PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-18:42:50
G01     122.5          14.6               14.2 +/-    2.63      35.7 +/-    2.63  0.030 / 0.040
G07     80.1           63.8               12.5 +/-    0.60      13.7 +/-    0.60  0.030 / 0.040
G08     46.9           34.7               11.1 +/-    1.29      17.8 +/-    1.29  0.160 / 0.360
G09     178.2          32.0               13.4 +/-    0.70      22.5 +/-    0.70  0.160 / 0.380
G11     110.9          38.6               14.0 +/-    0.60      20.9 +/-    0.60  0.150 / 0.300
G13     319.2          16.6               10.0 +/-    2.53      24.0 +/-    2.53  0.150 / 0.290
G17     200.0          20.4               14.4 +/-    2.12      31.5 +/-    2.12  0.070 / 0.100
G18     96.5           18.9               13.2 +/-    2.72      29.8 +/-    2.72  0.060 / 0.110
G28     278.8          52.2               12.3 +/-    3.10      15.1 +/-    3.10  0.040 / 0.040
G30     342.0          66.2               10.5 +/-    0.78      11.4 +/-    0.78  0.040 / 0.030