PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/20-00:12:40
G10     268.5          40.3               11.1 +/-    1.30      16.0 +/-    1.30  0.050 / 0.040
G13     41.0           16.5                7.8 +/-    2.12      18.6 +/-    2.12  0.040 / 0.040
G15     57.7           47.6                9.0 +/-    0.69      11.6 +/-    0.69  0.190 / 0.270
G16     278.8          12.1                9.2 +/-    2.14      24.6 +/-    2.14  0.140 / 0.340
G20     299.2          60.3                9.8 +/-    0.82      11.1 +/-    0.82  0.120 / 0.150
G21     4.0            72.0               10.4 +/-    0.65      10.9 +/-    0.65  0.130 / 0.220
G24     120.4          14.7               11.4 +/-    2.23      28.6 +/-    2.23  0.030 / 0.040
G27     318.7          19.0                8.2 +/-    1.57      18.4 +/-    1.57  0.030 / 0.050
G29     166.9          29.6               12.8 +/-    2.51      22.7 +/-    2.51  0.090 / 0.070