PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/15-22:12:30
G07     16.6           67.5                8.6 +/-    0.82       9.3 +/-    0.82  0.110 / 0.240
G08     66.5           48.4                7.9 +/-    1.03      10.2 +/-    1.03  0.160 / 0.270
G09     180.4          54.4               11.0 +/-    0.69      13.2 +/-    0.69  0.040 / 0.040
G11     131.7          25.7               10.8 +/-    1.53      20.7 +/-    1.53  0.030 / 0.040
G23     160.3          25.2                9.3 +/-    2.62      18.1 +/-    2.62  0.060 / 0.050
G27     43.5           22.4                6.1 +/-    1.98      12.7 +/-    1.98  0.050 / 0.040
G28     252.0          39.8               10.8 +/-    1.11      15.7 +/-    1.11  0.040 / 0.060
G30     316.2          47.3                8.8 +/-    0.95      11.5 +/-    0.95  0.060 / 0.040