PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/13-21:57:40
G07     352.3          63.7               12.9 +/-    0.49      14.2 +/-    0.49  0.100 / 0.140
G08     83.2           51.4               11.5 +/-    1.29      14.2 +/-    1.29  0.090 / 0.150
G09     184.2          66.2               13.0 +/-    0.47      14.1 +/-    0.47  0.040 / 0.040
G11     139.5          18.7               13.7 +/-    1.35      31.2 +/-    1.35  0.040 / 0.040
G23     158.3          36.1               12.6 +/-    1.04      19.6 +/-    1.04  0.030 / 0.020
G27     50.8           29.7               10.8 +/-    1.11      19.1 +/-    1.11  0.030 / 0.030
G28     241.9          32.0               13.1 +/-    1.53      22.1 +/-    1.53  0.110 / 0.090
G30     307.3          39.6               11.8 +/-    0.99      17.2 +/-    0.99  0.070 / 0.120