PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/21-19:12:50
G01     73.5           33.2               11.0 +/-    0.92      18.0 +/-    0.92  0.090 / 0.240
G07     136.1          33.5               12.4 +/-    0.74      20.2 +/-    0.74  0.110 / 0.270
G11     55.8           32.9                9.7 +/-    0.95      16.1 +/-    0.95  0.030 / 0.030
G13     277.5          37.7               12.9 +/-    1.83      19.5 +/-    1.83  0.030 / 0.030
G15     305.0          14.5                8.6 +/-    2.42      21.7 +/-    2.42  0.050 / 0.090
G17     229.0          63.9               14.3 +/-    0.71      15.8 +/-    0.71  0.040 / 0.080
G18     51.1           19.5               10.7 +/-    2.87      23.9 +/-    2.87  0.030 / 0.040
G19     222.6          38.4               14.7 +/-    2.28      22.0 +/-    2.28  0.030 / 0.040
G28     16.0           59.7               11.4 +/-    0.73      13.0 +/-    0.73  0.150 / 0.200
G30     133.0          63.2               13.4 +/-    0.36      14.8 +/-    0.36  0.120 / 0.160