PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/15-00:12:30
G02     347.6          78.3                9.6 +/-    0.91       9.8 +/-    0.91  0.040 / 0.040
G05     163.0          34.5               16.0 +/-    1.00      25.5 +/-    1.00  0.030 / 0.040
G06     41.8           39.5                7.8 +/-    0.23      11.4 +/-    0.23  0.050 / 0.100
G12     310.9          71.9                9.8 +/-    0.57      10.2 +/-    0.57  0.040 / 0.090
G17     85.1           14.0               12.1 +/-    2.00      30.9 +/-    2.00  0.080 / 0.130
G19     74.5           28.4               10.8 +/-    0.66      19.7 +/-    0.66  0.080 / 0.140
G24     228.1          22.5               17.3 +/-    0.89      35.8 +/-    0.89  0.030 / 0.040
G25     317.3          28.3                8.2 +/-    1.26      14.9 +/-    1.26  0.030 / 0.040