PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/29-23:57:40
G02     302.9          81.6                8.6 +/-    1.20       8.7 +/-    1.20  0.030 / 0.030
G05     166.6          26.5               13.7 +/-    2.00      25.9 +/-    2.00  0.030 / 0.040
G06     39.1           50.3                8.9 +/-    0.77      11.2 +/-    0.77  0.080 / 0.150
G12     319.1          60.1                9.1 +/-    0.91      10.3 +/-    0.91  0.090 / 0.150
G17     79.5           15.5                8.6 +/-    2.36      21.1 +/-    2.36  0.120 / 0.210
G19     67.5           31.5                9.2 +/-    1.16      15.6 +/-    1.16  0.130 / 0.160
G24     233.8          27.8               11.3 +/-    1.05      20.7 +/-    1.05  0.040 / 0.040
G25     317.4          22.1                7.3 +/-    1.47      15.3 +/-    1.47  0.050 / 0.040