PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/13-22:58:00
G01     126.7          11.5              -15.0 +/-   28.99     -40.6 +/-   28.99  0.070 / 0.080
G07     63.2           67.5               11.5 +/-    0.44      12.3 +/-    0.44  0.080 / 0.090
G08     49.3           37.4                9.7 +/-    0.77      14.8 +/-    0.77  0.100 / 0.300
G09     178.0          36.2               12.2 +/-    0.88      19.0 +/-    0.88  0.090 / 0.270
G11     116.1          36.0               13.3 +/-    1.07      20.7 +/-    1.07  0.030 / 0.030
G13     320.9          12.3               -1.4 +/-   21.19      -3.6 +/-   21.19  0.030 / 0.040
G17     198.8          16.9               12.2 +/-    1.73      28.9 +/-    1.73  0.080 / 0.090
G18     99.7           16.6               11.9 +/-    1.28      28.5 +/-    1.28  0.060 / 0.090
G28     272.7          50.5               11.8 +/-    2.84      14.8 +/-    2.84  0.210 / 0.340
G30     332.4          60.4                9.3 +/-    0.56      10.6 +/-    0.56  0.120 / 0.320