PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/02-20:43:00
G01     66.8           32.4               12.5 +/-    0.62      20.8 +/-    0.62  0.080 / 0.390
G07     139.4          28.3               14.0 +/-    2.06      25.5 +/-    2.06  0.100 / 0.360
G11     52.1           29.3               10.5 +/-    1.53      18.6 +/-    1.53  0.040 / 0.080
G13     270.3          36.9               13.8 +/-    1.01      21.1 +/-    1.01  0.050 / 0.080
G15     299.6          15.8                9.0 +/-    2.90      21.8 +/-    2.90  0.050 / 0.120
G17     238.0          67.9               15.8 +/-    0.76      16.9 +/-    0.76  0.060 / 0.120
G18     46.7           16.7                9.8 +/-    0.88      23.3 +/-    0.88  0.030 / 0.050
G19     227.0          44.1               17.5 +/-    1.00      23.9 +/-    1.00  0.030 / 0.060
G28     26.3           58.3               11.7 +/-    0.84      13.5 +/-    0.84  0.060 / 0.160
G30     138.8          57.0               14.4 +/-    1.02      16.8 +/-    1.02  0.060 / 0.160