PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/21-23:57:50
G10     265.2          38.3               11.2 +/-    1.84      16.7 +/-    1.84  0.040 / 0.050
G13     42.5           18.8                9.8 +/-    2.87      22.1 +/-    2.87  0.040 / 0.050
G15     61.0           49.9               10.8 +/-    1.00      13.6 +/-    1.00  0.190 / 0.360
G16     281.6          13.1                8.3 +/-    1.84      21.7 +/-    1.84  0.330 / 0.420
G20     293.4          58.9                9.9 +/-    1.16      11.3 +/-    1.16  0.270 / 0.270
G21     357.0          70.0               10.6 +/-    0.57      11.2 +/-    0.57  0.170 / 0.220
G24     123.0          12.9               12.5 +/-    3.06      32.7 +/-    3.06  0.030 / 0.050
G27     319.9          16.6                8.7 +/-    2.51      20.8 +/-    2.51  0.040 / 0.050
G29     166.5          32.9               13.4 +/-    1.18      22.1 +/-    1.18  0.130 / 0.300