PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/21-20:27:50
G01     99.7           29.0               16.0 +/-    1.19      28.7 +/-    1.19  0.070 / 0.150
G07     116.5          53.1               16.1 +/-    0.76      19.5 +/-    0.76  0.070 / 0.150
G08     42.0           17.7               11.7 +/-    1.60      27.2 +/-    1.60  0.120 / 0.210
G11     81.2           43.0               16.6 +/-    0.61      23.1 +/-    0.61  0.180 / 0.360
G13     303.7          32.3               13.6 +/-    1.22      22.8 +/-    1.22  0.080 / 0.120
G17     210.3          40.5               16.2 +/-    0.92      23.3 +/-    0.92  0.110 / 0.130
G18     73.2           24.9               14.5 +/-    0.78      28.4 +/-    0.78  0.030 / 0.030
G19     211.4          18.6               18.7 +/-    2.14      42.7 +/-    2.14  0.040 / 0.030
G28     333.1          61.8               13.9 +/-    0.37      15.6 +/-    0.37  0.030 / 0.040
G30     71.7           78.8               16.6 +/-    1.10      16.9 +/-    1.10  0.070 / 0.070