PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/04-23:28:10
G02     213.1          57.8               14.6 +/-    1.06      16.9 +/-    1.06  0.060 / 0.080
G06     67.2           76.6               13.2 +/-    1.01      13.5 +/-    1.01  0.040 / 0.080
G12     317.5          33.3               11.3 +/-    1.40      18.6 +/-    1.40  0.070 / 0.080
G17     52.3           37.6               10.9 +/-    0.57      16.5 +/-    0.57  0.060 / 0.090
G19     34.0           52.2               11.9 +/-    0.33      14.7 +/-    0.33  0.120 / 0.250
G24     269.8          42.2               11.8 +/-    1.16      16.6 +/-    1.16  0.110 / 0.280
G28     120.5          15.8               15.4 +/-    1.64      37.6 +/-    1.64  0.040 / 0.060