PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/13-00:13:20
G10     255.7          32.1               10.1 +/-    2.34      17.0 +/-    2.34  0.140 / 0.130
G13     48.3           25.4                9.8 +/-    1.96      19.0 +/-    1.96  0.100 / 0.110
G15     74.5           55.3                9.9 +/-    0.88      11.7 +/-    0.88  0.040 / 0.040
G16     291.0          14.9                4.9 +/-    2.44      12.1 +/-    2.44  0.060 / 0.040
G20     278.0          54.0               10.1 +/-    3.15      12.2 +/-    3.15  0.100 / 0.170
G21     341.2          63.6                9.9 +/-    0.58      10.9 +/-    0.58  0.210 / 0.160
G26     263.4          13.1                8.2 +/-    2.01      21.2 +/-    2.01  0.030 / 0.040
G29     164.6          42.8               11.2 +/-    0.75      15.6 +/-    0.75  0.040 / 0.040