PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/13-00:57:30
G07     329.5          57.1                5.6 +/-    0.68       6.6 +/-    0.68  0.110 / 0.110
G08     100.3          50.7                7.1 +/-    0.77       8.9 +/-    0.77  0.110 / 0.140
G09     178.7          71.7                7.4 +/-    0.63       7.8 +/-    0.63  0.040 / 0.050
G11     150.4          11.8                6.7 +/-    6.73      17.9 +/-    6.73  0.030 / 0.050
G23     155.1          44.8                7.0 +/-    0.56       9.5 +/-    0.56  0.050 / 0.060
G27     57.3           32.5                3.9 +/-    1.19       6.5 +/-    1.19  0.040 / 0.060
G28     233.4          19.4                7.1 +/-    3.10      15.9 +/-    3.10  0.250 / 0.580
G30     298.1          30.4                5.9 +/-    1.05      10.3 +/-    1.05  0.180 / 0.520