PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/20-18:43:20
G01     120.6          16.1               13.7 +/-    1.30      33.1 +/-    1.30  0.050 / 0.070
G07     85.1           62.6               13.4 +/-    0.55      14.9 +/-    0.55  0.040 / 0.060
G08     45.7           32.8               10.1 +/-    0.63      16.7 +/-    0.63  0.030 / 0.040
G09     177.9          29.7               14.2 +/-    1.10      25.0 +/-    1.10  0.030 / 0.040
G11     108.1          39.6               14.7 +/-    0.61      21.6 +/-    0.61  0.040 / 0.040
G13     318.4          18.4               11.5 +/-    1.69      26.3 +/-    1.69  0.030 / 0.040
G17     200.4          22.7               14.9 +/-    2.85      30.8 +/-    2.85  0.100 / 0.230
G18     94.3           19.8               12.9 +/-    0.91      28.6 +/-    0.91  0.080 / 0.240
G28     282.3          53.4               14.9 +/-    1.08      18.0 +/-    1.08  0.080 / 0.210
G30     345.8          68.0               12.2 +/-    0.54      13.1 +/-    0.54  0.080 / 0.220