PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/24-21:43:00
G01     53.7           27.8               10.8 +/-    1.14      19.8 +/-    1.14  0.100 / 0.350
G06     178.4          21.4                6.6 +/-   33.17      14.1 +/-   33.17  0.200 / 0.380
G07     145.0          16.7               14.2 +/-    1.40      33.8 +/-    1.40  0.080 / 0.100
G11     46.3           19.8               10.6 +/-    1.00      23.4 +/-    1.00  0.070 / 0.120
G13     255.3          32.5               13.6 +/-    1.48      22.6 +/-    1.48  0.090 / 0.250
G15     287.6          16.2               10.1 +/-    2.95      24.5 +/-    2.95  0.080 / 0.240
G17     273.9          75.9               14.1 +/-    0.91      14.5 +/-    0.91  0.040 / 0.060
G19     240.3          55.5               13.5 +/-    0.95      16.0 +/-    0.95  0.040 / 0.060
G28     46.8           54.2               12.4 +/-    0.33      14.9 +/-    0.33  0.060 / 0.170
G30     147.3          44.0               14.8 +/-    0.94      20.3 +/-    0.94  0.070 / 0.180