PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/01-02:27:40
G02     199.1          18.6                4.6 +/-    2.12      10.5 +/-    2.12  0.040 / 0.060
G06     174.2          48.1                5.6 +/-    0.58       7.2 +/-    0.58  0.040 / 0.060
G13     230.9          15.8                5.4 +/-    2.57      13.1 +/-    2.57  0.040 / 0.040
G17     13.1           64.5                3.2 +/-    0.52       3.5 +/-    0.52  0.030 / 0.040
G19     309.6          71.4                2.6 +/-    0.36       2.7 +/-    0.36  0.030 / 0.030
G24     312.9          26.1                2.9 +/-    1.40       5.6 +/-    1.40  0.030 / 0.030
G28     83.9           41.5                4.0 +/-    0.86       5.7 +/-    0.86  0.280 / 0.280
G30     155.5          15.1                6.5 +/-    2.78      16.2 +/-    2.78  0.160 / 0.240