PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/29-23:57:30
G02     302.9          81.6                8.1 +/-    0.93       8.2 +/-    0.93  0.140 / 0.180
G05     166.6          26.5               13.1 +/-    2.26      24.7 +/-    2.26  0.080 / 0.160
G06     39.1           50.3                7.6 +/-    0.43       9.5 +/-    0.43  0.070 / 0.220
G12     319.1          60.1                7.5 +/-    0.78       8.5 +/-    0.78  0.070 / 0.230
G17     79.5           15.5                8.0 +/-    1.29      19.6 +/-    1.29  0.040 / 0.030
G19     67.5           31.5                9.0 +/-    0.55      15.3 +/-    0.55  0.040 / 0.030
G24     233.8          27.8               11.5 +/-    1.91      21.1 +/-    1.91  0.040 / 0.050
G25     317.4          22.1                5.4 +/-    4.03      11.3 +/-    4.03  0.030 / 0.040