PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/20-19:13:10
G07     337.5          59.8               12.8 +/-    0.54      14.5 +/-    0.54  0.040 / 0.050
G08     100.7          50.7               13.1 +/-    0.65      16.3 +/-    0.65  0.040 / 0.040
G09     198.8          77.0               13.3 +/-    0.61      13.7 +/-    0.61  0.030 / 0.030
G11     146.0          12.6               13.7 +/-    2.02      36.1 +/-    2.02  0.030 / 0.030
G16     45.5           13.6                9.8 +/-    2.03      25.1 +/-    2.03  0.080 / 0.080
G23     155.1          45.5               12.8 +/-    0.66      17.2 +/-    0.66  0.040 / 0.080
G27     59.5           34.3               12.7 +/-    1.73      20.4 +/-    1.73  0.120 / 0.220
G28     234.2          23.9               12.9 +/-    2.04      25.9 +/-    2.04  0.150 / 0.210
G30     300.2          34.0               10.5 +/-    1.36      16.9 +/-    1.36  0.100 / 0.130