PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/28-22:27:50
G01     114.9          20.4               10.4 +/-    1.45      22.6 +/-    1.45  0.040 / 0.040
G07     96.2           60.1                9.0 +/-    0.76      10.2 +/-    0.76  0.030 / 0.040
G08     42.9           25.8                7.0 +/-    2.57      13.4 +/-    2.57  0.130 / 0.150
G09     176.5          22.1               10.8 +/-    1.96      22.6 +/-    1.96  0.080 / 0.160
G11     98.6           41.7                9.5 +/-    0.67      13.5 +/-    0.67  0.060 / 0.050
G13     315.1          23.4                6.3 +/-    1.52      12.8 +/-    1.52  0.050 / 0.050
G17     201.7          30.9               11.9 +/-    0.93      20.5 +/-    0.93  0.110 / 0.180
G18     85.9           21.8                7.7 +/-    1.99      16.1 +/-    1.99  0.140 / 0.170
G28     295.1          57.0                7.8 +/-    0.77       9.2 +/-    0.77  0.090 / 0.270
G30     355.3          72.4                7.3 +/-    0.63       7.6 +/-    0.63  0.100 / 0.220