PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/23-02:12:50
G01     46.3           22.3                3.1 +/-    0.65       6.5 +/-    0.65  0.020 / 0.020
G06     178.2          28.8                7.6 +/-    1.36      13.7 +/-    1.36  0.020 / 0.020
G11     44.4           13.3                1.8 +/-    0.94       4.6 +/-    0.94  0.080 / 0.110
G13     246.1          27.4                6.4 +/-    2.06      11.9 +/-    2.06  0.070 / 0.110
G15     278.0          15.0                5.6 +/-    2.27      13.9 +/-    2.27  0.070 / 0.150
G17     329.5          76.6                5.2 +/-    0.78       5.3 +/-    0.78  0.070 / 0.190
G19     256.9          64.2                4.5 +/-    1.75       4.9 +/-    1.75  0.040 / 0.060
G24     318.8          11.7               -1.6 +/-   21.82      -4.4 +/-   21.82  0.040 / 0.050
G28     60.8           50.3                4.5 +/-    0.60       5.6 +/-    0.60  0.090 / 0.160
G30     150.8          32.2                8.2 +/-    0.99      13.7 +/-    0.99  0.080 / 0.190