PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/13-18:58:00
G01     125.9          11.9               13.5 +/-    3.22      36.2 +/-    3.22  0.030 / 0.030
G07     69.4           65.9               12.1 +/-    0.38      13.1 +/-    0.38  0.030 / 0.030
G08     49.4           38.0               10.7 +/-    0.92      16.1 +/-    0.92  0.090 / 0.080
G09     178.7          36.5               12.2 +/-    1.08      18.8 +/-    1.08  0.110 / 0.140
G11     115.8          36.5               13.5 +/-    1.21      20.9 +/-    1.21  0.090 / 0.370
G13     320.6          13.1                5.8 +/-   14.60      15.1 +/-   14.60  0.110 / 0.470
G17     199.3          16.3               10.9 +/-    2.19      26.3 +/-    2.19  0.040 / 0.040
G18     100.5          17.0               11.4 +/-    1.71      27.0 +/-    1.71  0.030 / 0.040
G28     272.6          50.0               12.8 +/-    2.56      16.1 +/-    2.56  0.090 / 0.070
G30     335.7          62.5               11.6 +/-    0.54      13.0 +/-    0.54  0.080 / 0.090