PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/22-17:58:10
G07     43.3           67.9               10.5 +/-    0.23      11.3 +/-    0.23  0.050 / 0.120
G08     58.6           45.5                9.4 +/-    0.46      12.6 +/-    0.46  0.050 / 0.100
G09     180.2          47.4               13.7 +/-    1.73      17.9 +/-    1.73  0.030 / 0.040
G11     126.0          30.6               11.1 +/-    0.63      19.2 +/-    0.63  0.020 / 0.040
G18     109.7          12.0               11.2 +/-    2.82      29.8 +/-    2.82  0.040 / 0.040
G23     160.4          16.3               10.4 +/-    2.34      25.1 +/-    2.34  0.030 / 0.040
G27     39.8           16.0                8.5 +/-    1.09      20.7 +/-    1.09  0.140 / 0.230
G28     259.4          43.7               12.4 +/-    2.04      17.0 +/-    2.04  0.110 / 0.340
G30     324.9          54.7               11.3 +/-    1.22      13.5 +/-    1.22  0.080 / 0.360