PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/21-18:27:50
G01     98.3           29.5               12.2 +/-    1.49      21.5 +/-    1.49  0.250 / 0.320
G07     118.1          52.0               11.9 +/-    0.38      14.6 +/-    0.38  0.240 / 0.390
G08     41.9           15.2                9.3 +/-    2.34      22.9 +/-    2.34  0.030 / 0.020
G11     78.5           42.4               11.3 +/-    0.83      15.9 +/-    0.83  0.030 / 0.020
G13     302.3          33.1               10.0 +/-    2.48      16.5 +/-    2.48  0.030 / 0.050
G17     210.6          43.5               14.2 +/-    0.66      19.6 +/-    0.66  0.040 / 0.050
G18     71.6           24.8               11.3 +/-    0.95      22.2 +/-    0.95  0.050 / 0.040
G19     211.9          19.1               12.1 +/-    1.79      27.2 +/-    1.79  0.030 / 0.040
G28     335.3          61.8               10.4 +/-    0.40      11.7 +/-    0.40  0.090 / 0.150
G30     74.0           79.1               12.6 +/-    0.84      12.8 +/-    0.84  0.090 / 0.130