PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/25-18:27:40
G07     89.4           61.3               13.3 +/-    0.59      14.9 +/-    0.59  0.080 / 0.210
G08     44.9           31.2                9.9 +/-    0.42      16.8 +/-    0.42  0.070 / 0.200
G09     177.7          27.7               14.6 +/-    2.13      26.9 +/-    2.13  0.030 / 0.040
G11     105.6          40.4               13.6 +/-    0.45      19.6 +/-    0.45  0.040 / 0.040
G13     317.5          20.0               12.6 +/-    2.18      27.8 +/-    2.18  0.120 / 0.530
G17     200.9          24.5               14.1 +/-    1.52      27.8 +/-    1.52  0.120 / 0.450
G18     92.3           20.5               12.0 +/-    0.95      26.0 +/-    0.95  0.060 / 0.140
G28     285.5          54.2               14.1 +/-    0.75      17.0 +/-    0.75  0.100 / 0.110
G30     349.9          69.8               12.9 +/-    1.12      13.7 +/-    1.12  0.040 / 0.060