PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/21-23:27:50
G01     100.8          28.1               11.8 +/-    1.37      21.6 +/-    1.37  0.030 / 0.040
G07     116.6          49.5               12.1 +/-    0.76      15.4 +/-    0.76  0.040 / 0.040
G08     41.4           13.6                7.4 +/-    1.91      19.1 +/-    1.91  0.140 / 0.280
G11     78.6           42.1               12.1 +/-    0.83      17.0 +/-    0.83  0.170 / 0.210
G13     304.3          32.6                7.6 +/-    2.69      12.6 +/-    2.69  0.070 / 0.100
G17     207.2          45.9               12.2 +/-    0.64      16.3 +/-    0.64  0.070 / 0.110
G18     70.2           23.4                9.6 +/-    1.30      19.5 +/-    1.30  0.040 / 0.050
G19     210.4          17.6                4.7 +/-   13.22      11.0 +/-   13.22  0.040 / 0.050
G28     322.4          60.9                9.2 +/-    0.80      10.4 +/-    0.80  0.110 / 0.300
G30     54.1           80.0               10.7 +/-    0.65      10.9 +/-    0.65  0.150 / 0.220