PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/22-18:12:50
G07     60.7           66.8               10.9 +/-    0.71      11.7 +/-    0.71  0.060 / 0.090
G08     52.4           41.1                9.9 +/-    0.70      14.2 +/-    0.70  0.050 / 0.090
G09     179.3          40.5               13.9 +/-    0.82      20.1 +/-    0.82  0.030 / 0.030
G11     119.9          34.4               12.7 +/-    0.80      20.5 +/-    0.80  0.040 / 0.040
G17     199.0          12.5               13.5 +/-    0.76      35.5 +/-    0.76  0.030 / 0.040
G18     104.1          15.2               12.5 +/-    1.55      30.8 +/-    1.55  0.030 / 0.040
G23     160.6          10.3               12.9 +/-    5.06      35.6 +/-    5.06  0.220 / 0.380
G27     37.9           10.9               10.3 +/-    3.37      28.2 +/-    3.37  0.230 / 0.360
G28     267.4          47.7               13.3 +/-    1.20      17.3 +/-    1.20  0.080 / 0.220
G30     331.7          59.7               10.3 +/-    0.76      11.8 +/-    0.76  0.090 / 0.230