PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/21-15:42:50
G03     188.0          20.5               16.4 +/-    1.08      35.7 +/-    1.08  0.080 / 0.090
G07     291.7          41.3               13.7 +/-    2.77      19.5 +/-    2.77  0.060 / 0.100
G08     142.7          25.8               17.2 +/-    0.98      33.0 +/-    0.98  0.360 / 0.430
G09     320.4          58.7               13.0 +/-    0.56      14.9 +/-    0.56  0.260 / 0.240
G16     44.9           44.8               11.1 +/-    0.84      15.0 +/-    0.84  0.210 / 0.240
G23     100.2          81.5               12.5 +/-    0.37      12.6 +/-    0.37  0.090 / 0.310
G26     43.6           16.0                8.6 +/-    2.54      20.9 +/-    2.54  0.040 / 0.080
G27     105.0          32.3               14.8 +/-    0.88      24.8 +/-    0.88  0.050 / 0.070
G30     272.3          12.4               12.1 +/-    5.98      31.9 +/-    5.98  0.060 / 0.080