PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/21-02:58:10
G10     295.9          52.0                9.9 +/-    0.87      12.2 +/-    0.87  0.050 / 0.050
G15     46.3           28.8                6.2 +/-    0.86      11.1 +/-    0.86  0.040 / 0.040
G20     347.6          65.3                8.7 +/-    0.94       9.4 +/-    0.94  0.060 / 0.030
G21     89.0           75.2               10.9 +/-    0.75      11.2 +/-    0.75  0.070 / 0.040
G24     99.9           25.8                9.8 +/-    0.56      18.8 +/-    0.56  0.040 / 0.040
G27     303.5          32.9               10.0 +/-    1.57      16.5 +/-    1.57  0.040 / 0.010
G32     209.9          27.9               14.1 +/-    0.82      25.7 +/-    0.82  0.060 / 0.030