PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/13-19:58:00
G01     101.2          27.8               12.3 +/-    1.06      22.6 +/-    1.06  0.040 / 0.040
G07     116.6          48.1               12.9 +/-    0.76      16.6 +/-    0.76  0.040 / 0.040
G08     41.5           15.1                8.0 +/-    2.31      19.8 +/-    2.31  0.050 / 0.050
G09     174.4          10.2               11.2 +/-    3.30      31.0 +/-    3.30  0.060 / 0.050
G11     79.7           42.5               11.9 +/-    1.22      16.6 +/-    1.22  0.060 / 0.120
G13     304.7          32.5                9.3 +/-    2.46      15.4 +/-    2.46  0.050 / 0.150
G17     207.2          44.1               13.3 +/-    0.80      18.1 +/-    0.80  0.030 / 0.020
G18     72.1           23.9                9.8 +/-    1.46      19.7 +/-    1.46  0.040 / 0.020
G28     319.5          60.4               10.8 +/-    0.95      12.2 +/-    0.95  0.160 / 0.370
G30     59.9           79.4               12.3 +/-    0.45      12.5 +/-    0.45  0.160 / 0.320