PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/20-19:27:50
G07     348.9          62.8               13.4 +/-    0.50      14.8 +/-    0.50  0.030 / 0.040
G08     89.6           51.8               14.5 +/-    0.93      17.9 +/-    0.93  0.040 / 0.040
G09     188.3          70.3               12.5 +/-    0.54      13.2 +/-    0.54  0.030 / 0.030
G11     141.8          16.7               13.9 +/-    1.60      33.1 +/-    1.60  0.030 / 0.030
G23     157.2          38.6               12.4 +/-    0.99      18.4 +/-    0.99  0.100 / 0.080
G27     53.1           31.1               11.8 +/-    1.13      20.3 +/-    1.13  0.110 / 0.080
G28     239.1          29.0               12.8 +/-    1.25      23.0 +/-    1.25  0.140 / 0.150
G30     305.4          38.3               10.9 +/-    0.97      16.4 +/-    0.97  0.130 / 0.180