PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/14-08:58:00
G10     268.7          40.0                4.4 +/-    1.35       6.3 +/-    1.35  0.030 / 0.030
G13     41.1           16.6                1.9 +/-    2.51       4.6 +/-    2.51  0.040 / 0.040
G15     57.0           46.8                4.3 +/-    0.84       5.6 +/-    0.84  0.070 / 0.060
G16     283.6          11.1                4.0 +/-    1.41      10.9 +/-    1.41  0.080 / 0.070
G20     300.9          61.1                3.3 +/-    0.60       3.7 +/-    0.60  0.230 / 0.390
G21     19.0           73.6                4.9 +/-    0.71       5.0 +/-    0.71  0.220 / 0.270
G24     117.6          15.2                5.1 +/-    1.71      12.7 +/-    1.71  0.120 / 0.230
G27     319.0          18.1                3.1 +/-    1.41       7.2 +/-    1.41  0.210 / 0.300
G29     165.1          24.9                5.6 +/-    1.68      11.0 +/-    1.68  0.030 / 0.040