PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/27-05:28:00
G02     353.8          77.8                3.1 +/-    0.38       3.1 +/-    0.38  0.040 / 0.070
G05     163.1          34.4                5.0 +/-    1.53       7.9 +/-    1.53  0.050 / 0.070
G06     41.1           42.1                3.3 +/-    0.95       4.6 +/-    0.95  0.030 / 0.030
G12     311.9          69.8                4.3 +/-    0.32       4.5 +/-    0.32  0.030 / 0.030
G17     85.6           13.0                3.9 +/-    1.69      10.1 +/-    1.69  0.050 / 0.050
G19     75.4           27.1                3.3 +/-    1.47       6.2 +/-    1.47  0.040 / 0.030
G24     229.0          22.9                5.0 +/-    2.65      10.3 +/-    2.65  0.180 / 0.200
G25     317.4          28.1                2.4 +/-    1.70       4.3 +/-    1.70  0.060 / 0.220