PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/23-23:57:30
G10     269.2          40.7                9.8 +/-    1.46      14.1 +/-    1.46  0.040 / 0.030
G13     40.8           16.0                7.4 +/-    2.57      18.1 +/-    2.57  0.040 / 0.040
G15     57.2           47.2                8.4 +/-    0.92      11.0 +/-    0.92  0.160 / 0.310
G16     278.1          11.9                9.2 +/-    1.58      24.7 +/-    1.58  0.170 / 0.450
G21     5.4            72.3                9.8 +/-    0.59      10.2 +/-    0.59  0.130 / 0.240
G24     120.0          15.1               10.5 +/-    1.88      26.0 +/-    1.88  0.180 / 0.220
G27     318.4          19.5                7.5 +/-    1.54      16.8 +/-    1.54  0.030 / 0.040
G29     167.0          29.1               11.9 +/-    1.88      21.3 +/-    1.88  0.030 / 0.040