PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/22-21:43:10
G07     16.8           67.4               10.9 +/-    0.79      11.7 +/-    0.79  0.030 / 0.040
G08     66.8           48.6               10.9 +/-    0.75      14.0 +/-    0.75  0.040 / 0.040
G09     180.6          54.7               12.9 +/-    0.38      15.4 +/-    0.38  0.150 / 0.120
G11     131.9          25.6               14.2 +/-    2.44      27.4 +/-    2.44  0.140 / 0.210
G23     160.2          25.3               11.7 +/-    1.62      22.7 +/-    1.62  0.080 / 0.080
G27     43.6           22.5                8.6 +/-    2.25      17.9 +/-    2.25  0.080 / 0.120
G28     251.7          39.5               13.9 +/-    0.96      20.4 +/-    0.96  0.060 / 0.040
G30     316.2          47.4               10.6 +/-    0.79      13.9 +/-    0.79  0.050 / 0.040