PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/19-22:57:50
G01     117.6          18.5               10.5 +/-    2.53      23.9 +/-    2.53  0.040 / 0.040
G07     90.0           62.3               10.8 +/-    0.77      12.1 +/-    0.77  0.030 / 0.030
G08     43.8           28.3                6.3 +/-    2.14      11.5 +/-    2.14  0.090 / 0.160
G09     176.7          25.0               11.5 +/-    1.64      22.4 +/-    1.64  0.090 / 0.150
G11     102.7          40.8                9.8 +/-    0.75      14.1 +/-    0.75  0.060 / 0.060
G13     316.8          21.1                7.9 +/-    1.72      16.9 +/-    1.72  0.070 / 0.060
G17     200.8          27.9               13.1 +/-    1.69      24.0 +/-    1.69  0.110 / 0.150
G18     88.8           20.9                9.8 +/-    1.12      21.1 +/-    1.12  0.090 / 0.120
G28     290.0          55.8               10.2 +/-    1.82      12.1 +/-    1.82  0.140 / 0.140
G30     348.3          69.8                9.7 +/-    1.01      10.2 +/-    1.01  0.110 / 0.120