PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/27-17:43:10
G07     50.7           67.6                9.6 +/-    1.17      10.3 +/-    1.17  0.050 / 0.040
G08     56.1           44.0               10.1 +/-    1.69      13.8 +/-    1.69  0.040 / 0.040
G09     179.8          44.7               12.7 +/-    0.63      17.1 +/-    0.63  0.030 / 0.030
G11     123.8          32.1               10.0 +/-    1.40      16.7 +/-    1.40  0.020 / 0.030
G18     107.6          13.3                9.3 +/-    1.80      24.1 +/-    1.80  0.190 / 0.100
G23     160.4          13.8                9.0 +/-    2.26      22.9 +/-    2.26  0.130 / 0.110
G27     39.0           14.0                6.7 +/-    2.57      17.0 +/-    2.57  0.180 / 0.420
G28     262.4          45.2               11.0 +/-    2.87      14.7 +/-    2.87  0.130 / 0.360
G30     327.7          56.8                9.5 +/-    0.84      11.1 +/-    0.84  0.240 / 0.170