PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/28-02:58:10
G02     201.0          30.7                5.2 +/-    1.22       9.0 +/-    1.22  0.070 / 0.090
G06     169.1          61.7                5.6 +/-    0.36       6.3 +/-    0.36  0.070 / 0.090
G17     28.2           55.2                3.0 +/-    1.18       3.5 +/-    1.18  0.040 / 0.040
G19     348.3          68.2                2.1 +/-    0.46       2.2 +/-    0.46  0.030 / 0.040
G24     304.3          34.4                1.9 +/-    1.18       3.0 +/-    1.18  0.030 / 0.020
G28     97.3           34.3                3.7 +/-    0.80       6.0 +/-    0.80  0.030 / 0.030