PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/28-22:42:30
G02     200.4          25.1               16.2 +/-    1.61      31.5 +/-    1.61  0.040 / 0.090
G06     168.6          58.1               15.4 +/-    1.03      17.8 +/-    1.03  0.040 / 0.110
G13     225.0          10.8               19.3 +/-    5.74      53.0 +/-    5.74  0.110 / 0.120
G17     19.8           60.3               11.5 +/-    0.49      13.0 +/-    0.49  0.110 / 0.120
G19     330.5          70.2               11.2 +/-    0.40      11.8 +/-    0.40  0.070 / 0.230
G24     307.6          32.0                9.0 +/-    1.73      15.1 +/-    1.73  0.070 / 0.170
G28     92.1           37.4               12.6 +/-    0.84      19.2 +/-    0.84  0.040 / 0.040
G30     157.1          10.3               18.0 +/-    4.33      49.9 +/-    4.33  0.040 / 0.050