PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/08-16:28:00
G07     12.8           66.6                9.5 +/-    0.84      10.2 +/-    0.84  0.100 / 0.150
G08     75.5           51.4               10.1 +/-    1.13      12.5 +/-    1.13  0.110 / 0.120
G09     183.2          60.3               11.2 +/-    0.48      12.7 +/-    0.48  0.040 / 0.030
G11     135.7          22.9               10.8 +/-    1.08      22.2 +/-    1.08  0.040 / 0.030
G23     158.7          27.3               10.3 +/-    1.56      19.1 +/-    1.56  0.050 / 0.060
G27     45.5           24.6                9.7 +/-    1.46      19.1 +/-    1.46  0.040 / 0.060
G28     247.0          35.3               10.9 +/-    1.56      17.2 +/-    1.56  0.090 / 0.250
G30     314.6          46.5               10.0 +/-    0.87      13.1 +/-    0.87  0.080 / 0.140