PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/31-08:27:50
G10     291.2          50.2                5.7 +/-    2.94       7.1 +/-    2.94  0.050 / 0.040
G15     46.9           31.4                3.5 +/-    1.14       5.9 +/-    1.14  0.040 / 0.040
G20     341.2          65.3                5.6 +/-    0.60       6.1 +/-    0.60  0.120 / 0.100
G21     85.4           74.3                7.4 +/-    0.35       7.6 +/-    0.35  0.130 / 0.090
G24     101.3          24.4                6.6 +/-    1.65      13.1 +/-    1.65  0.110 / 0.170
G27     307.0          30.6                5.9 +/-    1.00      10.1 +/-    1.00  0.110 / 0.160
G32     209.5          22.5                5.7 +/-    1.36      11.7 +/-    1.36  0.070 / 0.100