PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/12-18:42:30
G07     46.1           67.9               10.7 +/-    0.56      11.5 +/-    0.56  0.030 / 0.040
G08     56.9           44.4               11.5 +/-    1.16      15.6 +/-    1.16  0.040 / 0.040
G09     179.9          45.8               13.9 +/-    0.68      18.6 +/-    0.68  0.230 / 0.310
G11     124.6          31.4               13.4 +/-    1.51      22.8 +/-    1.51  0.270 / 0.200
G18     108.3          12.8               13.4 +/-    2.43      35.2 +/-    2.43  0.070 / 0.060
G23     160.6          15.3               13.9 +/-    1.25      34.2 +/-    1.25  0.070 / 0.050
G27     39.4           15.0                9.1 +/-    2.85      22.7 +/-    2.85  0.200 / 0.340
G28     261.2          44.8               13.8 +/-    3.40      18.7 +/-    3.40  0.140 / 0.320
G30     325.9          55.5               10.2 +/-    0.42      12.1 +/-    0.42  0.140 / 0.290