PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/17-23:27:50
G01     108.6          24.4                9.6 +/-    1.13      19.0 +/-    1.13  0.230 / 0.320
G07     106.9          55.6                8.6 +/-    0.84      10.1 +/-    0.84  0.190 / 0.290
G08     41.7           19.8                5.8 +/-    2.42      12.8 +/-    2.42  0.040 / 0.060
G09     175.2          15.5                8.6 +/-    3.26      21.2 +/-    3.26  0.050 / 0.060
G11     89.0           42.6                9.5 +/-    0.92      13.2 +/-    0.92  0.030 / 0.030
G13     310.7          28.1                5.6 +/-    1.22      10.2 +/-    1.22  0.030 / 0.030
G17     203.9          38.1                9.8 +/-    0.98      14.7 +/-    0.98  0.070 / 0.150
G18     78.2           23.0                7.8 +/-    1.42      16.1 +/-    1.42  0.070 / 0.160
G28     307.9          59.3                7.4 +/-    1.43       8.4 +/-    1.43  0.140 / 0.170
G30     14.5           77.1                7.6 +/-    1.00       7.8 +/-    1.00  0.150 / 0.280