PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/21-19:58:00
G07     24.9           67.9               12.4 +/-    0.79      13.3 +/-    0.79  0.030 / 0.040
G08     64.6           48.0               12.4 +/-    1.06      16.0 +/-    1.06  0.020 / 0.030
G09     180.8          53.0               14.9 +/-    0.50      18.1 +/-    0.50  0.160 / 0.260
G11     130.4          27.0               12.9 +/-    1.04      24.1 +/-    1.04  0.320 / 0.170
G23     160.3          22.6               14.4 +/-    1.04      29.8 +/-    1.04  0.060 / 0.110
G27     42.3           20.6                9.8 +/-    2.75      21.3 +/-    2.75  0.060 / 0.160
G28     253.6          40.5               13.8 +/-    2.17      19.9 +/-    2.17  0.050 / 0.050
G30     318.7          49.6               10.9 +/-    0.47      13.8 +/-    0.47  0.040 / 0.050