PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/22-16:12:40
G07     309.5          49.8                9.8 +/-    1.52      12.4 +/-    1.52  0.040 / 0.060
G08     130.0          38.4               10.5 +/-    0.46      15.8 +/-    0.46  0.040 / 0.060
G09     311.7          74.5               10.1 +/-    0.54      10.5 +/-    0.54  0.090 / 0.270
G16     41.9           30.1                8.1 +/-    0.66      14.2 +/-    0.66  0.090 / 0.210
G23     141.1          66.9               11.0 +/-    1.03      11.8 +/-    1.03  0.050 / 0.090
G27     85.5           37.4                9.9 +/-    0.62      15.0 +/-    0.62  0.070 / 0.070
G30     284.2          21.7                9.6 +/-    1.63      20.3 +/-    1.63  0.060 / 0.140