PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/21-23:43:00
G10     258.3          33.9               10.2 +/-    2.23      16.5 +/-    2.23  0.050 / 0.040
G13     46.5           23.6                9.4 +/-    1.67      19.0 +/-    1.67  0.040 / 0.040
G15     70.3           54.2               10.7 +/-    0.65      12.9 +/-    0.65  0.080 / 0.200
G16     288.1          14.6                7.2 +/-    2.01      18.1 +/-    2.01  0.110 / 0.180
G20     282.0          55.4               10.2 +/-    2.49      12.1 +/-    2.49  0.200 / 0.270
G21     344.9          65.4               10.6 +/-    0.96      11.6 +/-    0.96  0.290 / 0.350
G26     260.9          12.0               11.2 +/-    2.56      29.9 +/-    2.56  0.040 / 0.030
G27     322.0          11.1               -7.4 +/-   31.28     -20.1 +/-   31.28  0.040 / 0.040
G29     165.3          40.2               13.3 +/-    1.23      19.2 +/-    1.23  0.110 / 0.350