PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/20-00:28:00
G10     276.4          44.3               10.7 +/-    0.82      14.5 +/-    0.82  0.050 / 0.040
G13     38.6           11.2                7.4 +/-    2.49      20.1 +/-    2.49  0.060 / 0.040
G15     52.2           42.1                7.8 +/-    0.62      10.9 +/-    0.62  0.320 / 0.450
G20     313.0          62.8                9.9 +/-    0.84      10.9 +/-    0.84  0.100 / 0.310
G21     24.4           75.6               10.5 +/-    0.51      10.8 +/-    0.51  0.120 / 0.150
G24     114.6          18.6                9.9 +/-    1.23      22.5 +/-    1.23  0.130 / 0.180
G27     315.1          24.1                8.3 +/-    1.49      16.5 +/-    1.49  0.040 / 0.060
G29     167.5          22.7               12.2 +/-    1.23      25.2 +/-    1.23  0.060 / 0.070
G32     205.6          15.0               15.4 +/-    4.98      38.2 +/-    4.98  0.080 / 0.060