PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/22-23:28:00
G10     253.6          30.6               10.0 +/-    1.79      17.3 +/-    1.79  0.050 / 0.040
G13     50.1           26.8                5.9 +/-    2.50      11.0 +/-    2.50  0.040 / 0.050
G15     78.9           56.4                8.0 +/-    0.60       9.4 +/-    0.60  0.080 / 0.220
G16     292.9          15.3                4.5 +/-    1.33      11.1 +/-    1.33  0.140 / 0.200
G20     274.6          52.5                9.6 +/-    3.54      11.7 +/-    3.54  0.030 / 0.030
G21     337.8          62.0                8.0 +/-    0.89       8.9 +/-    0.89  0.030 / 0.030
G26     265.3          14.1                7.5 +/-    3.19      19.2 +/-    3.19  0.110 / 0.510
G29     164.1          45.6                9.7 +/-    0.57      13.0 +/-    0.57  0.130 / 0.360