PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/12-09:57:50
G10     299.1          52.8                4.4 +/-    1.82       5.4 +/-    1.82  0.040 / 0.030
G14     209.9          13.0                2.7 +/-    2.87       7.0 +/-    2.87  0.040 / 0.030
G15     45.9           26.7                2.2 +/-    2.50       4.2 +/-    2.50  0.230 / 0.120
G20     354.6          65.3                5.3 +/-    0.58       5.8 +/-    0.58  0.120 / 0.170
G21     103.7          70.4                7.1 +/-    0.78       7.4 +/-    0.78  0.130 / 0.390
G24     94.9           26.5                5.4 +/-    1.95      10.2 +/-    1.95  0.100 / 0.470
G27     301.9          33.2                3.1 +/-    2.97       5.2 +/-    2.97  0.090 / 0.050
G32     211.4          28.5                6.9 +/-    1.40      12.5 +/-    1.40  0.100 / 0.050