 / 0.060
G13     254.6          32.2               14.8 +/-    1.32      24.8 +/-    1.32  0.080 / 0.110
G15     287.1          16.1               11.0 +/-    2.80      26.7 +/-    2.80  0.110 / 0.130
G17     277.4          76.3               12.7 +/-    0.98      13.0 +/-    0.98  0.070 / 0.180
G19     241.1          56.0               12.9 +/-    1.07      15.2 +/-    1.07  0.090 / 0.150
G28     47.7           54.0               12.2 +/-    0.46      14.7 +/-    0.46  0.080 / 0.280
G30     147.7          43.5               16.0 +/-    0.67      22.0 +/-    0.67  0.090 / 0.210