PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-18:43:00
G01     122.5          14.6               15.4 +/-    2.17      38.7 +/-    2.17  0.100 / 0.350
G07     80.1           63.8               14.0 +/-    0.41      15.4 +/-    0.41  0.130 / 0.320
G08     46.9           34.7               10.8 +/-    0.48      17.2 +/-    0.48  0.030 / 0.040
G09     178.2          32.0               15.6 +/-    1.86      26.3 +/-    1.86  0.030 / 0.050
G11     110.9          38.6               15.6 +/-    1.11      23.2 +/-    1.11  0.030 / 0.040
G13     319.2          16.6               10.7 +/-    1.64      25.6 +/-    1.64  0.030 / 0.050
G17     200.0          20.4               15.2 +/-    1.31      33.0 +/-    1.31  0.060 / 0.120
G18     96.5           18.9               14.2 +/-    1.45      32.1 +/-    1.45  0.070 / 0.100
G28     278.8          52.2               14.0 +/-    0.60      17.2 +/-    0.60  0.150 / 0.300
G30     342.0          66.2               12.3 +/-    0.51      13.3 +/-    0.51  0.140 / 0.250