PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/27-00:13:00
G10     284.3          47.8                9.3 +/-    2.59      12.1 +/-    2.59  0.080 / 0.130
G15     48.9           36.9                8.2 +/-    0.80      12.6 +/-    0.80  0.070 / 0.090
G20     326.6          64.4               10.3 +/-    0.58      11.3 +/-    0.58  0.040 / 0.030
G21     50.0           77.2               11.0 +/-    0.67      11.3 +/-    0.67  0.040 / 0.030
G24     109.0          21.9                9.6 +/-    2.18      20.2 +/-    2.18  0.040 / 0.060
G27     310.8          28.4                8.2 +/-    1.59      14.8 +/-    1.59  0.060 / 0.070
G29     167.7          16.8               11.6 +/-    1.77      27.6 +/-    1.77  0.100 / 0.100
G32     206.9          21.0               12.2 +/-    0.93      26.3 +/-    0.93  0.100 / 0.140