PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/15-23:28:00
G10     242.9          21.4               11.2 +/-    1.51      23.8 +/-    1.51  0.030 / 0.040
G13     62.5           33.1                7.1 +/-    1.28      11.7 +/-    1.28  0.030 / 0.040
G15     104.9          57.0                8.9 +/-    0.62      10.4 +/-    0.62  0.110 / 0.170
G16     305.7          14.7                4.6 +/-    2.01      11.5 +/-    2.01  0.120 / 0.140
G20     258.4          44.1                9.0 +/-    3.34      12.3 +/-    3.34  0.030 / 0.050
G21     323.1          53.1                7.5 +/-    0.55       9.1 +/-    0.55  0.040 / 0.050
G26     277.8          18.4                7.8 +/-    1.30      17.9 +/-    1.30  0.080 / 0.110
G29     159.3          60.0                9.6 +/-    0.44      10.9 +/-    0.44  0.050 / 0.120