PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/26-17:43:10
G07     45.5           67.8               11.3 +/-    0.51      12.1 +/-    0.51  0.030 / 0.040
G08     58.0           45.2               10.3 +/-    0.42      13.9 +/-    0.42  0.030 / 0.040
G09     180.1          46.7               15.2 +/-    1.72      20.0 +/-    1.72  0.050 / 0.090
G11     125.5          30.9               12.8 +/-    0.84      22.0 +/-    0.84  0.050 / 0.100
G18     109.2          12.4               11.1 +/-    2.16      29.3 +/-    2.16  0.040 / 0.050
G23     160.3          15.6               12.6 +/-    2.64      30.9 +/-    2.64  0.040 / 0.060
G27     39.6           15.5                8.8 +/-    1.44      21.7 +/-    1.44  0.120 / 0.290
G28     260.1          44.0               12.9 +/-    1.97      17.7 +/-    1.97  0.140 / 0.320
G30     325.7          55.3               11.9 +/-    0.84      14.1 +/-    0.84  0.120 / 0.410